Search

Your search keyword '"Jenkins D."' showing total 155 results
Start Over Author "Jenkins D." Publisher american physical society
155 results on '"Jenkins D."'

1. Polarized structure function σLT′ from π0p electroproduction data in the resonance region at 0.4GeV2<Q2<1.0GeV2

Author

Isupov, E. L., Burkert, V. D., Golubenko, A. A., Joo, K., Markov, N. S., Mokeev, V. I., Smith, L. C., Armstrong, W. R., Atac, H., Avakian, H., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Bianconi, A., Biondo, L., Biselli, A. S., Bondi, M., Bossù, F., Briscoe, W. J., Brooks, W. K., Bulumulla, D., Capobianco, R. A., Carman, D. S., Carvajal, J. C., Chatagnon, P., Chesnokov, V., Ciullo, G., Cole, P. L., Clary, B. A., Contalbrigo, M., Costantini, G., D'Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fegan, S., Filippi, A., Gavalian, G., Gilfoyle, G. P., Glazier, D.I., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hattawy, M., Hayward, T. B., Heddle, D., Hicks, K., Hobart, A., Holtrop, M., Illari, I., Ireland, D.G., Jenkins, D., Jo, H. S., Keller, D., Khanal, A., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Klimenko, V., Kripko, A., Kubarovsky, V., Lagerquist, V., Lanza, L., Leali, M., Lenisa, P., Livingston, K., MacGregor, I.J.D., Marchand, D., Marsicano, L., Mascagna, V., McKinnon, B., Meziani, Z. E., Migliorati, S., Mineeva, T., Mirazita, M., Munoz Camacho, C., Nadel-Turonski, P., Neupane, K., Niccolai, S., O'Connell, T., Osipenko, M., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paul, S. J., Phelps, W., Pilleux, N., Pogorelko, O., Poudel, J., Price, J. W., Prok, Y., Raue, B. A., Reed, T., Ripani, M., Ritman, J., Rowley, J., Sabatié, F., Salgado, C., Schmidt, A., Schumacher, R. A., Sharabian, Y. G., Shirokov, E. V., Shrestha, U., Simmerling, P., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Tan, J. A., Tyson, R., Ungaro, M., Vallarino, S., Venturelli, L., Voskanyan, H., Voutier, E., Watts, D., Wei, K., Wei, X., Wood, M. H., Yale, B., Zachariou, N., Zhang, J., and Ziegler, V.

Subjects
High Energy Physics::Experiment, ddc:530, Nuclear Experiment
Abstract

The first results on the σLT′ structure function in exclusive π0p electroproduction at invariant masses of the final state of 1.5GeV

Published
2022

2. Polarized structure function σLT′ from π0p electroproduction data in the resonance region at 0.4 GeV2 < Q2 < 1.0 GeV2

Author

Isupov, El, Burkert, Vd, Golubenko, Aa, Joo, K, Markov, Ns, Mokeev, Vi, Smith, Lc, Armstrong, Wr, Atac, H, Avakian, H, Baltzell, Na, Barion, L, Battaglieri, M, Bedlinskiy, I, Benmokhtar, F, Bianconi, A, Biondo, L, Biselli, As, Bondi, M, Boss??, F, Briscoe, Wj, Brooks, Wk, Bulumulla, D, Capobianco, Ra, Carman, Ds, Carvajal, Jc, Chatagnon, P, Chesnokov, V, Ciullo, G, Cole, Pl, Clary, Ba, Contalbrigo, M, Costantini, G, D'Angelo, A, Dashyan, N, De Vita, R, Defurne, M, Deur, A, Diehl, S, Djalali, C, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fegan, S, Filippi, A, Gavalian, G, Gilfoyle, Gp, Glazier, Di, Gothe, Rw, Griffioen, Ka, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Hattawy, M, Hayward, Tb, Heddle, D, Hicks, K, Hobart, A, Holtrop, M, Illari, I, Ireland, Dg, Jenkins, D, H. S., J, Keller, D, Khanal, A, Khandaker, M, Kim, A, Kim, W, Klein, Fj, Klimenko, V, Kripko, A, Kubarovsky, V, Lagerquist, V, Lanza, L, Leali, M, Lenisa, P, Livingston, K, Macgregor, Ijd, Marchand, D, Marsicano, L, Mascagna, V, Mckinnon, B, Meziani, Ze, Migliorati, S, Mineeva, T, Mirazita, M, Munoz Camacho, C, Nadel-Turonski, P, Neupane, K, Niccolai, S, O'Connell, T, Osipenko, M, Pandey, P, Paolone, M, Pappalardo, Ll, Paremuzyan, R, Pasyuk, E, Paul, Sj, Phelps, W, Pilleux, N, Pogorelko, O, Poudel, J, Price, Jw, Prok, Y, Raue, Ba, Reed, T, Ripani, M, Ritman, J, Rowley, J, Sabati??, F, Salgado, C, Schmidt, A, Schumacher, Ra, Sharabian, Yg, Shirokov, Ev, Shrestha, U, Simmerling, P, Sokhan, D, Sparveris, N, Stepanyan, S, Strakovsky, Ii, Strauch, S, Tan, Ja, Tyson, R, Ungaro, M, Vallarino, S, Venturelli, L, Voskanyan, H, Voutier, E, Watts, D, Wei, K, Wei, X, Wood, Mh, Yale, B, Zachariou, N, Zhang, J, and Ziegler, V

Subjects
Settore FIS/04
Published
2022

3. Measurement of the Ge-72(n, y) cross section over a wide neutron energy range at the CERN n_TOF facility

Author

Dietz, M., Lederer-Woods, C., Tattersall, A., Battino, U., Gunsing, F., Heinitz, S., Krtička, M., Lerendegui-Marco, J., Reifarth, R., Valenta, S., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Bečvář, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Harada, H., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Kahl, D., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Kurtulgil, D., Leal-Cidoncha, E., Leeb, H., Meo, S. Lo, Lonsdale, S. J., Macina, D., Manna, A., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P. J., Wright, T., and Žugec, P.

Abstract

The 72Ge(n,γ) cross section was measured for neutron energies up to 300keV at the neutron time-of-flight facility n_TOF (CERN), Geneva, for the first time covering energies relevant to heavy-element synthesis in stars. The measurement was performed at the high-resolution beamline EAR-1, using an isotopically enriched 72GeO2 sample. The prompt capture γ rays were detected with four liquid scintillation detectors, optimized for low neutron sensitivity. We determined resonance capture kernels up to a neutron energy of 43keV, and averaged cross sections from 43 to 300keV. Maxwellian-averaged cross section values were calculated from kT=5 to 100keV, with uncertainties between 3.2% and 7.1%. The new results significantly reduce uncertainties of abundances produced in the slow neutron capture process in massive stars.

Published
2021
Full Text
View/download PDF

4. Destruction of the cosmic gamma-ray emitter Al-26 in massive stars: Study of the key Al-26(n, alpha) reaction

Author

Lederer-Woods, C., Woods, P. J., Davinson, T., Estrade, A., Heyse, J., Kahl, D., Lonsdale, S. J., Paradela, C., Schillebeeckx, P., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Becvar, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Ferrer, F. J., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Macina, D., Manna, A., Marganiec, J., Martinez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Wright, T., and Zugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Cosmology and Extragalactic Astrophysics, Nuclear Experiment, Astrophysics::Galaxy Astrophysics
Abstract

Neutron destruction reactions of the cosmic gamma-ray emitter Al-26 are of importance to determine the amount of Al-26 ejected into our galaxy by supernova explosions and for Al-26 production in asymptotic giant branch stars. We performed a new measurement of the Al-26(n, alpha) reaction up to 160-keV neutron energy at the neutron time-of-flight facilities n_TOF at CERN and GELINA at EC-JRC. We provide strengths for ten resonances, six of them for the first time. We use our data to calculate astrophysical reactivities for stellar temperatures up to 0.7 GK. Our results resolve a discrepancy between the two previous direct measurements of this reaction, and indicate higher stellar destruction rates than the most recently recommended reactivity.

Published
2021
Full Text
View/download PDF

5. Destruction of the cosmic gamma-ray emitter Al-26 in massive stars: Study of the key Al-26(n, p) reaction

Author

Lederer-Woods, C., Woods, P. J., Davinson, T., Kahl, D., Lonsdale, S. J., Aberle, O., Amaducci, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Becvar, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Cristallo, S., Damone, L. A., Diakaki, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Ferrer, F. J., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Gawlik, A., Gilardoni, S., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kivel, N., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Macina, D., Manna, A., Marganiec, J., Martinez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Quesada, J. M., Radeck, D., Rauscher, T., Reifarth, R., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schumann, D., Sedyshev, P., Smith, A. G., Sosnin, N., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Wright, T., and Zugec, P.

Abstract

The 26Al(n,p)26Mg reaction is the key reaction impacting on the abundances of the cosmic γ-ray emitter 26Al produced in massive stars and impacts on the potential pollution of the early solar system with 26Al by asymptotic giant branch stars. We performed a measurement of the 26Al(n,p)26Mg cross section at the high-flux beam line EAR-2 at the n_TOF facility (CERN). We report resonance strengths for eleven resonances, nine being measured for the first time, while there is only one previous measurement for the other two. Our resonance strengths are significantly lower than the only previous values available. Our cross-section data range to 150 keV neutron energy, which is sufficient for a reliable determination of astrophysical reactivities up to 0.5 GK stellar temperature.

Published
2021

6. Measurement of the Ge-76(n, gamma) cross section at the n_TOF facility at CERN

Author

Gawlik-Ramiega, A., Lederer-Woods, C., Krticka, M., Valenta, S., Battino, U., Andrzejewski, J., Perkowski, J., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tattersall, A., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Nuclear Experiment
Abstract

The Ge-76(n, gamma) reaction has been measured at the n_TOF facility at CERN via the time-of-flight technique. Neutron capture cross sections on Ge-76 are of interest to a variety of low-background experiments, such as neutrinoless double beta decay searches, and to nuclear astrophysics. We have determined resonance capture kernels up to 52 keV neutron energy and used the new data to calculate Maxwellian-averaged neutron capture cross sections for k(B)T values of 5 to 100 keV.

Published
2021

7. Shape Changes in the Mirror Nuclei Kr-70 and Se-70

Author

Wimmer, K., Korten, W., Doornenbal, P., Arici, T., Aguilera, P., Algora, Alejandro, Ando, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., De Angelis, G., De France, G., Delaroche, J.P., Doherty, D.T., Gerl, J., Gernhäuser, R., Girod, M., Jenkins, D., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Libert, J., Lubos, D., Rodriguez, T. R., Rubio, B., Sahin, E., Saito, T.Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., Zielinska, M., RIKEN Nishina Center for Accelerator-Based Science, Science and Technology Facilities Council (UK), Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), and European Commission

Abstract

6 pags., 3 figs., 2 tabs., We studied the proton-rich T-z = -1 nucleus Kr-70 through inelastic scattering at intermediate energies in order to extract the reduced transition probability, B(E2; 0+ -> 2+). Comparison with the other members of the A = 70 isospin triplet, Br-70 and Se-70, studied in the same experiment, shows a 3 sigma deviation from the expected linearity of the electromagnetic matrix elements as a function of T-z. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei Kr-70 and Se-70 contrary to the model predictions., We would like to thank the RIKEN accelerator and BigRIPS teams for providing the high intensity beams. This work has been supported by UK STFC under Grants No. ST/L005727/1 and No. ST/P003885/1, the Spanish Ministerio de Economía y Competitividad under Grants No. FPA2011-24553 and No. FPA2014-52823-C2-1-P, the Program Severo Ochoa (SEV-2014-0398), and the Spanish MICINN under PGC2018-094583-B-I00. K. W. acknowledges the support from the Spanish Ministerio de Economía y Competitividad RYC-2017-22007. A. O. acknowledges the support from the European Research Council through the ERC Grant No. MINOS-258567

Published
2021

8. Shape Changes in the Mirror Nuclei Kr-70 and Se-70

Author

RIKEN Nishina Center for Accelerator-Based Science, Science and Technology Facilities Council (UK), Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), European Commission, Wimmer, K., Korten, W., Doornenbal, P., Arici, T., Aguilera, P., Algora, Alejandro, Ando, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., De Angelis, G., De France, G., Delaroche, J.P., Doherty, D.T., Gerl, J., Gernhäuser, R., Girod, M., Jenkins, D., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Libert, J., Lubos, D., Rodríguez, T. R., Rubio, Berta, Sahin, E., Saito, T.Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., Zielinska, M., RIKEN Nishina Center for Accelerator-Based Science, Science and Technology Facilities Council (UK), Ministerio de Economía y Competitividad (España), Ministerio de Ciencia e Innovación (España), European Commission, Wimmer, K., Korten, W., Doornenbal, P., Arici, T., Aguilera, P., Algora, Alejandro, Ando, T., Baba, H., Blank, B., Boso, A., Chen, S., Corsi, A., Davies, P., De Angelis, G., De France, G., Delaroche, J.P., Doherty, D.T., Gerl, J., Gernhäuser, R., Girod, M., Jenkins, D., Koyama, S., Motobayashi, T., Nagamine, S., Niikura, M., Obertelli, A., Libert, J., Lubos, D., Rodríguez, T. R., Rubio, Berta, Sahin, E., Saito, T.Y., Sakurai, H., Sinclair, L., Steppenbeck, D., Taniuchi, R., Wadsworth, R., and Zielinska, M.

Abstract

We studied the proton-rich T-z = -1 nucleus Kr-70 through inelastic scattering at intermediate energies in order to extract the reduced transition probability, B(E2; 0+ -> 2+). Comparison with the other members of the A = 70 isospin triplet, Br-70 and Se-70, studied in the same experiment, shows a 3 sigma deviation from the expected linearity of the electromagnetic matrix elements as a function of T-z. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei Kr-70 and Se-70 contrary to the model predictions.

Published
2021

9. First measurement of direct photoproduction of the a2(1320)0 meson on the proton

Author

Celentano, A., Battaglieri, M., De Vita, R., Marsicano, L., Mathieu, V., Pilloni, A., Szczepaniak, A., Adhikari, K. P., Adhikari, S., Amaryan, M. J., Angelini, G., Atac, H., Barion, L., Bedlinskiy, I., Benmokhtar, Fatiha, Bianconi, A., Biselli, A. S., Bossù, F., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Bulumulla, D., Burkert, V. D., Carman, D. S., Carvajal, J. C., Chatagnon, P., Chetry, T., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., Cruz-Torres, R., D'Angelo, A., Dashyan, N., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Gavalian, G., Gevorgyan, N., Girod, F. X., Glazier, D. I., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Hauenstein, F., Hayward, T. B., Heddle, D., Hicks, K., Hobart, A., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khachatryan, M., Khanal, A., Khandaker, M., Kim, A., Kim, C. W., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Leali, M., Lenisa, P., Livingston, K., Lucherini, V., MacGregor, I. J. D., Marchand, D., Markov, N., Mascagna, V., McCracken, M. E., McKinnon, B., Meziani, Z.-E., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Neupane, K., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Ripani, M., Ritman, J., Rizzo, A., Rosner, G., Rowley, J., Sabatié, F., Salgado, C., Schmidt, A., Schumacher, R. A., Shrestha, U., Sokan, D., Soto, O., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Tan, J. A., Tyler, N., Ungaro, M., Venturelli, L., Voskanyan, H., Voutier, E., Watts, D., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and CLAS

Subjects
Nuclear Theory, [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Hadronic Physics and QCD, Socio-culturale, FOS: Physical sciences, Regge, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], beam: energy, High Energy Physics - Experiment, Nuclear Theory (nucl-th), differential cross section: measured, High Energy Physics - Experiment (hep-ex), PE2_2, PE2_1, CLAS, mass spectrum: (pi0 eta), [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], angular distribution, photon p: exclusive reaction, Nuclear Experiment (nucl-ex), Nuclear Experiment, PE2_3, Nucleons, Mesons, Settore FIS/04, photon p: inelastic scattering, partial wave analysis, photon: energy, Photoproduction, meson: photoproduction, experimental results
Abstract

We present the first measurement of the exclusive reaction $\gamma p \rightarrow a_2(1320)^0 \, p$ in the photon energy range $3.5$-$5.5$ GeV and four-momentum transfer squared $0.2, Comment: Version accepted for publication in PRC, "Rapid Communications" section

Published
2020

10. Investigation of the $^{240}$Pu(n,f) reaction at the n_TOF/EAR2 facility in the 9 meV-6 MeV range

Author

n_TOF Collaboration, Stamatopoulos, A., Tsinganis, A., Colonna, N., Kokkoris, M., Vlastou, R., Diakaki, M., Žugec, P., Schillebeeckx, P., Gunsing, F., Sabaté-Gilarte, M., Barbagallo, M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barros, S., Bečvář, F., Beinrucker, C., Belloni, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Lo Meo, S., Calviño, F., Calviani, M., Cano-Ott, D., Cerutti, F., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Deo, K., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Frost, R. J. W., Furman, V., Göbel, K., García, A. R., Gheorghe, I., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Krtička, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lerendegui-Marco, J., Licata, M., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Palomo-Pinto, F. R., Paradela, C., Patronis, N., Pavlik, A., Perkowski, J., Plompen, A., Porras, J. I., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Saxena, A., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Suryanarayana, S. V., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Wallner, A., Warren, S., Weigand, M., Weiss, C., and Wright, T.

Subjects
Physics, ddc:530, Nuclear Experiment
Abstract

Background: Nuclear waste management is considered amongst the major challenges in the field of nuclear energy. A possible means of addressing this issue is waste transmutation in advanced nuclear systems, whose operation requires a fast neutron spectrum. In this regard, the accurate knowledge of neutron-induced reaction cross sections of several (minor) actinide isotopes is essential for design optimization and improvement of safety margins of such systems. One such case is $^{240}$Pu, due to its accumulation in spent nuclear fuel of thermal reactors and its usage in fast reactor fuel. The measurement of the $^{240}$Pu(n,f) cross section was previously attempted at the CERN n_TOF facility EAR1 measuring station using the time-of-flight technique. Due to the low amount of available material and the given flux at EAR1, the measurement had to last several months to achieve a sufficient statistical accuracy. This long duration led to detector deterioration due to the prolonged exposure to the high α activity of the fission foils, therefore the measurement could not be successfully completed. Purpose: It is aimed to determine whether it is feasible to study neutron-induced fission at n_TOF/EAR2 and provide data on the $^{240}$Pu(n,f) reaction in energy regions requested for applications. Methods: The study of the $^{240}$Pu(n,f) reaction was made at a new experimental area (EAR2) with a shorter flight path which delivered on average 30 times higher flux at fast neutron energies. This enabled the measurement to be performed much faster, thus limiting the exposure of the detectors to the intrinsic activity of the fission foils. The experimental setup was based on microbulk Micromegas detectors and the time-of-flight data were analyzed with an optimized pulse-shape analysis algorithm. Special attention was dedicated to the estimation of the non-negligible counting loss corrections with the development of a new methodology, and other corrections were estimated via Monte Carlo simulations of the experimental setup. Results: This new measurement of the $^{240}$Pu(n,f) cross section yielded data from 9 meV up to 6 MeV incident neutron energy and fission resonance kernels were extracted up to 10 keV. Conclusions: Neutron-induced fission of high activity samples can be successfully studied at the n_TOF/EAR2 facility at CERN covering a wide range of neutron energies, from thermal to a few MeV.

Published
2020

11. Exclusive π0p electroproduction off protons in the resonance region at photon virtualities 0.4 GeV2≤Q2≤1 GeV2 EXCLUSIVE π0p ELECTROPRODUCTION off ⋯ N. MARKOV et al

Author

Markov, N., Joo, K., Burkert, V. D., Mokeev, V. I., Smith, L. C., Ungaro, M., Adhikari, S., Amaryan, M. J., Angelini, G., Atac, H., Avakian, H., Ayerbe Gayoso, C., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Biselli, A. S., Bossu, F., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Carvajal, J. C., Celentano, A., Chatagnon, P., Chetry, T., Cole, P. L., Contalbrigo, M., Crede, V., Ciullo, G., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Evans, C., Filippi, A., Ghandilyan, Y., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Hattawy, M., Hayward, T. B., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., H. S., Jo, Keller, D., Khachatryan, M., Khanal, A., Khandaker, M., Kim, A., Kim, C. W., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Leali, M., Livingston, K., Macgregor, I. J. D., Marchand, D., Mascagna, V., Mckinnon, B., Mineeva, T., Mirazita, M., Nadel-Turonski, P., Nanda, S., Niccolai, S., Niculescu, G., Osipenko, M., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rowley, J., Sabatie, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Shrestha, U., Sokhan, D., Soto, O., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Tyler, N., Venturelli, L., Voskanyan, H., Voutier, E., Wang, R., Wei, X., Wood, M. H., and Zachariou, N.

Published
2020

12. Exclusive π0p electroproduction off protons in the resonance region at photon virtualities 0.4GeV2 ≤ Q2 ≤ 1GeV2

Author

Markov, N., Joo, K., Burkert, V. D., Mokeev, V. I., Smith, L. C., Ungaro, M., Adhikari, S., Amaryan, M. J., Angelini, G., Atac, H., Avakian, H., Ayerbe Gayoso, C., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benmokhtar, F., Biselli, A. S., Bossù, F., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Carvajal, J. C., Celentano, A., Chatagnon, P., Chetry, T., Cole, P. L., Contalbrigo, M., Crede, V., Ciullo, G., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Evans, C., Filippi, A., Ghandilyan, Y., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Hattawy, M., Hayward, T. B., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Keller, D., Khachatryan, M., Khanal, A., Khandaker, M., Kim, A., Kim, C. W., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Leali, M., Livingston, K., MacGregor, I. J. D., Marchand, D., Mascagna, V., McKinnon, B., Mineeva, T., Mirazita, M., Nadel-Turonski, P., Nanda, S., Niccolai, S., Niculescu, G., Osipenko, M., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rowley, J., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Shrestha, U., Sokhan, D., Soto, O., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Tyler, N., Venturelli, L., Voskanyan, H., Voutier, E., Wang, R., Wei, X., Wood, M. H., and Zachariou, N.

Subjects
QC
Abstract

The exclusive electroproduction process ep→e′p′π0 was measured in the range of photon virtualities Q2=0.4–1.0GeV2 and the invariant mass range of the pπ0 system of W=1.1–1.8 GeV. These kinematics are covered in exclusive π0 electroproduction off the proton with nearly complete angular coverage in the pπ0 center-of-mass system and with high statistical accuracy. Nearly 36 000 cross-section points were measured, and the structure functions σT+εσL,σLT, and σTT, were extracted via fitting the ϕπ0 dependence of the cross section. A Legendre polynomial expansion analysis demonstrates the sensitivity of our data to high-lying N* and Δ* resonances with M>1.6 GeV. As part of a broad effort to determine the electrocouplings of the N* and Δ* resonances using both single- and double-pion electroproduction, this dataset is crucial for the reliable extraction of the high-lying resonance electrocouplings from the combined isospin analysis of the Nπ and π+π−p channels.

Published
2020

13. Measurement of the ⁷⁰Ge(n, gamma) cross section up to 300 keV at the CERN n_TOF facility

Author

n_TOF Collaboration, Gawlik, A., Lederer-Woods, C., Andrzejewski, J., Battino, U., Ferreira, P., Gunsing, F., Heinitz, S., Krtička, M., Massimi, C., Mingrone, F., Perkowski, J., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bécares, V., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J. I., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Physics, Astrophysics::Solar and Stellar Astrophysics, ddc:530, Nuclear Experiment
Abstract

Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The (n,γ) cross section on 70Ge, which is mainly produced in the s process, was measured at the neutron time-of-flight facility n_TOF at CERN. Resonance capture kernels were determined up to 40 keV neutron energy and average cross sections up to 300 keV. Stellar cross sections were calculated from kT=5 keV to kT=100 keV and are in very good agreement with a previous measurement by Walter and Beer (1985) and recent evaluations. Average cross sections are in agreement with Walter and Beer (1985) over most of the neutron energy range covered, while they are systematically smaller for neutron energies above 150 keV. We have calculated isotopic abundances produced in s-process environments in a 25 solar mass star for two initial metallicities (below solar and close to solar). While the low metallicity model reproduces best the solar system germanium isotopic abundances, the close to solar model shows a good global match to solar system abundances in the range of mass numbers A=60–80.

Published
2019

14. Properties of γ-decaying isomers in the Sn 100 region populated in fragmentation of a Xe 124 beam

Author

Häfner, G., Moschner, K., Blazhev, A., Boutachkov, P., Davies, P. J., Wadsworth, R., Ameil, F., Baba, H., Bäck, T., Dewald, M., Doornenbal, P., Faestermann, T., Gengelbach, A., Gerl, J., Gernhaüser, R., Go, S., Górska, M., Grawe, H., Gregor, E., Hotaka, H., Isobe, T., Jenkins, D. G., Jolie, J., Jung, H. S., Kojouharov, I., Kurz, N., Lewitowicz, M., Lorusso, G., Lozeva, R., Merchan, E., Naqvi, F., Nishibata, H., Nishimura, D., Nishimura, S., Pietralla, N., Schaffner, H., Söderström, P. A., Steiger, K., Sumikama, T., Taprogge, J., Thöle, P., Watanbe, H., Warr, N., Werner, V., Xu, Z. Y., Yagi, A., Yoshinaga, K., Zhu, Y., RIKEN Nishina Center for Accelerator-Based Science, University of Tokyo, Federal Ministry of Education and Research (Germany), Department of Energy (US), Japan Society for the Promotion of Science, Science and Technology Facilities Council (UK), and Bonn-Cologne Graduate School of Physics and Astronomy

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

9 pags., 6 figs., 2 tabs., A systematic study was performed of microsecond γ-decaying isomers around Sn100 produced in a fragmentation reaction of a Xe124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh92 and Ag96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction., This work was carried out at the RIBF operated by the RIKEN Nishina Center, RIKEN and CNS, University of Tokyo. We acknowledge the EUROBALL Owners Committee for the loan of germanium detectors and the PreSpec Collaboration for the readout electronics of cluster detectors. This work was partly supported by the German BMBF under Contracts No. 05P12PKFNE and No. 05P15PKFNA, the U.S. Department of Energy under Grant No. DE-FG02-91ER40609, JSPS KAKENHI Grant No. KAKENHI 25247045, and the UK STFC under Grants No. ST/J000124/1, No. ST/L005727/1, and No. ST/P003885/1. G.H. was supported by the Bonn-Cologne Graduate School of Physics and Astronomy.

Published
2019

15. Measurement of the 2+→0+ ground-state transition in the β decay of 20F

Author

Kirsebom, O. S., Hukkanen, M., Kankainen, A., Trzaska, W. H., Strömberg, D. F., Martínez-Pinedo, G., Andersen, K., Bodewits, E., Brown, B. A., Canete, L., Cederkäll, J., Enqvist, T., Eronen, T., Fynbo, H. O. U., Geldhof, S., de Groote, R., Jenkins, D. G., Jokinen, A., Joshi, P., Khanam, A., Kostensalo, J., Kuusiniemi, P., Langanke, K., Moore, I., Munch, M., Nesterenko, D. A., Ovejas, J. D., Penttilä, H., Pohjalainen, I., Reponen, M., Rinta-Antila, S., Riisager, K., de Roubin, A., Schotanus, P., Srivastava, P. C., Suhonen, J., Swartz, J. A., Tengblad, O., Vilen, M., Vínals, S., and Äystö, J.

Subjects
High Energy Physics::Experiment, ydinfysiikka
Abstract

We report the first detection of the second-forbidden, nonunique, 2+→0+, ground-state transition in the β decay of 20F. A low-energy, mass-separated 20F+ beam produced at the IGISOL facility in Jyväskylä, Finland, was implanted in a thin carbon foil and the β spectrum measured using a magnetic transporter and a plastic-scintillator detector. The β-decay branching ratio inferred from the measurement is bβ=[0.41±0.08(stat)±0.07(sys)]×10−5 corresponding to logft=10.89(11), making this one of the strongest second-forbidden, nonunique β transitions ever measured. The experimental result is supported by shell-model calculations and has significant implications for the final evolution of stars that develop degenerate oxygen-neon cores. Using the new experimental data, we argue that the astrophysical electron-capture rate on 20Ne is now known to within better than 25% at the relevant temperatures and densities. peerReviewed

Published
2019

16. Measurement of the Ge-70(n, gamma) cross section up to 300 keV at the CERN n_TOF facility

Author

Gawlik, A., Lederer-Woods, C., Andrzejewski, J., Battino, U., Ferreira, P., Gunsing, F., Heinitz, S., Krticka, M., Massimi, C., Mingrone, F., Perkowski, J., Reifarth, R., Tattersall, A., Valenta, S., Weiss, C., Aberle, O., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becares, V., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Knapova, I., Kokkoris, M., Leal-Cidoncha, E., Leeb, H., Lerendegui-Marco, J., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martinez, T., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Porras, J., Praena, J., Quesada, J. M., Rajeev, K., Rauscher, T., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

Subjects
Astrophysics::High Energy Astrophysical Phenomena, Astrophysics::Solar and Stellar Astrophysics, Nuclear Experiment
Abstract

Neutron capture data on intermediate mass nuclei are of key importance to nucleosynthesis in the weak component of the slow neutron capture processes, which occurs in massive stars. The (n,gamma) cross section on Ge-70, which is mainly produced in the s process, was measured at the neutron time-of-flight facility n_TOF at CERN. Resonance capture kernels were determined up to 40 keV neutron energy and average cross sections up to 300 keV. Stellar cross sections were calculated from kT = 5 keV to kT = 100 keV and are in very good agreement with a previous measurement by Walter and Beer (1985) and recent evaluations. Average cross sections are in agreement with Walter and Beer (1985) over most of the neutron energy range covered, while they are systematically smaller for neutron energies above 150 keV. We have calculated isotopic abundances produced in s-process environments in a 25 solar mass star for two initial metallicities (below solar and close to solar). While the low metallicity model reproduces best the solar system germanium isotopic abundances, the close to solar model shows a good global match to solar system abundances in the range of mass numbers A = 60-80.

Published
2019

17. Shape coexistence in ¹⁷⁸Hg

Author

Mueller-Gatermann, C. (C.), Dewald, A. (A.), Fransen, C. (C.), Auranen, K. (K.), Badran, H. (H.), Beckers, M. (M.), Blazhev, A. (A.), Braunroth, T. (T.), Cullen, D. M. (D. M.), Fruet, G. (G.), Goldkuhle, A. (A.), Grahn, T. (T.), Greenlees, P. T. (P. T.), Herzan, A. (A.), Jakobsson, U. (U.), Jenkins, D. (D.), Jolie, J. (J.), Julin, R. (R.), Juutinen, S. (S.), Konki, J. (J.), Leino, M. (M.), Litzinger, J. (J.), Nomura, K. (K.), Pakarinen, J. (J.), Peura, P. (P.), Procter, M. G. (M. G.), Rahkila, P. (P.), Ruotsalainen, P. (P.), Sandzelius, M. (M.), Saren, J. (J.), Scholey, C. (C.), Sorri, J. (J.), Stolze, S. (S.), Taylor, M. J. (M. J.), Uusitalo, J. (J.), Zell, K. O. (K. O.), Mueller-Gatermann, C. (C.), Dewald, A. (A.), Fransen, C. (C.), Auranen, K. (K.), Badran, H. (H.), Beckers, M. (M.), Blazhev, A. (A.), Braunroth, T. (T.), Cullen, D. M. (D. M.), Fruet, G. (G.), Goldkuhle, A. (A.), Grahn, T. (T.), Greenlees, P. T. (P. T.), Herzan, A. (A.), Jakobsson, U. (U.), Jenkins, D. (D.), Jolie, J. (J.), Julin, R. (R.), Juutinen, S. (S.), Konki, J. (J.), Leino, M. (M.), Litzinger, J. (J.), Nomura, K. (K.), Pakarinen, J. (J.), Peura, P. (P.), Procter, M. G. (M. G.), Rahkila, P. (P.), Ruotsalainen, P. (P.), Sandzelius, M. (M.), Saren, J. (J.), Scholey, C. (C.), Sorri, J. (J.), Stolze, S. (S.), Taylor, M. J. (M. J.), Uusitalo, J. (J.), and Zell, K. O. (K. O.)

Abstract

Lifetime measurements of excited states in ¹⁷⁸Hg have been performed using the ¹⁰³Rh(⁷⁸Kr,p2n) reaction at a beam energy of 354 MeV. The recoil-decay tagging (RDT) technique was applied to select the ¹⁷⁸Hg nuclei and associate the prompt γ rays with the correlated characteristic ground-state α decay. Lifetimes of the four lowest yrast states of ¹⁷⁸Hg have been determined using the recoil distance Doppler-shift (RDDS) method. The experimental data are compared to theoretical predictions with focus on shape coexistence. The results confirm the shift of the deformed prolate structures to higher lying states but also indicate their increasing deformation with decreasing neutron number.

Published
2019

18. Beam-target helicity asymmetry E in K0Λ and K0Σ0 photoproduction on the neutron

Author

Ho, D. H., Schumacher, R. A., D'Angelo, A., Deur, A., Fleming, J., Hanretty, C., Kageya, T., Klein, F. J., Klempt, E., Lowry, M. M., Lu, H., Nikonov, V. A., Peng, P., Sandorfi, A. M., Sarantsev, A. V., Strakovsky, I. I., Walford, N. K., Wei, X., Workman, R. L., Adhikari, K. P., Adhikari, S., Adikaram, D., Akbar, Z., Ball, J., Barion, L., Bashkanov, M., Bass, C. D., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Boiarinov, S., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chatagnon, P., Chetry, T., Ciullo, G., Clary, B. A., Cole, P., Collins, P., Contalbrigo, M., Crede, V., De Vita, R., Defurne, M., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, M., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fradi, A., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Laine, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Marchand, D., Markov, N., Mayer, M., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R.A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., O'Connell, T., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Rehfuss, M., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Watts, D. P., Weinstein, L. B., Whisnant, C. S., Wood, M. H., Zachariou, N., Zhang, J., Zhao, Z. W., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Socio-culturale, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We report the first measurements of the E beam-target helicity asymmetry for the →γ→n→K0Λ and K0Σ0 channels in the energy range 1.70≤W≤2.34 GeV. The CLAS system at Jefferson Lab uses a circularly polarized photon beam and a target consisting of longitudinally polarized solid molecular hydrogen deuteride with low background contamination for the measurements. The multivariate analysis method boosted decision trees is used to isolate the reactions of interest. Comparisons with predictions from the KaonMAID, SAID, and Bonn-Gatchina models are presented. These results will help separate the isospin I=0 and I=1 photocoupling transition amplitudes in pseudoscalar meson photoproduction.

Published
2018

19. Center of mass motion of short-range correlated nucleon pairs studied via the A(e,e'pp) reaction

Author

Cohen, E O, Hen, O, Piasetzky, E, Weinstein, L B, Duer, M, Schmidt, A, Korover, I, Hakobyan, H, Adhikari, S, Akbar, Z, Amaryan, M J, Avakian, H, Ball, J, Barion, L, Battaglieri, M, Beck, A, Bedlinskiy, I, Biselli, A S, Boiarinov, S, Briscoe, W, Burkert, V D, Cao, F, Carman, D S, Celentano, A, Charles, G, Chatagnon, Pierre, Chetry, T, Ciullo, G, Clary, Brandon A, Contalbrigo, M, Crede, V, Cruz Torres, R, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Defurne, M, Deur, A, Diehl, S, Djalali, C, Dupre, R, Egiyan, H, Ehrhart, Mathieu, El Alaoui, A, Fassi, L El, Eugenio, P, Fedotov, G, Fersch, R, Filippi, A, Ghandilyan, Y, Giovanetti, K L, Girod, F X, Golovatch, E, Gothe, R W, Griffioen, K A, Hafidi, K, Harrison, N, Hauenstein, F, Heddle, D, Hicks, K, Holtrop, M, Ireland, D.G., Ishkhanov, B S, Isupov, E L, Jenkins, D, Jo, H S, Johnston, S, Kabir, M L, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, F J, Kubarovsky, V, Kuhn, S E, Lanza, L, Lenisa, P, Livingston, K., MacGregor, I.J.D., Marchand, D, McKinnon, B., Mey-Tal Beck, S, Meyer, C A, Mirazita, M, Mokeev, V, Montgomery, R.A., Movsisyan, A, Munoz Camacho, C, Mustapha, B, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Osipenko, M, Ostrovidov, A I, Paolone, M, Paremuzyan, R, Pasyuk, E, Pogorelko, O, Price, J W, Prok, Y, Protopopescu, D., Ripani, M, Riser, D, Rizzo, A, Rosner, G., Rossi, P, Sabatié, F, Schmookler, B A, Schumacher, R A, Sharabian, Y G, Sokhan, D., Sparveris, N, Stepanyan, S, Strauch, S, Taiuti, M, Tan, J A, Ungaro, M, Voskanyan, H, Voutier, E, Wang, R, Watts, D P, Wei, X, Wood, M H, Zachariou, N, Zhang, J, Zheng, X, and Zhao, Z W

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than the Fermi momentum (k_{F}). A fundamental characteristic of SRC pairs is having large relative momenta as compared to k_{F}, and smaller center of mass (c.m.) which indicates a small separation distance between the nucleons in the pair. Determining the c.m. momentum distribution of SRC pairs is essential for understanding their formation process. We report here on the extraction of the c.m. motion of proton-proton (pp) SRC pairs in carbon and, for the first time in heavier and ansymetric nuclei: aluminum, iron, and lead, from measurements of the A(e,e^{'}pp) reaction. We find that the pair c.m. motion for these nuclei can be described by a three-dimensional Gaussian with a narrow width ranging from 140 to 170 MeV/c, approximately consistent with the sum of two mean-field nucleon momenta. Comparison with calculations appears to show that the SRC pairs are formed from mean-field nucleons in specific quantum states.

Published
2018

20. Measurements of the γvp→p′π+π- cross section with the CLAS detector for 0.4 GeV2<Q2<1.0 GeV2 and 1.3 GeV<W<1.825 GeV

Author

Fedotov, Gv, Skorodumina, Ia, Burkert, Vd, Gothe, Rw, Hicks, K, Mokeev, Vi, Adhikari, S, Armstrong, Wr, Avakian, H, Ball, J, Balossino, I, Barion, L, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, As, Boiarinov, S, Briscoe, Wj, Brooks, Wk, Carman, Ds, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clary, Ba, Cole, Pl, Contalbrigo, M, Cortes, O, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Defurne, M, Deur, A, Djalali, C, Dupre, R, Egiyan, H, Fassi, Le, Eugenio, P, Fersch, R, Gavalian, G, Ghandilyan, Y, Gilfoyle, Gp, Girod, Fx, Golovatch, E, Griffioen, Ka, Guo, L, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Holtrop, M, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, H. S., J, Johnston, S, Joosten, S, Kabir, Ml, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Kuleshov, Sv, Lanza, L, Lenisa, P, Livingston, K, Macgregor, Ijd, Markov, N, Mckinnon, B, Mineeva, T, Montgomery, Ra, Camacho, Cm, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Osipenko, M, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Pogorelko, O, Price, Jw, Procureur, S, Prok, Y, Protopopescu, D, Ripani, M, Riser, D, Ritchie, Bg, Rizzo, A, Sabatié, F, Salgado, C, Schumacher, Ra, Sharabian, Yg, Smith, Gd, Sober, Di, Sokhan, D, Sparveris, N, Strakovsky, Ii, Strauch, S, Taiuti, M, Tan, Ja, Tyler, N, Ungaro, M, Voskanyan, H, Voutier, E, Wei, X, Wood, Mh, Zachariou, N, Zhang, J, and Zhao, Zw

Subjects
Nuclear and High Energy Physics, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2018

21. Measurements of the γvp→p′π+π− cross section with the CLAS detector for 0.4GeV2 < Q2 < 1.0GeV2 and 1.3GeV < W < 1.825GeV

Author

Fedotov, G. V., Skorodumina, Iu. A., Burkert, V. D., Gothe, R. W., Hicks, K., Mokeev, V. I., Adhikari, S., Armstrong, Whitney R., Avakian, H., Ball, J., Balossino, I., Barion, L., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clary, Brandon A., Cole, P. L., Contalbrigo, M., Cortes, O., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Djalali, C., Dupre, R., Egiyan, H., Fassi, L. El, Eugenio, P., Fersch, R., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Girod, F. X., Golovatch, E., Griffioen, K. A., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Holtrop, M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Joosten, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Mineeva, T., Montgomery, R. A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Ritchie, B. G., Rizzo, A., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Tyler, N., Ungaro, M., Voskanyan, H., Voutier, E., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., and Zhao, Z. W.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

New results on the single-differential and fully integrated cross sections for the process γvp → p\ud π+π− are\ud presented. The experimental data were collected with the CLAS detector at Jefferson Laboratory. Measurements\ud were carried out in the kinematic region of the reaction invariant mass W from 1.3 to 1.825 GeV and the photon\ud virtuality Q2 from 0.4 to 1.0 GeV2\ud . The cross sections were obtained in narrow Q2 bins (0.05 GeV2\ud ) with the\ud smallest statistical uncertainties achieved in double-pion electroproduction experiments to date. The results were\ud found to be in agreement with previously available data where they overlap. A preliminary interpretation of\ud the extracted cross sections, which was based on a phenomenological meson-baryon reaction model, revealed\ud substantial relative contributions from nucleon resonances. The data offer promising prospects to improve\ud knowledge on the Q2 evolution of the electrocouplings of most resonances with masses up to ∼1.8 GeV.

Published
2018

22. Measurement of the beam asymmetry Σ and the target asymmetry T in the photoproduction of ω mesons off the proton using CLAS at Jefferson Laboratory

Author

Roy, P., Akbar, Z., Park, S., Crede, V., Anisovich, A. V., Denisenko, I., Klempt, E., Nikonov, V. A., Sarantsev, A. V., Adhikari, K. P., Adhikari, S., Anefalos Pereira, S., Ball, J., Balossino, I., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brock, J., Brooks, W. K., Burkert, V. D., Carlin, C., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clary, B. A., Cole, P. L., Contalbrigo, M., D'Angelo, A., Dashyan, N., De Vita, R., Deur, A., Djalali, C., Dugger, M., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Filippi, A., Fradi, A., Gavalian, G., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I.J.D., Markov, N., Mayer, M., McCracken, M. E., McKinnon, B., Meekins, D. G., Meyer, C. A., Meziani, Z. E., Mineeva, T., Mokeev, V., Montgomery, R.A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, E., Phelps, W., Pierce, J. J., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Ritchie, B. G., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G.D., Sober, D. I., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tan, J. A., Torayev, B., Ungaro, M., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., and Zhao, Z. W.

Subjects
Nuclear and High Energy Physics, Nuclear Theory, Socio-culturale, High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

The photoproduction of ω mesons off the proton has been studied in the reaction γp → p ω using the CEBAF\ud Large Acceptance Spectrometer (CLAS) and the frozen-spin target in Hall B at the Thomas Jefferson National\ud Accelerator Facility. For the first time, the target asymmetry T has been measured in photoproduction from the\ud decay ω → π+π−π0, using a transversely polarized target with energies ranging from just above the reaction\ud threshold up to 2.8 GeV. Significant nonzero values are observed for these asymmetries, reaching about 30–40%\ud in the third-resonance region. New measurements for the photon-beam asymmetry Σ are also presented, which\ud agree well with previous CLAS results and extend the world database up to 2.1 GeV. These data and additional\ud ω photoproduction observables from CLAS were included in a partial-wave analysis within the Bonn-Gatchina\ud framework. Significant contributions from s-channel resonance production were found in addition to t-channel\ud exchange processes.

Published
2018

23. Measurement and resonance analysis of the S-33(n,alpha)Si-30 cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV

Author

Praena, J., Sabate-Gilarte, M., Porras, I., Quesada, J. M., Altstadt, S., Andrzejewski, J., Audouin, L., Becares, V., Barbagallo, M., Becvar, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calvino, F., Calviani, M., Cano-Ott, D., Carrapico, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Duran, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Goebel, K., Gomez-Hornillos, M. B., Ganesan, S., Garcia, A. R., Giubrone, G., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krticka, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tarrio, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and Zugec, P.

Abstract

The (33)(n , alpha)Si-30 cross section has been measured at the neutron time-of-flight (n_TOF) facility at CERN in the neutron energy range from 10 to 300 keV relative to the B-10(n, alpha)(7) Li cross-section standard. Both reactions were measured simultaneously with a set of micromegas detectors. The flight path of 185 m has allowed us to obtain the cross section with high-energy resolution. An accurate description of the resonances has been performed by means of the multilevel multichannel R-matrix code SAMMY. The results show a significantly higher area of the biggest resonance (13.45 keV) than the unique high-resolution (n , alpha) measurement. The new parametrization of the 13.45-keV resonance is similar to that of the unique transmission measurement. This resonance is a matter of research in neutron-capture therapy. The S-33(n, alpha)Si-30 cross section has been studied in previous works because of its role in the production of S-36 in stars, which is currently overproduced in stellar models compared to observations.

Published
2018

24. Measurement and analysis of the Am-241 neutron capture cross section at the n_TOF facility at CERN

Author

Mendoza, E., Cano-Ott, D., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Balibrea, J., Becares, V., Barbagallo, M., Becvar, F., Belloni, F., Berthier, B., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calvino, F., Calviani, M., Carrapico, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Diakaki, M., Dillmann, I., Domingo-Pardo, C., Duran, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Gomez-Hornillos, M. B., Ganesan, S., Garcia, A. R., Giubrone, G., Goncalves, I. F., Gonzalez, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heftrich, T., Heinitz, S., Hernandez-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Koehler, P., Kokkoris, M., Kroll, J., Krticka, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Licata, M., Lopez, D., Losito, R., Manousos, A., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Roman, F., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeno-Saldiyia, A., Tarrio, D., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Versaci, R., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and Zugec, P.

Abstract

The Am-241(n, gamma) cross section has been measured at the n_TOF facility at CERN with the n_TOF BaF2 Total Absorption Calorimeter in the energy range between 0.2 eV and 10 keV. Our results are analyzed as resolved resonances up to 700 eV, allowing a more detailed description of the cross section than in the current evaluations, which contain resolved resonances only up to 150-160 eV. The cross section in the unresolved resonance region is perfectly consistent with the predictions based on the average resonance parameters deduced from the resolved resonances, thus obtaining a consistent description of the cross section in the full neutron energy range under study. Below 20 eV, our results are in reasonable agreement with JEFF-3.2 as well as with the most recent direct measurements of the resonance integral, and differ up to 20-30% with other experimental data. Between 20 eV and 1 keV, the disagreement with other experimental data and evaluations gradually decreases, in general, with the neutron energy. Above 1 keV, we find compatible results with previously existing values.

Published
2018

25. Radiative neutron capture on Pu-242 in the resonance region at the CERN n_TOF-EAR1 facility

Author

Lerendegui-Marco, J., Guerrero, C., Mendoza, E., Quesada, J. M., Eberhardt, K., Junghans, A. R., Krticka, M., Aberle, O., Andrzejewski, J., Audouin, L., Becares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Becvar, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamano, M., Calvino, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortes, G., Cortes-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Duran, I., Fernandez-Dominguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Goebel, K., Garcia, A. R., Gawlik, A., Glodariu, T., Goncalves, I. F., Gonzalez-Romero, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Kaeppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martinez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeno-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Zugec, P.

Abstract

The spent fuel of current nuclear reactors contains fissile plutonium isotopes that can be combined with uranium to make mixed oxide (MOX) fuel. In this way the Pu from spent fuel is used in a new reactor cycle, contributing to the long-term sustainability of nuclear energy. However, an extensive use of MOX fuels, in particular in fast reactors, requires more accurate capture and fission cross sections for some Pu isotopes. In the case of Pu-242 there are sizable discrepancies among the existing capture cross-section measurements included in the evaluations (all from the 1970s) resulting in an uncertainty as high as 35% in the fast energy region. Moreover, postirradiation experiments evaluated with JEFF-3.1 indicate an overestimation of 14% in the capture cross section in the fast neutron energy region. In this context, the Nuclear Energy Agency (NEA) requested an accuracy of 8% in this cross section in the energy region between 500 meV and 500 keV. This paper presents a new time-of-flight capture measurement on Pu-242 carried out at n_TOF-EAR1 (CERN), focusing on the analysis and statistical properties of the resonance region, below 4 keV. The Pu-242(n, gamma) reaction on a sample containing 95(4) mg enriched to 99.959% was measured with an array of four C6D6 detectors and applying the total energy detection technique. The high neutron energy resolution of n_TOF-EAR1 and the good statistics accumulated have allowed us to extend the resonance analysis up to 4 keV, obtaining new individual and average resonance parameters from a capture cross section featuring a systematic uncertainty of 5%, fulfilling the request of the NEA.

Published
2018

26. Exclusive photoproduction of π0 up to large values of Mandelstam variables s, t, and u with CLAS

Author

Kunkel, M. C., Amaryan, M. J., Strakovsky, I. I., Ritman, J., Goldstein, G. R., Adhikari, K. P., Adhikari, S., Avakian, H., Ball, J., Balossino, I., Barion, L., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Bultmann, S., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Degtyarenko, P. V., Defurne, M., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Fradi, A., Gavalian, G., Ghandilyan, Y., Ghosh, S., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Glazier, D. I., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guo, L., Guidal, M., Hafidi, K., Hakobyan, H., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hyde, C. E., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F., Kubarovsky, V., Kuhn, S. E., Laget, J. M., Lanza, L., Lenisa, P., Lersch, D., Livingston, K., Macgregor, I. J. D., Markov, N., Mbianda Njencheu, G., Mckinnon, B., Mineeva, T., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Park, K., Pasyuk, E., Payette, D., Phelps, W., Pogorelko, O., Poudel, J., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Ripani, M., Ritchie, B. G., Rizzo, A., Rosner, G., Roy, A., Sabatie, F., Salgado, C., Schadmand, S., Schumacher, R. A., Sharabian, Y. G., Skorodumina, I., Stepanyan, S., Sokhan, D., Sober, D. I., Sparveris, N., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Watts, D. P., Weinstein, L., Wei, X., Weygand, D. P., Zachariou, N., Zhang, J., and Zhao, Z. W.

Published
2018

27. Radiative neutron capture on ²⁴²Pu in the resonance region at the CERN n_TOF-EAR1 facility

Author

n_TOF Collaboration, Lerendegui-Marco, J., Guerrero, C., Mendoza, E., Quesada, J. M., Eberhardt, K., Junghans, A. R., Krtička, M., Aberle, O., Andrzejewski, J., Audouin, L., Bécares, V., Bacak, M., Balibrea, J., Barbagallo, M., Barros, S., Bečvář, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Damone, L. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Furman, V., Göbel, K., García, A. R., Gawlik, A., Glodariu, T., Gonçalves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Gunsing, F., Harada, H., Heftrich, T., Heinitz, S., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Katabuchi, T., Kavrigin, P., Ketlerov, V., Khryachkov, V., Kimura, A., Kivel, N., Kokkoris, M., Leal-Cidoncha, E., Lederer, C., Leeb, H., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Matteucci, F., Maugeri, E. A., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Musumarra, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, J. I., Praena, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P. C., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weigand, M., Weiss, C., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Subjects
Physics, ddc:530
Published
2018

28. Measurement of the helicity asymmetry E in ω → π+π−π0 photoproduction

Author

Akbar, Z., Roy, P., Park, S., Crede, V., Anisovich, A. V., Denisenko, I., Klempt, E., Nikonov, V. A., Sarantsev, A. V., Adhikari, K. P., Adhikari, S., Amaryan, M. J., Anefalos Pereira, S., Avakian, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Boiarinov, S., Briscoe, W. J., Brock, J., Brooks, W. K., Burkert, V. D., Cao, F. T., Carlin, C., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Cortes, O., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Fassi, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Fradi, A., Garcon, M., Gevorgyan, N., Giovanetti, K. L., Girod, F. X., Gleason, C., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Hollis, G., Holtrop, M., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lanza, L., Livingston, K., MacGregor, I.J.D., Markov, N., McKinnon, B., Meekins, D. G., Mineeva, T., Mokeev, V., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Ritchie, B. G., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sober, D. I., Sokhan, D., Sparveris, N., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Ungaro, M., Voskanyan, H., Voutier, E., Wei, X., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., and Zhao, Z. W.

Subjects
Nuclear Experiment
Abstract

The double-polarization observable E was studied for the reaction γp → pω using the CEBAF Large\ud Acceptance Spectrometer (CLAS) in Hall B at the Thomas Jefferson National Accelerator Facility and the\ud longitudinally polarized frozen-spin target (FROST). The observable was measured from the charged decay\ud mode of the meson, ω → π+π−π0, using a circularly polarized tagged-photon beam with energies ranging\ud from the ω threshold at 1.1 to 2.3 GeV. A partial-wave analysis within the Bonn-Gatchina framework found\ud dominant contributions from the 3/2+ partial wave near threshold, which is identified with the subthreshold\ud N(1720) 3/2+ nucleon resonance. To describe the entire data set, which consisted of ω differential cross sections\ud and a large variety of polarization observables, further contributions from other nucleon resonances were found\ud to be necessary. With respect to nonresonant mechanisms, π exchange in the t channel was found to remain small\ud across the analyzed energy range, while Pomeron t-channel exchange gradually grew from the reaction threshold\ud to dominate all other contributions above W ≈ 2 GeV.

Published
2017

29. Determination of the proton spin structure functions for 0.05 < Q2 < 5GeV2 using CLAS

Author

Fersch, R. G., Guler, N., Bosted, P., Deur, A., Griffioen, K., Keith, C., Kuhn, S. E., Minehart, R., Prok, Y., Adhikari, K. P., Adhikari, S., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, I., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pierce, J., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Zachariou, N., and Zhang, J.

Subjects
High Energy Physics::Experiment, Nuclear Experiment
Abstract

We present the results of our final analysis of the full data set of \ud g\ud p\ud 1\ud (\ud Q\ud 2\ud )\ud , the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (\ud 15\ud NH\ud 3\ud dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries \ud A\ud p\ud 1\ud and \ud A\ud p\ud 2\ud and spin structure functions \ud g\ud p\ud 1\ud and \ud g\ud p\ud 2\ud over a wide kinematic range (0.05 \ud GeV\ud 2\ud

Published
2017

30. Measurement and analysis of the 241Am neutron capture cross section at the n_TOF facility at CERN

Author

Mendoza, E., Cano-Ott, D., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Balibrea, J., Bécares, V., Barbagallo, M., Be\ifmmode \checkc\else č\fivá\ifmmode \checkr\else Ŗ\fi, F., Belloni, F., Berthier, B., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Carrapi\ifmmode \mboxç\else ç\fio, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Dillmann, I., Domingo-Pardo, C., Durán, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gon\ifmmode \mboxç\else ç\fialves, I. F., González, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Koehler, P., Kokkoris, M., Kroll, J., Krti\ifmmode \checkc\else č\fika, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Licata, M., López, D., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Roman, F., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tarrio, Diego, Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Versaci, R., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., \ifmmode \checkZ\else \vZ\fiugec, P., Mendoza, E., Cano-Ott, D., Altstadt, S., Andriamonje, S., Andrzejewski, J., Audouin, L., Balibrea, J., Bécares, V., Barbagallo, M., Be\ifmmode \checkc\else č\fivá\ifmmode \checkr\else Ŗ\fi, F., Belloni, F., Berthier, B., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Carrapi\ifmmode \mboxç\else ç\fio, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Dillmann, I., Domingo-Pardo, C., Durán, I., Dzysiuk, N., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gon\ifmmode \mboxç\else ç\fialves, I. F., González, E., Goverdovski, A., Gramegna, F., Griesmayer, E., Guerrero, C., Gunsing, F., Gurusamy, P., Heftrich, T., Heinitz, S., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Koehler, P., Kokkoris, M., Kroll, J., Krti\ifmmode \checkc\else č\fika, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Licata, M., López, D., Losito, R., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Praena, J., Quesada, J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Roman, F., Rubbia, C., Ryan, J. A., Sabaté-Gilarte, M., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tarrio, Diego, Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Versaci, R., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and \ifmmode \checkZ\else \vZ\fiugec, P.

Published
2018
Full Text
View/download PDF

31. Measurement and resonance analysis of the 33S(n,alpha)30Si cross section at the CERN n_TOF facility in the energy region from 10 to 300 keV

Author

Praena, J., Sabaté-Gilarte, M., Porras, I., Quesada, J. M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Be\ifmmode \checkc\else č\fivá\ifmmode \checkr\else Ŗ\fi, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapi\ifmmode \mboxç\else ç\fio, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gon\ifmmode \mboxç\else ç\fialves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krti\ifmmode \checkc\else č\fika, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tarrio, Diego, Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., \ifmmode \checkZ\else \vZ\fiugec, P., Praena, J., Sabaté-Gilarte, M., Porras, I., Quesada, J. M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Be\ifmmode \checkc\else č\fivá\ifmmode \checkr\else Ŗ\fi, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviño, F., Calviani, M., Cano-Ott, D., Carrapi\ifmmode \mboxç\else ç\fio, C., Cerutti, F., Chiaveri, E., Chin, M., Colonna, N., Cortés, G., Cortés-Giraldo, M. A., Diakaki, M., Dietz, M., Domingo-Pardo, C., Dressler, R., Durán, I., Eleftheriadis, C., Ferrari, A., Fraval, K., Furman, V., Göbel, K., Gómez-Hornillos, M. B., Ganesan, S., García, A. R., Giubrone, G., Gon\ifmmode \mboxç\else ç\fialves, I. F., González-Romero, E., Goverdovski, A., Griesmayer, E., Guerrero, C., Gunsing, F., Heftrich, T., Hernández-Prieto, A., Heyse, J., Jenkins, D. G., Jericha, E., Käppeler, F., Kadi, Y., Karadimos, D., Katabuchi, T., Ketlerov, V., Khryachkov, V., Kivel, N., Koehler, P., Kokkoris, M., Kroll, J., Krti\ifmmode \checkc\else č\fika, M., Lampoudis, C., Langer, C., Leal-Cidoncha, E., Lederer-Woods, C., Leeb, H., Leong, L. S., Lerendegui-Marco, J., Losito, R., Mallick, A., Manousos, A., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mendoza, E., Mengoni, A., Milazzo, P. M., Mingrone, F., Mirea, M., Mondelaers, W., Paradela, C., Pavlik, A., Perkowski, J., Plompen, A. J. M., Rauscher, T., Reifarth, R., Riego-Perez, A., Robles, M., Rubbia, C., Ryan, J. A., Sarmento, R., Saxena, A., Schillebeeckx, P., Schmidt, S., Schumann, D., Sedyshev, P., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tarrio, Diego, Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vermeulen, M. J., Vlachoudis, V., Vlastou, R., Wallner, A., Ware, T., Weigand, M., Weiss, C., Wright, T., and \ifmmode \checkZ\else \vZ\fiugec, P.

Published
2018
Full Text
View/download PDF

32. Center of Mass Motion of Short-Range Correlated Nucleon Pairs studied via the A (e, e ′ pp) Reaction

Author

Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, Hen, Or, Cruz Torres, Reynier, Beck, Sharon, Beck, Arie, Schmookler, Barak Abraham, Cohen, E. O., Piasetzky, E., Weinstein, L. B., Duer, M., Schmidt, A., Korover, I., Hakobyan, H., Adhikari, S., Akbar, Z., Amaryan, M. J., Avakian, H., Ball, J., Barion, L., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Charles, G., Chatagnon, Pierre, Chetry, T., Ciullo, G., Clary, Brandon A., Contalbrigo, M., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, Mathieu, El Alaoui, A., Fassi, L. El, Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Hafidi, K., Harrison, N., Hauenstein, F., Heddle, D., Hicks, K., Holtrop, M., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Marchand, D., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Mustapha, B., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Schumacher, R. A., Sharabian, Y. G., Sokhan, D., Sparveris, N., Stepanyan, S., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., Zheng, X., Zhao, Z. W., Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, Hen, Or, Cruz Torres, Reynier, Beck, Sharon, Beck, Arie, Schmookler, Barak Abraham, Cohen, E. O., Piasetzky, E., Weinstein, L. B., Duer, M., Schmidt, A., Korover, I., Hakobyan, H., Adhikari, S., Akbar, Z., Amaryan, M. J., Avakian, H., Ball, J., Barion, L., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W., Burkert, V. D., Cao, F., Carman, D. S., Celentano, A., Charles, G., Chatagnon, Pierre, Chetry, T., Ciullo, G., Clary, Brandon A., Contalbrigo, M., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dupre, R., Egiyan, H., Ehrhart, Mathieu, El Alaoui, A., Fassi, L. El, Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Golovatch, E., Gothe, R. W., Griffioen, K. A., Hafidi, K., Harrison, N., Hauenstein, F., Heddle, D., Hicks, K., Holtrop, M., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jo, H. S., Johnston, S., Kabir, M. L., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuhn, S. E., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Marchand, D., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Mustapha, B., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Pasyuk, E., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Schumacher, R. A., Sharabian, Y. G., Sokhan, D., Sparveris, N., Stepanyan, S., Strauch, S., Taiuti, M., Tan, J. A., Ungaro, M., Voskanyan, H., Voutier, E., Wang, R., Watts, D. P., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., Zheng, X., and Zhao, Z. W.

Abstract

Short-range correlated (SRC) nucleon pairs are a vital part of the nucleus, accounting for almost all nucleons with momentum greater than the Fermi momentum (k[subscript F]). A fundamental characteristic of SRC pairs is having large relative momenta as compared to k[subscript F], and smaller center of mass (c.m.) which indicates a small separation distance between the nucleons in the pair. Determining the c.m. momentum distribution of SRC pairs is essential for understanding their formation process. We report here on the extraction of the c.m. motion of proton-proton (pp) SRC pairs in carbon and, for the first time in heavier and ansymetric nuclei: aluminum, iron, and lead, from measurements of the A(e,e′ pp) reaction. We find that the pair c.m. motion for these nuclei can be described by a three-dimensional Gaussian with a narrow width ranging from 140 to 170 MeV/c, approximately consistent with the sum of two mean-field nucleon momenta. Comparison with calculations appears to show that the SRC pairs are formed from mean-field nucleons in specific quantum states., National Science Foundation (U.S.)

Published
2018

33. Differential cross section measurements for γn → π−p above the first nucleon resonance region

Author

Mattione, P. T., Carman, D. S., Strakovsky, I. I., Workman, R. L., Kudryavtsev, A. E., Svarc, A., Tarasov, V. E., Adhikari, K. P., Adhikari, S., Adikaram, D., Akbar, Z., Anefalos Pereira, S., Ball, J., Baltzell, N. A., Bashkanov, M., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Burkert, V. D., Cao, T., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Defurne, M., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Fradi, A., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Hollis, G., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Meyer, C. A., Meziani, Z. E., Mineeva, T., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Ritchie, B. G., Rizzo, A., Rosner, G., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strauch, S., Taiuti, M., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D., Wei, X., Wood, M. H., Zachariou, N., Zhang, J., and Zhao, Z. W.

Subjects
High Energy Physics::Experiment
Abstract

The quasifree \ud γ\ud d\ud →\ud π\ud −\ud p\ud (\ud p\ud )\ud differential cross section has been measured with CLAS at photon beam energies \ud E\ud γ\ud from 0.445 to 2.510 GeV (corresponding to \ud W\ud from 1.311 to 2.366 GeV) for pion center-of-mass angles \ud cos\ud θ\ud c\ud .\ud m\ud .\ud π\ud from \ud −\ud 0.72\ud to 0.92. A correction for final state interactions has been applied to these data to extract the \ud γ\ud n\ud →\ud π\ud −\ud p\ud differential cross sections. These cross sections are quoted in 8428 \ud (\ud E\ud γ\ud ,\ud cos\ud θ\ud c\ud .\ud m\ud .\ud π\ud )\ud bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of \ud N\ud ∗\ud resonances and extract their properties. Selected photon decay amplitudes \ud N\ud ∗\ud →\ud γ\ud n\ud at the resonance poles are determined for the first time and are reported here.

Published
2017

34. Measurements of ep→e′π+π−p′ cross sections with CLAS at 1.40 GeV < W < 2.0 GeV and 2.0 GeV2 < Q2 < 5.0 GeV2

Author

Isupov, E. L., Burkert, V. D., Carman, D. S., Gothe, R. W., Hicks, K., Ishkhanov, B. S., Mokeev, V. I., Adhikari, K. P., Adhikari, S., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Avakian, H., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Cao, T., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Glazier, D. I., Gleason, C., Golovatch, E., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Jenkins, D., Jiang, H., Joo, K., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Kuleshov, S. V., Kunkel, M., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., McKinnon, B., Mineeva, T., Mirazita, M., Montgomery, R. A., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Procureur, S., Prok, Y., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Ritchie, B. G., Rizzo, A., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Trivedi, A., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Wei, X., Wood, M. H., Zachariou, N., and Zhang, J.

Abstract

This paper reports new exclusive cross sections for ep → ep\ud π+π−p' using the CLAS detector at Jefferson\ud Laboratory. These results are presented for the first time at photon virtualities 2.0 GeV2 < Q2 < 5.0 GeV2 in\ud the center-of-mass energy range 1.4 GeV

Published
2017

35. Target and beam-target spin asymmetries in exclusive pion electroproduction for Q2>1 GeV2. II. ep→eπ0p

Author

Bosted, P. E., Kim, A., Adhikari, K. P., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Avakian, H., Badui, R. A., Ball, J., Balossino, I., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Cao, T., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fegan, S., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Fradi, A., Ghandilyan, Y., Gilfoyle, G. P., Girod, F. X., Glazier, D. I., Gohn, W., Golovatch, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Hakobyan, H., Guo, L., Hafidi, K., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Hollis, G., Holtrop, M., Hughes, S. M., Ireland, D. G., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joo, K., Keller, D., Khachatryan, G., Khandaker, M., Kim, W., Klei, A., Klein, F. J., Koirala, S., Kubarovsky, V., Kuhn, S. E., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McCracken, M. E., McKinnon, B., Mineeva, T., Mirazita, M., Mokeev, V. I., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pisano, S., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Raue, B. A., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Saini, M. S., Schumacher, R. A., Seder, E., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Zachariou, N., Zhang, J., Zhao, Z. W., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Economica, Socio-culturale, High Energy Physics::Experiment, RESONANCE, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

Beam-target double-spin asymmetries and target single-spin asymmetries were measured for the exclusive \ud π\ud 0\ud electroproduction reaction \ud γ\ud ∗\ud p\ud →\ud p\ud π\ud 0\ud , expanding an analysis of the \ud γ\ud ∗\ud p\ud →\ud n\ud π\ud +\ud reaction from the same experiment. The results were obtained from scattering of 6-GeV longitudinally polarized electrons off longitudinally polarized protons using the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The kinematic ranges covered are \ud 1.1\ud

Published
2017

36. Reinvestigation of the excited states in the proton emitter 151Lu : Particle-hole excitations across the N=Z=64 subshell

Author

Wang, F., Sun, B. H., Liu, Z., Qi, C., Zhu, L. H., Scholey, Catherine, Ashley, S. F., Bianco, L., Cullen, I. J., Darby, I. G., Eeckhaudt, Sarah, Garnsworthy, A. B., Gelletly, W., Gomez-Hornillos, M. B., Grahn, Tuomas, Greenlees, Paul, Jenkins, D. G., Jones, G. A., Jones, P., Joss, D. T., Julin, Rauno, Juutinen, Sakari, Ketelhut, Steffen, Khan, S., Kishada, A., Leino, Matti, Niikura, M., Nyman, M., Page, R. D., Pakarinen, J., Pietri, S., Podolyák, Zs., Rahkila, Panu, Rigby, S., Sarén, Jan, Shizuma, T., Sorri, Juha, Steer, S., Thomson, J., Thompson, N. J., Uusitalo, Juha, Walker, P. M., and Williams, S.

Subjects
electromagnetic transitions, ydinfysiikka
Abstract

The excited states of the proton emitter 151Lu were reinvestigated in a recoil-decay tagging experiment at the Accelerator Laboratory of the University of Jyväskylä (JYFL). The level scheme built on the ground state of 151Lu was updated with five new γ -ray transitions. Large-scale shell model calculations were carried out in the model space consisting of the neutron and proton orbitals 0g7/2, 1d5/2, 1d3/2, 2s1/2, and 0h11/2 with the optimized monopole interaction in order to interpret the experimental level scheme of 151Lu. It is found that the excitation energies of states above the 27/2− and 23/2+ isomeric levels in 151Lu can be sensitive to excitations from g7/2 and d5/2 to single-particle orbitals above N = Z = 64. peerReviewed

Published
2017

37. Target and beam-target spin asymmetries in exclusive π+ and π- Electroproduction with 1.6- to 5.7-GeV electrons

Author

Bosted, P, Biselli, A, Careccia, S, Dodge, G, Fersch, R, Guler, N, Kuhn, S, Pierce, J, Prok, Y, Zheng, X, Adhikari, K, Adikaram, D, Akbar, Z, Amaryan, M, Anefalos Pereira, S, Asryan, G, Avakian, H, Badui, R, Ball, J, Baltzell, N, Battaglieri, M, Batourine, V, Bedlinskiy, I, Boiarinov, S, Briscoe, W, Bultmann, S, Burkert, V, Cao, T, Carman, D, Celentano, A, Chandavar, S, Charles, G, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, Deur, A, Djalali, C, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fanchini, E, Fedotov, G, Filippi, A, Fleming, J, Forest, T, Fradi, A, Garcon, M, Gevorgyan, N, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Gleason, C, Gohn, W, Golovatch, E, Gothe, R, Griffioen, K, Guo, L, Hafidi, K, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Holtrop, M, Hughes, S, Ilieva, Y, Ireland, D, Ishkhanov, B, Isupov, E, Jenkins, D, Jiang, H, Hs, J, Joo, K, Joosten, S, Keller, D, Khandaker, M, Kim, W, Klein, A, Klein, Kubarovsky, F, V, Kuleshov, S, Lanza, L, Lenisa, P, Livingston, K, Hy, L, Macgregor, I, Markov, N, Mccracken, M, Mckinnon, B, Meyer, C, Minehart, R, Mirazita, M, Mokeev, V, Movsisyan, A, Munevar, E, Munoz Camacho, C, Nadel Turonski, P, Net, L, Ni, A, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Pasyuk, E, Peng, P, Phelps, W, Pisano, S, Pogorelko, O, Price, J, Procureur, S, Protopopescu, D, Puckett, A, Raue, B, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatie, F, Salgado, C, Schumacher, R, Seder, E, Sharabian, Y, Simonyan, A, Skorodumina, I, Smith, G, Sparveris, N, Stankovic, I, Stepanyan, S, Strakovsky, I, Strauch, S, Sytnik, V, Taiuti, M, Tian, Y, Torayev, B, Ungaro, M, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Weinstein, L, Wood, M, Zachariou, N, Zana, L, Zhang, J, Zhao, Z, and Zonta, I

Subjects
GEV2, DEUTERONS, CLAS, CHARGED PIONS, NUCLEON, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2016

38. Measurement of target and double-spin asymmetries for the e p → eπ+(n) reaction in the nucleon resonance region at low Q2

Author

Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J.-P., Chetry, T., Choi, Seonho, Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D.G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I.J.D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I.

Subjects
Nuclear and High Energy Physics, Economica, Socio-culturale, High Energy Physics::Experiment, Nuclear Experiment, Settore FIS/04 - Fisica Nucleare e Subnucleare
Abstract

We report measurements of target- and double-spin asymmetries for the exclusive channel ep → eπ+(n) in\ud the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These\ud asymmetries were extracted from data obtained using a longitudinally polarized NH3 target and a longitudinally\ud polarized electron beam with energies 1.1, 1.3, 2.0, 2.3, and 3.0 GeV. The new results are consistent with previous\ud CLAS publications but are extended to a low Q2 range from 0.0065 to 0.35 (GeV/c)\ud 2. The Q2 access was made\ud possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low\ud as 6◦. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis\ud prediction from SAID, and the dynamic model DMT. In many kinematic regions our results, in particular results\ud on the target asymmetry, help to constrain the polarization-dependent components of these models.

Published
2016

39. Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

Author

Paterson, C, Ireland, D, Livingston, K, Mckinnon, B, Adhikari, K, Adikaram, D, Akbar, Z, Amaryan, M, Anefalos Pereira, S, Badui, R, Ball, J, Baltzell, N, Battaglieri, M, Bedlinskiy, I, Biselli, A, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Celentano, A, Chetry, T, Ciullo, G, Clark, L, Colaneri, L, Cole, P, Compton, N, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, De Vita, R, Deur, A, Djalali, C, Dugger, M, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Fanchini, E, Fedotov, G, Filippi, A, Fleming, J, Gevorgyan, N, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Glazier, D, Gleason, C, Gothe, R, Griffioen, K, Guo, L, Hafidi, K, Harrison, N, Hattawy, M, Hicks, K, Holtrop, M, Hughes, S, Ilieva, Y, Ishkhanov, B, Isupov, E, Jenkins, D, Jiang, H, Joo, K, Keller, D, Khachatryan, G, Khandaker, M, Kim, W, Klein, F, Kubarovsky, V, Kuleshov, S, Lanza, L, Lenisa, P, Hy, L, Macgregor, I, Markov, N, Mattione, P, Mayer, C, Mccracken, M, Mokeev, V, Movsisyan, A, Munevar, E, Munoz Camacho, C, Nadel Turonski, P, Net, L, Ni, A, Niccolai, S, Niculescu, G, Osipenko, M, Ostrovidov, A, Paremuzyan, R, Park, K, Pasyuk, E, Peng, P, Pisano, S, Pogorelko, O, Price, J, Prok, Y, Protopopescu, D, Puckett, A, Raue, B, Ripani, M, Ritchie, B, Rizzo, A, Rosner, G, Roy, P, Sabatie, F, Salgado, C, Schumacher, R, Seder, E, Sharabian, Y, Skorodumina, I, Smith, G, Sober, D, Sokhan, D, Sparveris, N, Strakovsky, I, Strauch, S, Sytnik, V, Taiuti, M, Torayev, B, Tucker, R, Ungaro, M, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Zachariou, N, Zana, L, Zhang, J, and Zonta, I

Subjects
BREMSSTRAHLUNG, BEAM, OBSERVABLES, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2016

40. Photoproduction of Λ and Σ0 hyperons using linearly polarized photons

Author

Paterson, C.A., Ireland, D.G., Livingston, K., McKinnon, B., Adikaram, D., Akbar, Z., Amaryan, M., Pereira, S. Anefalos, Badui, R.A., Ball, J., Baltzell, N.A., Battaglieri, M., Bedlinskiy, I., Biselli, A., Briscoe, W.J., Brooks, W.K., Burkert, V.D., Carman, D.S., Celentano, A., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P.L., Compton, N., Contalbrigo, M., Cortes, O., Crede, V., D'Angelo, A., De Vita, R., Deur, A., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J.A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G.P., Giovanetti, K.L., Girod, F.X., Glazier, D.I., Gleason, C., Gothe, R.W., Griffioen, K.A., Guo, L., Hafidi, K., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S.M., Ilieva, Y., Ishkhanov, B.S., Isupov, E.L., Jenkins, D., Jiang, H., Joo, K., Keller, D., Khachatryan, G., Khandaker, M., Kim, W., Klein, F.J., Kubarovsky, V., Kuleshov, S.V., Lanza, L., Lenisa, P., Lu, H.Y., MacGregor, I.J.D., Markov, N., Mattione, P., Mayer, C.A., McCracken, M.E., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Nadel-Turonski, P., Net, L.A., Ni, A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A.I., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J.W., Prok, Y., Protopopescu, D., Puckett, A.J.R., Raue, B.A., Ripani, M., Ritchie, B.G., Rizzo, A., Rosner, G., Roy, P., Sabatie, F., Salgado, C., Schumacher, R.A., Seder, E., Sharabian, Y.G., Skorodumina, Iu., Smith, G.D., Sober, D.I., Sokhan, D., Sparveris, N., Strakovsky, I.I., Strauch, S., Sytnik, V., Taiuti, M., Torayev, B., Tucker, R., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N.K., Watts, D.P., Wei, X., Zachariou, N., Zana, L., Zhang, J., and Zonta, I.

Subjects
Nuclear Experiment
Abstract

Background: Measurements of polarization observables for the reactions γ⃗ p→K+Λ and γ⃗ p→K+Σ0 have been performed. This is part of a program of measurements designed to study the spectrum of baryon resonances in particular, and nonperturbative QCD in general.\ud Purpose: The accurate measurement of several polarization observables provides tight constraints for phenomenological fits, which allow the study of strangeness in nucleon and nuclear systems. Beam-recoil observables for the γ⃗ p→K+Σ0 reaction have not been reported before now.\ud Method: The measurements were carried out using linearly polarized photon beams incident on a liquid hydrogen target, and the CLAS detector at the Thomas Jefferson National Accelerator Facility. The energy range of the results is 1.71

Published
2016

41. ⁷Be(n,α)⁴He Reaction and the Cosmological Lithium Problem: Measurement of the cross Section in a Wide Energy Range at n_TOF at CERN

Author

n_TOF Collaboration, Barbagallo, M., Musumarra, A., Cosentino, L., Maugeri, E., Heinitz, S., Mengoni, A., Dressler, R., Schumann, D., Käppeler, Franz, Colonna, N., Finocchiaro, P., Ayranov, M., Damone, L., Kivel, N., Aberle, O., Altstadt, S., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea-Correa, J., Barros, S., Bécares, V., Bečvár, F., Beinrucker, C., Berthoumieux, E., Billowes, J., Bosnar, D., Brugger, M., Caamaño, M., Calviani, M., Calviño, F., Cano-Ott, D., Cardella, R., Casanovas, A., Castelluccio, D. M., Cerutti, F., Chen, Y. H., Chiaveri, E., Cortés, G., Cortés-Giraldo, M. A., Cristallo, S., Diakaki, M., Domingo-Pardo, C., Dupont, E., Duran, I., Fernandez-Dominguez, F., Ferrari, A., Ferreira, P., Furman, W., Ganesan, S., García-Rios, A., Gawlik, A., Glodariu, T., Göbel, K., Gonçalves, I. F., González-Romero, E., Griesmayer, E., Guerrero, C., Gunsing, F., Harada, H., Heftrich, T., Heyse, J., Jenkins, D. G., Jericha, E., Katabuchi, T., Kavrigin, P., Kimura, A., Kokkoris, M., Krtička, M., Leal-Cidoncha, E., Lerendegui, J., Lederer, C., Leeb, H., Lo Meo, S., Lonsdale, S. J., Losito, R., Macina, D., Marganiec, J., Martínez, T., Massimi, C., Mastinu, P., Mastromarco, M., Mazzone, A., Mendoza, E., Milazzo, P. M., Mingrone, F., Mirea, M., Montesano, S., Nolte, R., Oprea, A., Pappalardo, A., Patronis, N., Pavlik, A., Perkowski, J., Piscopo, M., Plompen, A., Porras, I., Praena, J., Quesada, J., Rajeev, K., Rauscher, T., Reifarth, R., Riego-Perez, A., Rout, P., Rubbia, C., Ryan, J., Sabate-Gilarte, M., Saxena, A., Schillebeeckx, P., Schmidt, S., Sedyshev, P., Smith, A. G., Stamatopoulos, A., Tagliente, G., Tain, J. L., Tarifeño-Saldivia, A., Tassan-Got, L., Tsinganis, A., Valenta, S., Vannini, G., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Vollaire, J., Wallner, A., Warren, S., Weigand, M., Weiß, C., Wolf, C., Woods, P. J., Wright, T., and Žugec, P.

Subjects
Physics, ddc:530
Published
2016

42. Spectroscopic Quadrupole Moments in Sr 96,98: Evidence for Shape Coexistence in Neutron-Rich Strontium Isotopes at N=60

Author

Clément, E., Zielińska, M., Görgen, A., Korten, W., Péru, S., Libert, J., Goutte, H., Hilaire, S., Bastin, B., Bauer, C., Blazhev, A., Bree, N., Bruyneel, B., Butler, P. A., Butterworth, J., Delahaye, P., Dijon, A., Doherty, D. T., Ekström, A., Fitzpatrick, C., Fransen, C., Georgiev, G., Gernhäuser, R., Hess, H., Iwanicki, J., Jenkins, D. G., Larsen, A. C., Ljungvall, J., Lutter, R., Marley, P., Moschner, K., Napiorkowski, P. J., Pakarinen, J., Petts, A., Reiter, P., Renstrøm, T., Seidlitz, M., Siebeck, B., Siem, S., Sotty, C., Srebrny, J., Stefanescu, I., Tveten, G. M., Van De Walle, J., Vermeulen, M., Voulot, D., Warr, N., Wenander, F., Wiens, A., De Witte, H., and Wrzosek-Lipska, K.

Subjects
Nuclear Theory, Physics::Accelerator Physics
Abstract

Neutron-rich 96;98Sr isotopes have been investigated by safe Coulomb excitation of radioactive beams at the REX-ISOLDE facility. Reduced transition probabilities and spectroscopic quadrupole moments have been extracted from the differential Coulomb excitation cross sections. These results allow, for the first time, the drawing of definite conclusions about the shape coexistence of highly deformed prolate and spherical configurations. In particular, a very small mixing between the coexisting states is observed, contrary to other mass regions where strong mixing is present. Experimental results have been compared to beyond-mean-field calculations using the Gogny D1S interaction in a five-dimensional collective Hamiltonian formalism, which reproduce the shape change at N ¼ 60.

Published
2016

43. Measurements of ep→e′π+nat1.6<W<2.0 GeV and extraction of nucleon resonance electrocouplings at CLAS

Author

Park, K, Aznauryan, Ig, Burkert, Vd, Adhikari, Kp, Amaryan, Mj, Pereira, Sa, Avakian, H, Battaglieri, M, Badui, R, Bedlinskiy, I, Biselli, As, Bono, J, Briscoe, Wj, Brooks, Wk, Carman, Ds, Celentano, A, Chandavar, S, Charles, G, Colaneri, L, Cole, Pl, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, Alaoui, Ae, Elouadrhiri, L, Fassi, Le, Eugenio, P, Fedotov, G, Fegan, S, Fersch, R, Filippi, A, Fleming, Ja, Garillon, B, Garçon, M, Gevorgyan, N, Gilfoyle, Gp, Giovanetti, Kl, Girod, Fx, Joo, Hs, Goetz, Jt, Golovatch, E, Gothe, Rw, Griffioen, Ka, Guegan, B, Guidal, M, Guo, L, Hakobyan, H, Hanretty, C, Hattawy, M, Hicks, K, Holtrop, M, Hughes, Sm, Hyde, Ce, Ilieva, Y, Ireland, Dg, Ishkhanov, Bs, Isupov, El, Jenkins, D, Jiang, H, H. S., J, Joo, K, Joosten, S, Keller, D, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, Fj, Kubarovsky, V, Kuhn, Se, Kuleshov, Sv, Lenisa, P, Livingston, K, H. Y., L, Macgregor, Ijd, Markov, N, Martinez, D, Mckinnon, B, Mokeev, V, Montgomery, Ra, Moutarde, H, Camacho, Cm, Nadel-Turonski, P, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, Ai, Paolone, M, Pasyuk, E, Peng, P, Phelps, W, Phillips, Jj, Pisano, S, Pogorelko, O, Price, Jw, Procureur, S, Prok, Y, Protopopescu, D, Puckett, Ajr, Raue, Ba, Ripani, M, Rizzo, A, Rosner, G, Rossi, P, Roy, P, Sabatié, F, Salgado, C, Schott, D, Schumacher, Ra, Seder, E, Sharabian, Yg, Simonyan, A, Skorodumina, I, Smith, Es, Smith, Gd, Sparveris, N, Stoler, P, Strakovsky, Ii, Strauch, S, Sytnik, V, Taiuti, M, Tang, W, Taylor, Ce, Tian, Y, Trivedi, A, Ungaro, M, Voskanyan, H, Voutier, E, Walford, Nk, Watts, Dp, Wei, X, Weinstein, Lb, Wood, Mh, Zachariou, N, Zana, L, Zhang, J, Zhao, Zw, and Zonta, I

Subjects
RELATIVISTIC QUARK-MODEL, TRANSITION FORM-FACTORS, MESON PRODUCTION, GAMMA-ASTERISK, ELECTROPRODUCTION, PHOTOPRODUCTION, REGION, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2015

44. Exclusive pi(0) electroproduction at W > 2 GeV with CLAS

Author

Bedlinskiy, I, Kubarovsky, V, Niccolai, S, Stoler, P, Adhikari, K, Anderson, M, Pereira, S, Avakian, H, Ball, J, Baltzell, N, Battaglieri, M, Batourine, V, Biselli, A, Boiarinov, S, Bono, J, Briscoe, W, Brooks, W, Burkert, V, Carman, D, Celentano, A, Chandavar, S, Colaneri, L, Cole, P, Contalbrigo, M, Cortes, O, Crede, V, D'Angelo, A, Dashyan, N, De Vita, R, De Sanctis, E, Deur, A, Djalali, C, Doughty, D, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Elouadrhiri, L, Eugenio, P, Fedotov, G, Fegan, S, Fleming, J, Forest, T, Garillon, B, Garcon, M, Gavalian, G, Gevorgyan, N, Ghandilyan, Y, Gilfoyle, G, Giovanetti, K, Girod, F, Golovatch, E, Gothe, R, Griffioen, K, Guegan, B, Guidal, M, Guo, L, Hafidi, K, Hakobyan, H, Harrison, N, Hattawy, M, Hicks, K, Holtrop, M, Ireland, D, Ishkhanov, B, Isupov, E, Jenkins, D, Jo, H, Joo, K, Keller, D, Khandaker, M, Kim, A, Kim, W, Klein, A, Klein, F, Koirala, S, Kuhn, S, Kuleshov, S, Lenisa, P, Levine, W, Livingston, K, Lu, H, Macgregor, I, Markov, N, Mayer, M, Mckinnon, B, Mirazita, M, Mokeev, V, Montgomery, R, Moody, C, Moutarde, H, Movsisyan, A, Camacho, C, Nadel Turonski, P, Niculescu, I, Osipenko, M, Ostrovidov, A, Pappalardo, L, Park, K, Park, S, Pasyuk, E, Phelps, E, Phelps, W, Phillips, J, Pisano, S, Pogorelko, O, Price, J, Prok, Y, Protopopescu, D, Procureur, S, Puckett, A, Raue, B, Ripani, M, Ritchie, B, Rizzo, A, Rossi, P, Roy, P, Sabatie, F, Salgado, C, Schott, D, Schumacher, R, Seder, E, Senderovich, I, Sharabian, Y, Simonyan, A, Smith, G, Sober, D, Sokhan, D, Stepanyan, S, Strauch, S, Sytnik, V, Tang, W, Tian, Y, Ungaro, M, Vlassov, A, Voskanyan, H, Voutier, E, Walford, N, Watts, D, Wei, X, Weinstein, L, Yurov, M, Zachariou, N, Zana, L, Zhang, J, Zhao, Z, and Zonta, I

Subjects
TRANSVERSITY, PARTON DISTRIBUTIONS, PION ELECTROPRODUCTION, MESONS, SYSTEM, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2014

45. Comparison of forward and backward pp pair knockout in He-3(e,e'pp)n

Author

Baghdasaryan, H., Weinstein, L. B., Laget, J. M., Adhikari, K. P., Aghasyan, M., Amaryan, M. J., Anghinolfi, M., Ball, J., Battaglieri, M., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Sanctis, E., De Vita, R., Djalali, C., Dodge, G. E., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Fedotov, G., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gohn, W., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Hafidi, K., Hicks, K., Hyde, C. E., Ireland, D. G., Ishkhanov, B. S., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Lu, H. Y., MacGregor, I. J. D., McKinnon, B., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Park, K., Park, S., Pisano, S., Pozdniakov, S., Procureur, S., Raue, B. A., Ricco, G., Rimal, D., Ripani, M., Rosner, G., Rossi, P., Saini, M. S., Saylor, N. A., Schott, D., Schumacher, R. A., Seraydaryan, H., Smith, E. S., Sober, D. I., Sokan, D., Stepanyan, S. S., Stepanyan, S., Strauch, S., Taiuti, M., Tang, W., Tkachenko, S., Voskanyan, H., Voutier, E., Wood, M. H., Zana, L., and Zhao, B.

Subjects
MECHANISMS, DEUTERON, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

46. Measurement of the generalized form factors near threshold via gamma* p -> n pi(+) at high Q(2)

Author

Park, K., Gothe, R. W., Adhikari, K. P., Adikaram, D., Anghinolfi, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Bookwalter, C., Boiarinov, S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Cole, P. L., Contalbrigo, Marco, Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., Vita, R. D., Sanctis, E. D., Deur, A., Djalali, C., Doughty, D., Dupre, R., Alaoui, A. E., Fassi, L. E., Eugenio, P., Fedotov, G., Fradi, A., Gabrielyan, M. Y., Gevorgyan, N., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Golovatch, E., Graham, L., Griffioen, K. A., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Heddle, D., Hicks, K., Holtrop, M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., H. S., Jo, Joo, K., Kalantarians, N., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, A., Kubarovsky, V., Kuhn, S. E., Kuleshov, S. V., Kvaltine, N. D., Livingston, K., H. Y., Lu, I. J. D., Markov, N., Mayer, M., Mckinnon, B., Mestayer, M. D., Meyer, C. A., Mineeva, T., Mirazita, M., Mokeev, V., Moutarde, H., Munevar, E., Nadel Turonski, P., Nasseripour, R., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, Luciano Libero, Paremuzyan, R., Park, S., Pereira, S. A., Phelps, E., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Prok, Y., Ricco, G., Rimal, D., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Sokhan, D., Stepanyan, S. S., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Tian, Y., Tkachenko, S., Trivedi, A., Ungaro, M., Vernarsky, B., Vlassov, A. V., Voutier, E., Watts, D. P., Weygand, D. P., Wood, M. H., Zachariou, N., Zhao, B., and Zhao, Z. W.

Subjects
QUANTUM CHROMODYNAMICS, PI-0, PION ELECTROPRODUCTION, NUCLEONS, PROTON, PHOTOPRODUCTION, Settore FIS/04 - Fisica Nucleare e Subnucleare
Published
2012

47. Electromagnetic decay of the Sigma(0)(1385) to Lambda gamma

Author

Keller, D., Hicks, K., Adhikari, K. P., Adikaram, D., Aghasyan, M., Amarian, M., Baghdasaryan, H., Ball, J., Battaglieri, M., Batourine, V., Bedlinskiy, I., Bennett, R. P., Biselli, A. S., Branford, D., Briscoe, W. J., Brooks, W. K., Burkert, V. D., Careccia, S. L., Carman, D. S., Casey, L., Cole, P. L., Contalbrigo, M., Crede, V., D'Angelo, A., Daniel, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Dey, B., Dickson, R., Djalali, C., Doughty, D., Dupre, R., Egiyan, H., El Alaoui, A., El Fassi, L., Eugenio, P., Fedotov, G., Fegan, S., Forest, T. A., Gabrielyan, M. Y., Gavalian, G., Gevorgyan, N., Giovanetti, K. L., Girod, F. X., Gohn, W., Golovatch, E., Gothe, R. W., Graham, L., Guidal, M., Guegan, B., Hafidi, K., Hakobyan, H., Hanretty, C., Holtrop, M., Ilieva, Y., Ireland, D. G., Isupov, E. L., Jawalkar, S. S., Jenkins, D., Jo, H. S., Joo, K., Khandaker, M., Khetarpal, P., Kim, A., Kim, W., Klein, A., Klein, F. J., Konczykowski, P., Kubarovsky, V., Kuleshov, S. V., Kuznetsov, V., Lu, H. Y., MacGregor, I. J. D., Markov, N., McAndrew, J., McKinnon, B., Meyer, C. A., Micherdzinska, A. M., Mirazita, M., Mokeev, V., Moreno, B., Moriya, K., Morrison, B., Moutarde, H., Munevar, E., Nadel-Turonski, P., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Park, S., Pasyuk, E., Pereira, S. Anefalos, Pappalardo, L. L., Pisano, S., Pogorelko, O., Pozdniakov, S., Price, J. W., Procureur, S., Protopopescu, D., Raue, B. A., Ripani, M., Ritchie, B. G., Rosner, G., Rossi, P., Sabatie, F., Saini, M. S., Salgado, C., Schott, D., Schumacher, R. A., Seder, E., Seraydaryan, H., Sharabian, Y. G., Smith, E. S., Smith, G. D., Sober, D. I., Stepanyan, S. S., Stoler, P., Strakovsky, I. I., Strauch, S., Taiuti, M., Tang, W., Taylor, C. E., Vernarsky, B., Vineyard, M. F., Voutier, E., Weinstein, L. B., Watts, D. P., Wood, M. H., Zachariou, N., Zana, L., Zhao, B., and Zhao, Z. W.

Subjects
BARYONS, STRANGENESS, Electric and Magnetyic Moments, Leptonic, and radiative decays, Electromagnetic decays, Settore FIS/04 - Fisica Nucleare e Subnucleare, DECUPLET, semileptonic, Hyperons, HYPERONS, QUARK-MODEL, RADIATIVE DECAYS
Published
2011

48. High-spin states in 179Au: Spectroscopy of shape-driving orbitals beyond the neutron midshell

Author

Khoo, T.L., Sonzogni, A.A., Bingham, C.R., Wadsworth, R., Varmette, P.G., Seweryniak, D., Herskind, B., Carpenter, M.P., Kondev, F.G., Ma, W.C., Sarantites, D.G., Ressler, J., Amro, H., Caggiano, J., Heinz, A., Reviol, W., Lauritsen, T., Ahmad, I., Jenkins, D., Uusitalo, J., Davids, C.N., Hartley, D., Janssens, R.V.F., Mueller, W.F., Riedinger, L.L., Siem, S., Saleem, K.A., and Wiedenhöver, I.

Abstract

Multiple band structures in 179Au are established from γ-ray spectroscopic measurements with Gammasphere at the Argonne Fragment Mass Analyzer. The yrast band, based on the 13/2+ proton, confirms the predicted drop in excitation energy of the prolate deformed band head as compared to the heavier isotopes. The implications for the prolate energy minimum in odd-mass Au nuclei beyond the neutron i13/2 midshell (N

Published
2004
Full Text
View/download PDF

49. Confirmation of triple shape coexistence in 179Hg: Focal plane spectroscopy of the α decay of 183Pb

Author

Jenkins, D. G., Andreyev, A. N., Page, R. D., Carpenter, M. P., Janssens, R. V. F., Lister, C. J., Kondev, F. G., Enqvist, T., Greenlees, P. T., Jones, P. M., Julin, R., Juutinen, S., Kettunen, H., Kuusiniemi, P., Leino, M., Leppännen, A. -P, Nieminen, P., Janne Pakarinen, Rahkila, P., Uusitalo, J., O Leary, C. D., Raddon, P., Simons, A., Wadsworth, R., and Joss, D. T.

Abstract

The α decay of 183Pb has been studied in detail at the focal plane of the RITU gas-filled separator. The four previously known α decay branches have been ordered into the decay of two isomers in 183Pb. The deduced decay scheme and the interpretation of the inferred α decay hindrance factors and γ rays observed at the focal plane are strongly in favor of the recent suggestion of triple shape coexistence-oblate, prolate, and near-spherical in the daughter nucleus 179Hg.

Published
2002
Full Text
View/download PDF

50. Prolate yrast cascade in 183Tl

Author

Reviol, W., Carpenter, M. P., Janssens, R. V. F., Jenkins, D., Toth, K. S., Bingham, C. R., Riedinger, L. L., Weintraub, W., Cizewski, J. A., Lauritsen, T., Seweryniak, D., Uusitalo, J., Wiedenhöver, I., Wadsworth, R., Anna Wilson, Gross, C. J., Batchelder, J. C., Helariutta, K., and Juutinen, S.

Abstract

The yrast sequence in 183Tl has been studied for the first time in recoil-mass selected γ-ray spectroscopic measurements. A rotational-like cascade of seven transitions is established down to the band head with probable spin and parity (13/2+). Unlike in the adjacent odd-mass Tl nuclei, prompt γ decay from the yrast band to a lower lying weakly deformed (oblate) structure is not observed. These features are consistent with the predicted drop of the prolate band head in 183Tl compared to 185Tl. The implications for the prolate energy minimum in odd-mass Tl nuclei at the neutron i 13/2 midshell (N = 103) are discussed.

Published
2000
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results