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13 results on '"Rojo, J. S."'

1. High-precision spectroscopy of $^{20}$O benchmarking ab-initio calculations in light nuclei

Author

Zanon, I., Clément, E., Goasduff, A., Menéndez, J., Miyagi, T., Assié, M., Ciemała, M., Flavigny, F., Lemasson, A., Matta, A., Ramos, D., Rejmund, M., Achouri, L., Ackermann, D., Barrientos, D., Beaumel, D., Benzoni, G., Boston, A. J., Boston, H. C., Bottoni, S., Bracco, A., Brugnara, D., de France, G., de Sereville, N., Delaunay, F., Desesquelles, P., Didierjean, F., Domingo-Prato, C., Dudouet, J., Eberth, J., Fernández, D., Fougères, C., Gadea, A., Galtarossa, F., Girard-Alcindor, V., Gonzales, V., Gottardo, A., Hammache, F., Harkness-Brennan, L. J., Hess, H., Judson, D. S, Jungclaus, A., Kaşkaş, A., Kim, Y. H., Kuşoğlu, A., Labiche, M., Leblond, S., Lenain, C., Lenzi, S. M., Leoni, S., Li, H., Ljungvall, J., Lois-Fuentes, J., Lopez-Martens, A., Maj, A., Menegazzo, R., Mengoni, D., Michelagnoli, C., Million, B., Napoli, D. R., Nyberg, J., Pasqualato, G., Podolyak, Zs., Pullia, A., Quintana, B., Recchia, F., Regueira-Castro, D., Reiter, P., Rezynkina, K., Rojo, J. S., Salsac, M. D., Sanchis, E., Şenyiğit, M., Siciliano, M., Sohler, D., Stezowski, O., Theisen, Ch., Utepov, A., Valiente-Dobón, J. J., Verney, D., and Zielinska, M.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The excited states of unstable $^{20}$O were investigated via $\gamma$-ray spectroscopy following the $^{19}$O$(d,p)^{20}$O reaction at 8 $A$MeV. By exploiting the Doppler Shift Attenuation Method, the lifetime of the 2$^+_2$ and 3$^+_1$ states were firmly established. From the $\gamma$-ray branching and E2/M1 mixing ratios for transitions deexciting the 2$^+_2$ and 3$^+_1$ states, the B(E2) and B(M1) were determined. Various chiral effective field theory Hamiltonians, describing the nuclear properties beyond ground states, along with a standard USDB interaction, were compared with the experimentally obtained data. Such a comparison for a large set of $\gamma$-ray transition probabilities with the valence space in medium similarity renormalization group ab-initio calculations was performed for the first time in a nucleus far from stability. It was shown that the ab-initio approaches using chiral EFT forces are challenged by detailed high-precision spectroscopic properties of nuclei. The reduced transition probabilities were found to be a very constraining test of the performance of the ab-initio models., Comment: Supplemental Material available

Published
2024
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2. Horizons: Nuclear Astrophysics in the 2020s and Beyond

Author

Schatz, H., Reyes, A. D. Becerril, Best, A., Brown, E. F., Chatziioannou, K., Chipps, K. A., Deibel, C. M., Ezzeddine, R., Galloway, D. K., Hansen, C. J., Herwig, F., Ji, A. P., Lugaro, M., Meisel, Z., Norman, D., Read, J. S., Roberts, L. F., Spyrou, A., Tews, I., Timmes, F. X., Travaglio, C., Vassh, N., Abia, C., Adsley, P., Agarwal, S., Aliotta, M., Aoki, W., Arcones, A., Aryan, A., Bandyopadhyay, A., Banu, A., Bardayan, D. W., Barnes, J., Bauswein, A., Beers, T. C., Bishop, J., Boztepe, T., Côté, B., Caplan, M. E., Champagne, A. E., Clark, J. A., Couder, M., Couture, A., de Mink, S. E., Debnath, S., deBoer, R. J., Hartogh, J. den, Denissenkov, P., Dexheimer, V., Dillmann, I., Escher, J. E., Famiano, M. A., Farmer, R., Fisher, R., Fröhlich, C., Frebel, A., Fryer, C., Fuller, G., Ganguly, A. K., Ghosh, S., Gibson, B. K., Gorda, T., Gourgouliatos, K. N., Graber, V., Gupta, M., Haxton, W., Heger, A., Hix, W. R., Ho, W C. G., Holmbeck, E. M., Hood, A. A., Huth, S., Imbriani, G., Izzard, R. G., Jain, R., Jayatissa, H., Johnston, Z., Kajino, T., Kankainen, A., Kiss, G. G., Kwiatkowski, A., La Cognata, M., Laird, A. M., Lamia, L., Landry, P., Laplace, E., Launey, K. D., Leahy, D., Leckenby, G., Lennarz, A., Longfellow, B., Lovell, A. E., Lynch, W. G., Lyons, S. M., Maeda, K., Masha, E., Matei, C., Merc, J., Messer, B., Montes, F., Mukherjee, A., Mumpower, M., Neto, D., Nevins, B., Newton, W. G., Nguyen, L. Q., Nishikawa, K., Nishimura, N., Nunes, F. M., O'Connor, E., O'Shea, B. W., Ong, W-J., Pain, S. D., Pajkos, M. A., Pignatari, M., Pizzone, R. G., Placco, V. M., Plewa, T., Pritychenko, B., Psaltis, A., Puentes, D., Qian, Y-Z., Radice, D., Rapagnani, D., Rebeiro, B. M., Reifarth, R., Richard, A. L., Rijal, N., Roederer, I. U., Rojo, J. S., K, J. S, Saito, Y., Schwenk, A., Sergi, M. L., Sidhu, R. S., Simon, A., Sivarani, T., Skúladóttir, Á., Smith, M. S., Spiridon, A., Sprouse, T. M., Starrfield, S., Steiner, A. W., Strieder, F., Sultana, I., Surman, R., Szücs, T., Tawfik, A., Thielemann, F., Trache, L., Trappitsch, R., Tsang, M. B., Tumino, A., Upadhyayula, S., Martínez, J. O. Valle, Van der Swaelmen, M., Vázquez, C. Viscasillas, Watts, A., Wehmeyer, B., Wiescher, M., Wrede, C., Yoon, J., Zegers, R G. T., Zermane, M. A., and Zingale, M.

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

Nuclear Astrophysics is a field at the intersection of nuclear physics and astrophysics, which seeks to understand the nuclear engines of astronomical objects and the origin of the chemical elements. This white paper summarizes progress and status of the field, the new open questions that have emerged, and the tremendous scientific opportunities that have opened up with major advances in capabilities across an ever growing number of disciplines and subfields that need to be integrated. We take a holistic view of the field discussing the unique challenges and opportunities in nuclear astrophysics in regards to science, diversity, education, and the interdisciplinarity and breadth of the field. Clearly nuclear astrophysics is a dynamic field with a bright future that is entering a new era of discovery opportunities., Comment: 96 pages. Submitted to Journal of Physics G

Published
2022
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3. Narrow resonances in the continuum of the unbound nucleus $^{15}$F

Author

Girard-Alcindor, V., Mercenne, A., Stefan, I., Santos, F. de Oliveira, Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, D., Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, B., Beaumel, D., Benzoni, G., Borcea, R., Boston, A. J., Cáceres, L., Cederwall, B., Celikovic, I., Chudoba, V., Ciemala, M., Collado, J., Crespi, F. C. L., D'Agata, G., De France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L. J., Hess, H., Oliver, D. S. Judson, Kamalou, O., Kameneyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J. S., Rotaru, F., Salsac, M. D., Benítez, A. M. Sánchez, Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, M., Stodel, C., Suzuki, D., Theisen, C., Thomas, J. C., Ujic, P., Valiente-Dobón, J. J., and Zielińska, M.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The structure of the unbound $^{15}$F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive $^{14}$O beam impinging on a CH$_2$ target. The analysis of $^{1}$H($^{14}$O,p)$^{14}$O and $^{1}$H($^{14}$O,2p)$^{13}$N reactions allowed the confirmation of the previously observed narrow $1/2^{-}$ resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2$^{-}$ and 3/2$^{-}$ resonances. The newly observed levels decay by 1p emission to the ground of $^{14}$O, and by sequential 2p emission to the ground state (g.s.) of $^{13}$N via the $1^-$ resonance of $^{14}$O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2$^{-}$ and 3/2$^{-}$ resonances may be collectivized by the continuum coupling to nearby 2p- and 1p- decay channels. The observed excitation function $^{1}$H($^{14}$O,p)$^{14}$O and resonance spectrum in $^{15}$F are well reproduced in the unified framework of the GSM., Comment: 7 pages, 4 figures

Published
2021

4. The MUGAST-AGATA-VAMOS campaign : set-up and performance

Author

Assié, M., Clément, E., Lemasson, A., Ramos, D., Raggio, A., Zanon, I., Galtarossa, F., Lenain, C., Casal, J., Flavigny, F., Matta, A., Mengoni, D., Beaumel, D., Blumenfeld, Y., Borcea, R., Brugnara, D., Catford, W., de Oliveira, F., De Séréville, N., Didierjean, F., Diget, C. Aa., Dudouet, J., Fernandez-Dominguez, B., Fougères, C., Frémont, G., Girard-Alcindor, V., Giret, A., Goasduff, A., Gottardo, A., Goupil, J., Hammache, F., John, P. R., Korichi, A., Lalanne, L., Leblond, S., Lefevre, A., Legruel, F., Menager, L., Million, B., Nicolle, C., Noury, F., Rauly, E., Rezynkina, K., Rindel, E., Rojo, J. S., Siciliano, M., Stanoiu, M., Stefan, I., and Vatrinet, L.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

The MUGAST-AGATA-VAMOS set-up at GANIL combines the MUGAST highly-segmented silicon array with the state-of-the-art AGATA array and the large acceptance VAMOS spectrometer. The mechanical and electronics integration copes with the constraints of maximum efficiency for each device, in particular {\gamma}-ray transparency for the silicon array. This complete set-up offers a unique opportunity to perform exclusive measurements of direct reactions with the radioactive beams from the SPIRAL1 facility. The performance of the set-up is described through its commissioning and two examples of transfer reactions measured during the campaign. High accuracy spectroscopy of the nuclei of interest, including cross-sections and angular distributions, is achieved through the triple-coincidence measurement. In addition, the correction from Doppler effect of the {\gamma}-ray energies is improved by the detection of the light particles and the use of two-body kinematics and a full rejection of the background contributions is obtained through the identification of heavy residues. Moreover, the system can handle high intensity beams (up to 108 pps). The particle identification based on the measurement of the time-of-flight between MUGAST and VAMOS and the reconstruction of the trajectories is investigated., Comment: 13 pages, 18 figures

Published
2021
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5. High-Precision Spectroscopy of O20 Benchmarking Ab Initio Calculations in Light Nuclei

Author

Zanon, I., primary, Clément, E., additional, Goasduff, A., additional, Menéndez, J., additional, Miyagi, T., additional, Assié, M., additional, Ciemała, M., additional, Flavigny, F., additional, Lemasson, A., additional, Matta, A., additional, Ramos, D., additional, Rejmund, M., additional, Achouri, L., additional, Ackermann, D., additional, Barrientos, D., additional, Beaumel, D., additional, Benzoni, G., additional, Boston, A. J., additional, Boston, H. C., additional, Bottoni, S., additional, Bracco, A., additional, Brugnara, D., additional, de France, G., additional, de Sereville, N., additional, Delaunay, F., additional, Desesquelles, P., additional, Didierjean, F., additional, Domingo-Prato, C., additional, Dudouet, J., additional, Eberth, J., additional, Fernández, D., additional, Fougères, C., additional, Gadea, A., additional, Galtarossa, F., additional, Girard-Alcindor, V., additional, Gonzales, V., additional, Gottardo, A., additional, Hammache, F., additional, Harkness-Brennan, L. J., additional, Hess, H., additional, Judson, D. S., additional, Jungclaus, A., additional, Kaşkaş, A., additional, Kim, Y. H., additional, Kuşoğlu, A., additional, Labiche, M., additional, Leblond, S., additional, Lenain, C., additional, Lenzi, S. M., additional, Leoni, S., additional, Li, H., additional, Ljungvall, J., additional, Lois-Fuentes, J., additional, Lopez-Martens, A., additional, Maj, A., additional, Menegazzo, R., additional, Mengoni, D., additional, Michelagnoli, C., additional, Million, B., additional, Napoli, D. R., additional, Nyberg, J., additional, Pasqualato, G., additional, Podolyak, Zs., additional, Pullia, A., additional, Quintana, B., additional, Recchia, F., additional, Regueira-Castro, D., additional, Reiter, P., additional, Rezynkina, K., additional, Rojo, J. S., additional, Salsac, M. D., additional, Sanchis, E., additional, Şenyiğit, M., additional, Siciliano, M., additional, Sohler, D., additional, Stezowski, O., additional, Theisen, Ch., additional, Utepov, A., additional, Valiente-Dobón, J. J., additional, Verney, D., additional, and Zielinska, M., additional

Published
2023
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6. The 46Ar(3He, d)47K direct reaction as a probe of the 46Ar proton wavefunction

Author

Brugnara, D, primary, Gottardo, A, additional, Assié, M, additional, Mengoni, D, additional, Lemasson, A, additional, Clement, E, additional, Flavigny, F, additional, Ramos, D, additional, Galtarossa, F, additional, Matta, A, additional, Girard-Alcindor, V, additional, Babo, M, additional, Bazzacco, D, additional, Beaumel, D, additional, Blumenfeld, Y, additional, Bottoni, S, additional, Datta, U, additional, de Angelis, G, additional, de France, G, additional, Dudouet, J, additional, Duenas, J, additional, Goasduff, A, additional, Gregor, E T, additional, Hammache, F, additional, Illana, A, additional, Lalanne, L, additional, Leblond, S, additional, Lombardo, I, additional, Marchini, N, additional, Million, B, additional, Recchia, F, additional, Rezynkina, K, additional, Rocchini, M, additional, Rojo, J S, additional, Siciliano, M, additional, Valiente-Dobón, J J, additional, Zanon, I, additional, and Zielinska, M, additional

Published
2023
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7. New narrow resonances observed in the unbound nucleus F 15

Author

Girard-Alcindor, V., Mercenne, A., Stefan, I., de Oliveira Santos, F., Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, D., Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, B., Beaumel, D., Benzoni, G., Borcea, R., Boston, A. J., Brugnara, D., Cáceres, L., Cederwall, B., Čeliković, Igor T., Chudoba, V., Ciemala, M., Collado, J., Crespi, F. C. L., D'Agata, G., De France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L. J., Hess, H., Jovančević, N., Judson Oliver, D. S., Kamalou, O., Kamenyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J. S., Rotaru, F., Salsac, M. D., Sánchez Benítez, A. M., Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, M., Stodel, C., Suzuki, D., Theisen, C., Thisse, D., C.Thomas, J., Ujic, P., Valiente-Dobón, J. J., Zielińska, M., Girard-Alcindor, V., Mercenne, A., Stefan, I., de Oliveira Santos, F., Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, D., Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, B., Beaumel, D., Benzoni, G., Borcea, R., Boston, A. J., Brugnara, D., Cáceres, L., Cederwall, B., Čeliković, Igor T., Chudoba, V., Ciemala, M., Collado, J., Crespi, F. C. L., D'Agata, G., De France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L. J., Hess, H., Jovančević, N., Judson Oliver, D. S., Kamalou, O., Kamenyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J. S., Rotaru, F., Salsac, M. D., Sánchez Benítez, A. M., Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, M., Stodel, C., Suzuki, D., Theisen, C., Thisse, D., C.Thomas, J., Ujic, P., Valiente-Dobón, J. J., and Zielińska, M.

Abstract

The structure of the unbound 15F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive 14O beam impinging on a CH2 target. The analysis of 1H(14O,p)14O and 1H(14O,2p)13N reactions allowed the confirmation of the previously observed narrow 1/2− resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2− and 3/2− resonances. The newly observed levels decay by 1p emission to the ground of 14O, and by sequential 2p emission to the ground state of 13N via the 1− resonance of 14O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2− and 3/2− resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function 1H(14O,p)14O and resonance spectrum in 15F are well reproduced in the unified framework of the GSM.

Published
2022

8. New narrow resonances observed in the unbound nucleus 15 F

Author

Girard-Alcindor, V., Mercenne, A., Stefan, I., de Oliveira Santos, F., Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, Diego, Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, Beyhan, Beaumel, D., Benzoni, G., Borcea, R., Boston, A. J., Brugnara, D., Cáceres, L., Cederwall, B., Čeliković, Igor T., Chudoba, V., Ciemala, M., Collado, J., Crespi, F. C. L., D'Agata, G., De France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L. J., Hess, H., Jovančević, N., Judson Oliver, D. S., Kamalou, O., Kamenyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J. S., Rotaru, Florin, Salsac, M. D., Sánchez Benítez, A. M., Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, Mihai, Stodel, C., Suzuki, D., Theisen, C., Thisse, D., C.Thomas, J., Ujic, P., Valiente-Dobón, J. J., Zielińska, M., Girard-Alcindor, V., Mercenne, A., Stefan, I., de Oliveira Santos, F., Michel, N., Płoszajczak, M., Assié, M., Lemasson, A., Clément, E., Flavigny, F., Matta, A., Ramos, Diego, Rejmund, M., Dudouet, J., Ackermann, D., Adsley, P., Assunção, M., Bastin, Beyhan, Beaumel, D., Benzoni, G., Borcea, R., Boston, A. J., Brugnara, D., Cáceres, L., Cederwall, B., Čeliković, Igor T., Chudoba, V., Ciemala, M., Collado, J., Crespi, F. C. L., D'Agata, G., De France, G., Delaunay, F., Diget, C., Domingo-Pardo, C., Eberth, J., Fougères, C., Franchoo, S., Galtarossa, F., Georgiadou, A., Gibelin, J., Giraud, S., González, V., Goyal, N., Gottardo, A., Goupil, J., Grévy, S., Guimaraes, V., Hammache, F., Harkness-Brennan, L. J., Hess, H., Jovančević, N., Judson Oliver, D. S., Kamalou, O., Kamenyero, A., Kiener, J., Korten, W., Koyama, S., Labiche, M., Lalanne, L., Lapoux, V., Leblond, S., Lefevre, A., Lenain, C., Leoni, S., Li, H., Lopez-Martens, A., Maj, A., Matea, I., Menegazzo, R., Mengoni, D., Meyer, A., Million, B., Monteagudo, B., Morfouace, P., Mrazek, J., Niikura, M., Piot, J., Podolyak, Zs., Portail, C., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rezynkina, K., Roger, T., Rojo, J. S., Rotaru, Florin, Salsac, M. D., Sánchez Benítez, A. M., Sanchis, E., Şenyigit, M., de Séréville, N., Siciliano, M., Simpson, J., Sohler, D., Sorlin, O., Stanoiu, Mihai, Stodel, C., Suzuki, D., Theisen, C., Thisse, D., C.Thomas, J., Ujic, P., Valiente-Dobón, J. J., and Zielińska, M.

Abstract

The structure of the unbound 15F nucleus is investigated using the inverse kinematics resonant scattering of a radioactive 14O beam impinging on a CH2 target. The analysis of 1H(14O,p)14O and 1H(14O,2p)13N reactions allowed the confirmation of the previously observed narrow 1/2− resonance, near the two-proton decay threshold, and the identification of two new narrow 5/2− and 3/2− resonances. The newly observed levels decay by 1p emission to the ground of 14O, and by sequential 2p emission to the ground state of 13N via the 1− resonance of 14O. Gamow shell model (GSM) analysis of the experimental data suggests that the wave functions of the 5/2− and 3/2− resonances may be collectivized by the continuum coupling to nearby 2p- and 1p-decay channels. The observed excitation function 1H(14O,p)14O and resonance spectrum in 15F are well reproduced in the unified framework of the GSM.

Published
2022

9. New narrow resonances observed in the unbound nucleus F15

Author

Girard-Alcindor, V., primary, Mercenne, A., additional, Stefan, I., additional, de Oliveira Santos, F., additional, Michel, N., additional, Płoszajczak, M., additional, Assié, M., additional, Lemasson, A., additional, Clément, E., additional, Flavigny, F., additional, Matta, A., additional, Ramos, D., additional, Rejmund, M., additional, Dudouet, J., additional, Ackermann, D., additional, Adsley, P., additional, Assunção, M., additional, Bastin, B., additional, Beaumel, D., additional, Benzoni, G., additional, Borcea, R., additional, Boston, A. J., additional, Brugnara, D., additional, Cáceres, L., additional, Cederwall, B., additional, Celikovic, I., additional, Chudoba, V., additional, Ciemala, M., additional, Collado, J., additional, Crespi, F. C. L., additional, D'Agata, G., additional, De France, G., additional, Delaunay, F., additional, Diget, C., additional, Domingo-Pardo, C., additional, Eberth, J., additional, Fougères, C., additional, Franchoo, S., additional, Galtarossa, F., additional, Georgiadou, A., additional, Gibelin, J., additional, Giraud, S., additional, González, V., additional, Goyal, N., additional, Gottardo, A., additional, Goupil, J., additional, Grévy, S., additional, Guimaraes, V., additional, Hammache, F., additional, Harkness-Brennan, L. J., additional, Hess, H., additional, Jovančević, N., additional, Judson Oliver, D. S., additional, Kamalou, O., additional, Kamenyero, A., additional, Kiener, J., additional, Korten, W., additional, Koyama, S., additional, Labiche, M., additional, Lalanne, L., additional, Lapoux, V., additional, Leblond, S., additional, Lefevre, A., additional, Lenain, C., additional, Leoni, S., additional, Li, H., additional, Lopez-Martens, A., additional, Maj, A., additional, Matea, I., additional, Menegazzo, R., additional, Mengoni, D., additional, Meyer, A., additional, Million, B., additional, Monteagudo, B., additional, Morfouace, P., additional, Mrazek, J., additional, Niikura, M., additional, Piot, J., additional, Podolyak, Zs., additional, Portail, C., additional, Pullia, A., additional, Quintana, B., additional, Recchia, F., additional, Reiter, P., additional, Rezynkina, K., additional, Roger, T., additional, Rojo, J. S., additional, Rotaru, F., additional, Salsac, M. D., additional, Sánchez Benítez, A. M., additional, Sanchis, E., additional, Şenyigit, M., additional, de Séréville, N., additional, Siciliano, M., additional, Simpson, J., additional, Sohler, D., additional, Sorlin, O., additional, Stanoiu, M., additional, Stodel, C., additional, Suzuki, D., additional, Theisen, C., additional, Thisse, D., additional, C.Thomas, J., additional, Ujic, P., additional, Valiente-Dobón, J. J., additional, and Zielińska, M., additional

Published
2022
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11. An implantation Diamond detector as a beam monitor for an intense radioactive ion beam

Author

Rojo, J. S., Diget, C. Aa., de Séréville, N., Assié, M., Lemasson, A., Ramos, D., Lohstroh, A., Reardon, C., Rojo, J. S., Diget, C. Aa., de Séréville, N., Assié, M., Lemasson, A., Ramos, D., Lohstroh, A., and Reardon, C.

Abstract

We present the characterization of a Diamond detector and its response as a beam rate monitor with full stopping of radioactive ion beams of high intensity. The detector has been implemented in the VAMOS focal plane at GANIL and utilised in conjunction with AGATA and MUGAST detector systems. In the present experiment, for the first time, the beam has been fully stopped, rather than being recorded by a transmission detector. The Diamond detector has been tested for use as a particle counter for monitoring a high intensity, radioactive ion beam in the study of the alpha transfer reaction 7Li(15O,t)19Ne. The present experiment, which took place in July 2019, has used a 15O radioactive beam with a high intensity of 107 particles per second due to the weak reaction population and it has been measured using the VAMOS spectrometer and the AGATA and MUGAST arrays. Detailed monitoring of beam intensities in the range of 106 – 107 particles per second is particularly challenging in radioactive ion beam experiments. Thus, the chosen method involves the diamond detector due to its sub-nanosecond response time as well as its radiation hardness. The study of the alpha transfer reaction 7Li(15O,t)19Ne will be performed to determine the radiative alpha capture rate on 15O which is a key breakout route from the Hot-CNO cycle which leads to a explosive nucleosynthesis in X-ray bursts.

12. An implantation Diamond detector as a beam monitor for an intense radioactive ion beam

Author

Rojo, J. S., Diget, C. Aa., de Séréville, N., Assié, M., Lemasson, A., Ramos, D., Lohstroh, A., Reardon, C., Rojo, J. S., Diget, C. Aa., de Séréville, N., Assié, M., Lemasson, A., Ramos, D., Lohstroh, A., and Reardon, C.

Abstract

We present the characterization of a Diamond detector and its response as a beam rate monitor with full stopping of radioactive ion beams of high intensity. The detector has been implemented in the VAMOS focal plane at GANIL and utilised in conjunction with AGATA and MUGAST detector systems. In the present experiment, for the first time, the beam has been fully stopped, rather than being recorded by a transmission detector. The Diamond detector has been tested for use as a particle counter for monitoring a high intensity, radioactive ion beam in the study of the alpha transfer reaction 7Li(15O,t)19Ne. The present experiment, which took place in July 2019, has used a 15O radioactive beam with a high intensity of 107 particles per second due to the weak reaction population and it has been measured using the VAMOS spectrometer and the AGATA and MUGAST arrays. Detailed monitoring of beam intensities in the range of 106 – 107 particles per second is particularly challenging in radioactive ion beam experiments. Thus, the chosen method involves the diamond detector due to its sub-nanosecond response time as well as its radiation hardness. The study of the alpha transfer reaction 7Li(15O,t)19Ne will be performed to determine the radiative alpha capture rate on 15O which is a key breakout route from the Hot-CNO cycle which leads to a explosive nucleosynthesis in X-ray bursts.

13. High-Precision Spectroscopy of ^{20}O Benchmarking Ab Initio Calculations in Light Nuclei.

Author

Zanon I, Clément E, Goasduff A, Menéndez J, Miyagi T, Assié M, Ciemała M, Flavigny F, Lemasson A, Matta A, Ramos D, Rejmund M, Achouri L, Ackermann D, Barrientos D, Beaumel D, Benzoni G, Boston AJ, Boston HC, Bottoni S, Bracco A, Brugnara D, de France G, de Sereville N, Delaunay F, Desesquelles P, Didierjean F, Domingo-Prato C, Dudouet J, Eberth J, Fernández D, Fougères C, Gadea A, Galtarossa F, Girard-Alcindor V, Gonzales V, Gottardo A, Hammache F, Harkness-Brennan LJ, Hess H, Judson DS, Jungclaus A, Kaşkaş A, Kim YH, Kuşoğlu A, Labiche M, Leblond S, Lenain C, Lenzi SM, Leoni S, Li H, Ljungvall J, Lois-Fuentes J, Lopez-Martens A, Maj A, Menegazzo R, Mengoni D, Michelagnoli C, Million B, Napoli DR, Nyberg J, Pasqualato G, Podolyak Z, Pullia A, Quintana B, Recchia F, Regueira-Castro D, Reiter P, Rezynkina K, Rojo JS, Salsac MD, Sanchis E, Şenyiğit M, Siciliano M, Sohler D, Stezowski O, Theisen C, Utepov A, Valiente-Dobón JJ, Verney D, and Zielinska M

Abstract

The excited states of unstable ^{20}O were investigated via γ-ray spectroscopy following the ^{19}O(d,p)^{20}O reaction at 8  AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2_{2}^{+} and 3_{1}^{+} states were firmly established. From the γ-ray branching and E2/M1 mixing ratios for transitions deexciting the 2_{2}^{+} and 3_{1}^{+} states, the B(E2) and B(M1) were determined. Various chiral effective field theory Hamiltonians, describing the nuclear properties beyond ground states, along with a standard USDB interaction, were compared with the experimentally obtained data. Such a comparison for a large set of γ-ray transition probabilities with the valence space in medium similarity renormalization group ab initio calculations was performed for the first time in a nucleus far from stability. It was shown that the ab initio approaches using chiral effective field theory forces are challenged by detailed high-precision spectroscopic properties of nuclei. The reduced transition probabilities were found to be a very constraining test of the performance of the ab initio models.

Published
2023
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