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1,852 results on '"Köster , U."'

103. High-resolution and low-background 163Ho spectrum: interpretation of the resonance tails

Author

Velte, C., Ahrens, F., Barth, A., Blaum, K., Braß, M., Door, M., Dorrer, H., Düllmann, Ch. E., Eliseev, S., Enss, C., Filianin, P., Fleischmann, A., Gastaldo, L., Goeggelmann, A., Goodacre, T. Day, Haverkort, M. W., Hengstler, D., Jochum, J., Johnston, K., Keller, M., Kempf, S., Kieck, T., König, C. M., Köster, U., Kromer, K., Mantegazzini, F., Marsh, B., Novikov, Yu. N., Piquemal, F., Riccio, C., Richter, D., Rischka, A., Rothe, S., Schüssler, R. X., Schweiger, Ch., Stora, T., Wegner, M., Wendt, K., Zampaolo, M., and Zuber, K.

Published
2019
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105. Advances and new ideas for neutron-capture astrophysics experiments at CERN n_TOF

Author

Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. C., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di, C. M., Di, M. S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., García-Infantes, F., Gawlik-Ramięga, A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., (0000-0001-7703-2471) Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Köster, U., Kokkoris, M., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., Pérez, D. R. A., Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., (0000-0002-1400-4120) Turko, J. A. B., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., (0000-0003-2804-3670) Wallner, A., Woods, P. J., Wright, T., Zarrella, R., Žugec, P., Domingo-Pardo, C., Babiano-Suarez, V., Balibrea-Correa, J., Caballero, L., Ladarescu, I., Lerendegui-Marco, J., Tain, J. L., Tarifeño-Saldivia, A., Aberle, O., Alcayne, V., Altieri, S., Amaducci, S., Andrzejewski, J., Bacak, M., Beltrami, C., Bennett, S., Bernardes, A. P., Berthoumieux, E., Boromiza, M., Bosnar, D., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Casanovas, A., Cerutti, F., Cescutti, G., Chasapoglou, S., Chiaveri, E., Chiera, N. M., Colombetti, P., Colonna, N., Camprini, P. C., Cortés, G., Cortés-Giraldo, M. A., Cosentino, L., Cristallo, S., Dellmann, S., Di, C. M., Di, M. S., Diakaki, M., Dietz, M., Dressler, R., Dupont, E., Durán, I., Eleme, Z., Fargier, S., Fernández, B., Fernández-Domínguez, B., Finocchiaro, P., Fiore, S., García-Infantes, F., Gawlik-Ramięga, A., Gervino, G., Gilardoni, S., González-Romero, E., Guerrero, C., Gunsing, F., Gustavino, C., Heyse, J., Hillman, W., Jenkins, D. G., Jericha, E., (0000-0001-7703-2471) Junghans, A., Kadi, Y., Kaperoni, K., Käppeler, F., Kaur, G., Kimura, A., Knapová, I., Köster, U., Kokkoris, M., Krtička, M., Kyritsis, N., Lederer-Woods, C., Lerner, G., Manna, A., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E. A., Mazzone, A., Mendoza, E., Mengoni, A., Milazzo, P. M., Mönch, I., Mucciola, R., Murtas, F., Musacchio-Gonzalez, E., Musumarra, A., Negret, A., Pérez, D. R. A., Pérez-Maroto, P., Patronis, N., Pavón-Rodríguez, J. A., Pellegriti, M. G., Perkowski, J., Petrone, C., Pirovano, E., Plaza, J., Pomp, S., Porras, I., Praena, J., Quesada, J. M., Reifarth, R., Rochman, D., Romanets, Y., Rubbia, C., Sánchez, A., Sabaté-Gilarte, M., Schillebeeckx, P., Schumann, D., Sekhar, A., Smith, A. G., Sosnin, N. V., Stamati, M., Sturniolo, A., Tagliente, G., Tarrío, D., Torres-Sánchez, P., (0000-0002-1400-4120) Turko, J. A. B., Urlass, S., Vagena, E., Valenta, S., Variale, V., Vaz, P., Vecchio, G., Vescovi, D., Vlachoudis, V., Vlastou, R., (0000-0003-2804-3670) Wallner, A., Woods, P. J., Wright, T., Zarrella, R., and Žugec, P.

Published
2023

106. Lifetime measurements in Nb99 and Zr99 : Investigation of shape coexistence

Author

Pfeil, A., Nomura, K., Gavrielov, N., Régis, J.-M., Köster, U., Kim, Y. H., Esmaylzadeh, A., Harter, A., Jolie, J., Knafla, L., Ley, M., Karayonchev, V., Pfeil, A., Nomura, K., Gavrielov, N., Régis, J.-M., Köster, U., Kim, Y. H., Esmaylzadeh, A., Harter, A., Jolie, J., Knafla, L., Ley, M., and Karayonchev, V.

Abstract

The ≈100 mass region is of special interest due to a rapid shape transition, observed by going from neutron number 58 to 60, especially pronounced in the Zr isotopes, where 98Zr is weakly and 100Zr is strongly deformed. To further examine this intricate phenomenon, in this work lifetimes of low-lying excited states in the nuclei 99Zr and 99Nb were determined using fast-timing techniques and an experimental setup consisting of four LaBr3⁢(Ce) detectors. Neutron rich =99 fragments were produced in neutron induced fission and separated by the spectrometer LOHENGRIN at the Institut Laue-Langevin in Grenoble, France. Experimental values are compared to two different calculations in the framework of the interacting boson-fermion model and discussed in the context of shape coexistence.

Published
2023

107. 40Ar proposed as probe of neutron-induced reactions in a high-density stellar-like plasma at the National Ignition Facility

Author

Paul, M., Sahoo, S. N., Tessler, M., Jeet, J., Velsko, C., Zylstra, A., Avila, M., Dickerson, C., Fougeres, C., Jayatissa, H., Pardo, R. C., Rehm, K. E., Scott, R., Toltsukhin, I., Vondrasek, R., Bailey, T., Callahan, L., Clark, A. M., Collon, P., Kashiv, Y., Nelson, A., Köster, U., Hoffmann, H. F. R., Pichotta, M., Zuber, K., Döring, T., (0000-0002-7620-8882) Schwengner, R., Paul, M., Sahoo, S. N., Tessler, M., Jeet, J., Velsko, C., Zylstra, A., Avila, M., Dickerson, C., Fougeres, C., Jayatissa, H., Pardo, R. C., Rehm, K. E., Scott, R., Toltsukhin, I., Vondrasek, R., Bailey, T., Callahan, L., Clark, A. M., Collon, P., Kashiv, Y., Nelson, A., Köster, U., Hoffmann, H. F. R., Pichotta, M., Zuber, K., Döring, T., and (0000-0002-7620-8882) Schwengner, R.

Abstract

The thermodynamical conditions of plasma density, temperature, pressure and the neutron density produced in a laser-induced implosion of a deuterium-tritium (DT) filled capsule at the National Ignition Facility (NIF) are the closest laboratory analog of stellar conditions. We plan to investigate neutron-induced reactions on 40Ar, namely the 40Ar(n, 2n)39Ar(t1/2 =268 y), the 40Ar(n,gamma)41Ar(110 min) and the potential rapid two-neutron capture reaction 40Ar(2n,gamma)42Ar(33 y) in the same implosion on an Ar-loaded DT capsule. The chemical inertness of noble gas Ar enables reliable collection of the reaction products. We describe here the technique of Noble-Gas Accelerator Mass Spectrometry (NOGAMS) to be used for ultra-sensitive detection of the long-lived 39Ar and 42Ar at Argonne National Laboratory. A 42Ar(33 y) sample was produced via the slow two-neutron capture reaction 40Ar(2n, gamma)42Ar in a high thermal-neutron flux irradiation. 39Ar and for the first time 42Ar atoms were directly detected in the abundance range 10^-12 -- 10^-13 . The present sensitivity of 42Ar detection is of the order of 104 atoms.

Published
2023

108. Production of neptunium and plutonium nuclides from uranium carbide using 1.4-GeV protons

Author

Au, M., primary, Athanasakis-Kaklamanakis, M., additional, Nies, L., additional, Heinke, R., additional, Chrysalidis, K., additional, Köster, U., additional, Kunz, P., additional, Marsh, B., additional, Mougeot, M., additional, Schweikhard, L., additional, Stegemann, S., additional, Vila Gracia, Y., additional, Düllmann, Ch. E., additional, and Rothe, S., additional

Published
2023
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110. The electron capture in 163Ho experiment – ECHo

Author

Gastaldo, L., Blaum, K., Chrysalidis, K., Day Goodacre, T., Domula, A., Door, M., Dorrer, H., Düllmann, Ch. E., Eberhardt, K., Eliseev, S., Enss, C., Faessler, A., Filianin, P., Fleischmann, A., Fonnesu, D., Gamer, L., Haas, R., Hassel, C., Hengstler, D., Jochum, J., Johnston, K., Kebschull, U., Kempf, S., Kieck, T., Köster, U., Lahiri, S., Maiti, M., Mantegazzini, F., Marsh, B., Neroutsos, P., Novikov, Yu. N., Ranitzsch, P. C. O., Rothe, S., Rischka, A., Saenz, A., Sander, O., Schneider, F., Scholl, S., Schüssler, R. X., Schweiger, Ch., Simkovic, F., Stora, T., Szücs, Z., Türler, A., Veinhard, M., Weber, M., Wegner, M., Wendt, K., and Zuber, K.

Published
2017
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111. Core-proton coupled nature of the 11/2+ state in 131 Sb probed by lifetime measurements

Author

Bottoni, S., primary, Gamba, E. R., additional, De Gregorio, G., additional, Gargano, A., additional, Leoni, S., additional, Fornal, B., additional, Brancadori, N., additional, Ciconali, G., additional, Crespi, F. C. L., additional, Cieplicka-Oryńczak, N., additional, Iskra, L. W., additional, Colombi, G., additional, Kim, Y.H., additional, Köster, U., additional, Michelagnoli, C., additional, Dunkel, F., additional, Esmaylzadeh, A., additional, Gerhard, L., additional, Jolie, J., additional, Knafla, L., additional, Ley, M., additional, Régis, J.-M., additional, Schomaker, K., additional, and Sferrazza, M., additional

Published
2023
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112. Testing the predictive power of realistic shell model calculations via lifetime measurement of the 11/2+ state in Sb131

Author

Bottoni, S., primary, Gamba, E. R., additional, De Gregorio, G., additional, Gargano, A., additional, Leoni, S., additional, Fornal, B., additional, Brancadori, N., additional, Ciconali, G., additional, Crespi, F. C. L., additional, Cieplicka-Oryńczak, N., additional, Iskra, Ł. W., additional, Colombi, G., additional, Kim, Y. H., additional, Köster, U., additional, Michelagnoli, C., additional, Dunkel, F., additional, Esmaylzadeh, A., additional, Gerhard, L., additional, Jolie, J., additional, Knafla, L., additional, Ley, M., additional, Régis, J.-M., additional, Schomaker, K., additional, and Sferrazza, M., additional

Published
2023
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113. First measurement of the 94Nb(n,γ) cross section at the CERN n_TOF facility

Author

Balibrea-Correa, J., primary, Babiano-Suárez, V., additional, Lerendegui-Marco, J., additional, Domingo-Pardo, C., additional, Ladarescu, I., additional, Tarifeño-Saldivia, A., additional, Alcayne, V., additional, Cano-Ott, D., additional, González-Romero, E., additional, Martínez, T., additional, Mendoza, E., additional, Guerrero, C., additional, Calviño, F., additional, Casanovas, A., additional, Köster, U., additional, Chiera, N. M., additional, Dressler, R., additional, Maugeri, E. A., additional, Schumann, D., additional, Aberle, O., additional, Altieri, S., additional, Amaducci, S., additional, Andrzejewski, J., additional, Bacak, M., additional, Beltrami, C., additional, Bennett, S., additional, Bernardes, A. P., additional, Berthoumieux, E., additional, Beyer, R., additional, Boromiza, M., additional, Bosnar, D., additional, Caamaño, M., additional, Calviani, M., additional, Cerutti, F., additional, Cescutti, G., additional, Chiaveri, E., additional, Colombetti, P., additional, Colonna, N., additional, Console Camprini, P., additional, Cortés, G., additional, Cortés-Giraldo, M. A., additional, Cosentino, L., additional, Cristallo, S., additional, Dellmann, S., additional, Di Castro, M., additional, Di Maria, S., additional, Diakaki, M., additional, Dietz, M., additional, Dupont, E., additional, Durán, I., additional, Eleme, Z., additional, Fargier, S., additional, Fernández, B., additional, Fernández-Domínguez, B., additional, Finocchiaro, P., additional, Fiore, S., additional, García-Infantes, F., additional, Gawlik-Ramięga, A., additional, Gervino, G., additional, Gilardoni, S., additional, Gunsing, F., additional, Gustavino, C., additional, Heyse, J., additional, Hillman, W., additional, Jenkins, D. G., additional, Jericha, E., additional, Junghans, A., additional, Kadi, Y., additional, Kaperoni, K., additional, Kaur, G., additional, Kimura, A., additional, Knapová, I., additional, Kokkoris, M., additional, Krtička, M., additional, Kyritsis, N., additional, Lederer-Woods, C., additional, Lerner, G., additional, Manna, A., additional, Masi, A., additional, Massimi, C., additional, Mastinu, P., additional, Mastromarco, M., additional, Mazzone, A., additional, Mengoni, A., additional, Michalopoulou, V., additional, Milazzo, P. M., additional, Mucciola, R., additional, Murtas, F., additional, Musacchio-Gonzalez, E., additional, Musumarra, A., additional, Negret, A., additional, Pérez de Rada, A., additional, Pérez-Maroto, P., additional, Patronis, N., additional, Pavón-Rodríguez, J. A., additional, Pellegriti, M. G., additional, Perkowski, J., additional, Petrone, C., additional, Pirovano, E., additional, Plaza, J., additional, Pomp, S., additional, Porras, I., additional, Praena, J., additional, Quesada, J. M., additional, Reifarth, R., additional, Rochman, D., additional, Romanets, Y., additional, Rubbia, C., additional, Sánchez-Caballero, A., additional, Sabaté-Gilarte, M., additional, Schillebeeckx, P., additional, Sekhar, A., additional, Smith, A. G., additional, Sosnin, N. V., additional, Stamati, M. E., additional, Sturniolo, A., additional, Tagliente, G., additional, Tarrío, D., additional, Torres-Sánchez, P., additional, Vagena, E., additional, Valenta, S., additional, Variale, V., additional, Vaz, P., additional, Vecchio, G., additional, Vescovi, D., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Woods, P. J., additional, Wright, T., additional, Zarrella, R., additional, and Žugec, P., additional

Published
2023
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114. New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements

Author

Lerendegui-Marco, J., primary, Babiano-Suárez, V., additional, Balibrea-Correa, J., additional, Domingo-Pardo, C., additional, Ladarescu, I., additional, Tarifeño-Saldivia, A., additional, Alcayne, V., additional, Cano-Ott, D., additional, González-Romero, E., additional, Martínez, T., additional, Mendoza, E., additional, Guerrero, C., additional, Calviño, F., additional, Casanovas, A., additional, Köster, U., additional, Chiera, N. M., additional, Dressler, R., additional, Maugeri, E. A., additional, Schumann, D., additional, Aberle, O., additional, Altieri, S., additional, Amaducci, S., additional, Andrzejewski, J., additional, Bacak, M., additional, Beltrami, C., additional, Bennett, S., additional, Bernardes, A. P., additional, Berthoumieux, E., additional, Beyer, R., additional, Boromiza, M., additional, Bosnar, D., additional, Caamaño, M., additional, Calviani, M., additional, Cerutti, F., additional, Cescutti, G., additional, Chiaveri, E., additional, Colombetti, P., additional, Colonna, N., additional, Console Camprini, P., additional, Cortés, G., additional, Cortés-Giraldo, M. A., additional, Cosentino, L., additional, Cristallo, S., additional, Dellmann, S., additional, Di Castro, M., additional, Di Maria, S., additional, Diakaki, M., additional, Dietz, M., additional, Dupont, E., additional, Durán, I., additional, Eleme, Z., additional, Fargier, S., additional, Fernández, B., additional, Fernández-Domínguez, B., additional, Finocchiaro, P., additional, Fiore, S., additional, García-Infantes, F., additional, Gawlik-Ramięga, A., additional, Gervino, G., additional, Gilardoni, S., additional, Gunsing, F., additional, Gustavino, C., additional, Heyse, J., additional, Hillman, W., additional, Jenkins, D. G., additional, Jericha, E., additional, Junghans, A., additional, Kadi, Y., additional, Kaperoni, K., additional, Kaur, G., additional, Kimura, A., additional, Knapová, I., additional, Kokkoris, M., additional, Krtička, M., additional, Kyritsis, N., additional, Lederer-Woods, C., additional, Lerner, G., additional, Manna, A., additional, Masi, A., additional, Massimi, C., additional, Mastinu, P., additional, Mastromarco, M., additional, Mazzone, A., additional, Mengoni, A., additional, Michalopoulou, V., additional, Milazzo, P. M., additional, Mucciola, R., additional, Murtas, F., additional, Musacchio-Gonzalez, E., additional, Musumarra, A., additional, Negret, A., additional, Pérez de Rada, A., additional, Pérez-Maroto, P., additional, Patronis, N., additional, Pavón-Rodríguez, J. A., additional, Pellegriti, M. G., additional, Perkowski, J., additional, Petrone, C., additional, Pirovano, E., additional, Plaza, J., additional, Pomp, S., additional, Porras, I., additional, Praena, J., additional, Quesada, J. M., additional, Reifarth, R., additional, Rochman, D., additional, Romanets, Y., additional, Rubbia, C., additional, Sánchez-Caballero, A., additional, Sabaté-Gilarte, M., additional, Schillebeeckx, P., additional, Sekhar, A., additional, Smith, A. G., additional, Sosnin, N. V., additional, Stamati, M. E., additional, Sturniolo, A., additional, Tagliente, G., additional, Tarrío, D., additional, Torres-Sánchez, P., additional, Vagena, E., additional, Valenta, S., additional, Variale, V., additional, Vaz, P., additional, Vecchio, G., additional, Vescovi, D., additional, Vlachoudis, V., additional, Vlastou, R., additional, Wallner, A., additional, Woods, P. J., additional, Wright, T., additional, Zarrella, R., additional, and Žugec, P., additional

Published
2023
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115. Germanium-gated γ–γ fast timing of excited states in fission fragments using the EXILL&FATIMA spectrometer

Author

Régis, J.-M., Simpson, G.S., Blanc, A., de France, G., Jentschel, M., Köster, U., Mutti, P., Paziy, V., Saed-Samii, N., Soldner, T., Ur, C.A., Urban, W., Bruce, A.M., Drouet, F., Fraile, L.M., Ilieva, S., Jolie, J., Korten, W., Kröll, T., Lalkovski, S., Mach, H., Mărginean, N., Pascovici, G., Podolyak, Zs., Regan, P.H., Roberts, O.J., Smith, J.F., Townsley, C., Vancraeyenest, A., and Warr, N.

Published
2014
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116. Probing the absolute neutrino mass scale with 163Ho: The HOLMES project

Author

De Gerone, M., Alpert, B., Becker, D., Bennett, D., Biasotti, M., Ceriale, V., Dressler, R., Faverzani, M., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Koester, U., Lusignoli, M., Mates, J., Nucciotti, A., Nisi, S., Orlando, A., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro Gomes, M., Schmidt, D., Schumann, D., Swetz, D., Ullom, J., and Vale, L.

Published
2019
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120. The HOLMES Experiment

Author

Faverzani, M., Alpert, B., Backer, D., Bennet, D., Biasotti, M., Brofferio, C., Ceriale, V., Ceruti, G., Corsini, D., Day, P. K., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Fumagalli, E., Gard, J., Gatti, F., Giachero, A., Hays-Wehle, J., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Maino, M., Mates, J., Nisi, S., Nizzolo, R., Nucciotti, A., Orlando, A., Parodi, L., Pessina, G., Pizzigoni, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schuman, D., Siccardi, F., Sisti, M., Swetz, D., Terranova, F., Ullom, J., and Vale, L.

Published
2016
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121. Recent Results for the ECHo Experiment

Author

Hassel, C., Blaum, K., Goodacre, T. Day, Dorrer, H., Düllmann, Ch. E., Eberhardt, K., Eliseev, S., Enss, C., Filianin, P., Fäßler, A., Fleischmann, A., Gastaldo, L., Goncharov, M., Hengstler, D., Jochum, J., Johnston, K., Keller, M., Kempf, S., Kieck, T., Köster, U., Krantz, M., Marsh, B., Mokry, C., Novikov, Yu. N., Ranitzsch, P. C. O., Rothe, S., Rischka, A., Runke, J., Saenz, A., Schneider, F., Scholl, S., Schüssler, R. X., Simkovic, F., Stora, T., Thörle-Pospiech, P., Türler, A., Veinhard, M., Wegner, M., Wendt, K., and Zuber, K.

Published
2016
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123. Measurements of Fission Products Yields with the LOHENGRIN mass spectrometer at ILL

Author

Chebboubi A., Julien-Laferrière S., Nicholson J., Kessedjian G., Serot O., Blanc A., Bernard D., Faust H., Kim Y.H., Köster U., Letourneau A., Litaize O., Méplan O., Mutti P., Rapala M., Ramdhane M., and Sage C.

Subjects
Physics, QC1-999
Abstract

The CEA in collaboration with ILL and LPSC has developed a measurement program on symmetric and heavy mass fission product distributions. The combination of measurements with ionisation chamber and Ge detectors is necessary to describe precisely the heavy fission product region in mass and charge. Recently, new measurements of fission yields and kinetic energy distributions, for different fissioning systems (233,235 U(nth, f),241 Am(2nth, f) and 239,241 Pu(nth, f), were performed with recoil spectrometer LOHENGRIN. The focus has been done on the self-normalization of the data to provide new absolute measurements, independently of any libraries along with the experimental covariance matrix. To reach precise measurements, a new experimental procedure was developed along with a new analysis method.

Published
2020
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124. Fission fragments observables measured at the LOHENGRIN spectrometer

Author

Julien-Laferrière S., Thombansen L., Kessedjian G., Chebboubi A., Serot O., Sage C., Méplan O., Ramdhane M., Litaize O., Nicholson J., Bernard D., Köster U., Mutti P., Materna T., and Rapala M.

Subjects
Physics, QC1-999
Abstract

Nuclear fission yields are key data for reactor studies, such as spent fuel inventory or decay heat, and for understanding fission process. Despite a significant effort allocated to measure fission yields during the last decades, the recent evaluated libraries still need improvements in particular in the reduction of the uncertainties. Moreover, some discrepancies between these libraries must be explained. Additional measurements provide complementary information and estimations of experimental correlations, and new kinds of measurements enable to test the models used during the nuclear data evaluation process. A common effort by the CEA, the LPSC and the ILL aims at tackling these issues by providing precise measurements of isotopic and isobaric fission yields with the related variance-covariance matrices. Additionally, the experimental program involves a large range of observables requested by the evaluations, such as kinetic energy dependency of isotopic yields and odd-even effect in order to test the sharing of total excitation energy and the spin generation mechanism. Another example is the complete range of isotopic distribution per mass that allows the determination of the charge polarization, which has to be consistent for complementary masses (pre-neutron emission). For instance, this information is the key observable for the evaluation of isotopic yields. Finally, ionic charge distributions are indirect measurements of nanosecond isomeric ratios as a probe of the nuclear de-excitation path in the (E*, J, π) representation. Measurements for thermal neutron induced fission of 241 Pu have been carried out at the ILL in Grenoble, using the LOHENGRIN mass spectrometer. Methods, results and comparison to models calculations will be presented corresponding to a status on fission fragments observables reachable with this facility.

Published
2020
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125. Coulomb excitation of neutron-rich beams at REX-ISOLDE

Author

Scheit, H., Niedermaier, O., Bildstein, V., Boie, H., Fitting, J., von Hahn, R., Köck, F., Lauer, M., Pal, U. K., Podlech, H., Repnow, R., Schwalm, D., Alvarez, C., Ames, F., Bollen, G., Emhofer, S., Habs, D., Kester, O., Lutter, R., Rudolph, K., Pasini, M., Thirolf, P. G., Wolf, B. H., Eberth, J., Gersch, G., Hess, H., Reiter, P., Thelen, O., Warr, N., Weisshaar, D., Aksouh, F., Van den Bergh, P., Van Duppen, P., Huyse, M., Ivanov, O., Mayet, P., Van de Walle, J., Äystö, J., Butler, P. A., Cederkäll, J., Delahaye, P., Fynbo, H. O. U., Fraile, L. M., Forstner, O., Franchoo, S., Köster, U., Nilsson, T., Oinonen, M., Sieber, T., Wenander, F., Pantea, M., Richter, A., Schrieder, G., Simon, H., Behrens, T., Gernhäuser, R., Kröll, T., Krücken, R., Münch, M., Davinson, T., Gerl, J., Huber, G., Hurst, A., Iwanicki, J., Jonson, B., Lieb, P., Liljeby, L., Schempp, A., Scherillo, A., Schmidt, P., Walter, G., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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126. New structure information on 30Mg, 31Mg and 32Mg

Author

ISOLDE Collaboration, Mach, H., Fraile, L. M., Tengblad, O., Boutami, R., Jollet, C., Płóciennik, W. A., Yordanov, D. T., Stanoiu, M., Borge, M. J. G., Butler, P. A., Cederkäll, J., Dessagne, Ph., Fogelberg, B., Fynbo, H., Hoff, P., Jokinen, A., Korgul, A., Köster, U., Kurcewicz, W., Marechal, F., Motobayashi, T., Mrazek, J., Neyens, G., Nilsson, T., Pedersen, S., Poves, A., Rubio, B., Ruchowska, E., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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127. Recent exploits of the ISOLTRAP mass spectrometer

Author

Kreim, S., Atanasov, D., Beck, D., Blaum, K., Böhm, Ch., Borgmann, Ch., Breitenfeldt, M., Cocolios, T.E., Fink, D., George, S., Herlert, A., Kellerbauer, A., Köster, U., Kowalska, M., Lunney, D., Manea, V., Minaya Ramirez, E., Naimi, S., Neidherr, D., Nicol, T., Rossel, R.E., Rosenbusch, M., Schweikhard, L., Stanja, J., Wienholtz, F., Wolf, R.N., and Zuber, K.

Published
2013
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128. New developments of the in-source spectroscopy method at RILIS/ISOLDE

Author

Marsh, B.A., Andel, B., Andreyev, A.N., Antalic, S., Atanasov, D., Barzakh, A.E., Bastin, B., Borgmann, Ch., Capponi, L., Cocolios, T.E., Day Goodacre, T., Dehairs, M., Derkx, X., De Witte, H., Fedorov, D.V., Fedosseev, V.N., Focker, G.J., Fink, D.A., Flanagan, K.T., Franchoo, S., Ghys, L., Huyse, M., Imai, N., Kalaninova, Z., Köster, U., Kreim, S., Kesteloot, N., Kudryavtsev, Yu., Lane, J., Lecesne, N., Liberati, V., Lunney, D., Lynch, K.M., Manea, V., Molkanov, P.L., Nicol, T., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Rosenbusch, M., Rossel, R.E., Rothe, S., Schweikhard, L., Seliverstov, M.D., Sels, S., Sjödin, A.M., Truesdale, V., Van Beveren, C., Van Duppen, P., Wendt, K., Wienholtz, F., Wolf, R.N., and Zemlyanoy, S.G.

Published
2013
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130. The generalized centroid difference method for picosecond sensitive determination of lifetimes of nuclear excited states using large fast-timing arrays

Author

Régis, J.-M., Mach, H., Simpson, G.S., Jolie, J., Pascovici, G., Saed-Samii, N., Warr, N., Bruce, A., Degenkolb, J., Fraile, L.M., Fransen, C., Ghita, D.G., Kisyov, S., Koester, U., Korgul, A., Lalkovski, S., Mărginean, N., Mutti, P., Olaizola, B., Podolyak, Z., Regan, P.H., Roberts, O.J., Rudigier, M., Stroe, L., Urban, W., and Wilmsen, D.

Published
2013
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132. New measurement of the 235U(nth,f) fission yields and development of a Time of Flight line at the LOHENGRIN spectrometer.

Author

Houdouin-Quenault, M., Sage, C., Méplan, O., Ramdhane, M., Dauvergne, D., Gallin-Martel, M.L., Muraz, J.F., Guillaudin, O., Marcatili, S., Kessedjian, G., Chebboubi, A., Serot, O., Litaize, O., Bernard, D., Köster, U., Kim, Y.H., Mutti, P., and Smith, A.G.

Subjects
NUCLEAR fission, TIME-of-flight spectrometers, NUCLEAR reactors, ACTINIDE elements, COVARIANCE matrices
Abstract

The study of nuclear fission yields has a major impact on the characterization and understanding of the fission process and is mandatory for reactor applications. In the framework of a collaboration between the CEA, the LPSC and the ILL, a program of actinide fission yield measurements has been ongoing for several years at the LOHENGRIN spectrometer. However, the measurement of very low fission yields in the symmetry region and the heavy wing of the distributions is difficult to achieve due to the strong contamination by other masses with much higher yields and requires the development of a new experimental setup. This paper will first present the results of a new absolute measurement of the 235U(nth,f) mass yields using an ionization chamber placed at the exit of the spectrometer. Although very well documented in the literature, these yields show uncertainties lying from 3% to 10% with large discrepancies between libraries and a lack of correlation matrices. New experimental data obtained at the LOHENGRIN spectrometer will be detailed, along with the measurement method and the production of the experimental covariance matrix. The second part will show the development of a Time of Flight (ToF) line in order to improve the background rejection in the mass yield measurements. In the symmetry region, the precision of the measurement is limited by the background estimation due to the charge exchanges with the residual gas of the separator. We plan to analyze the events using a triple coincidence (∆E x E) x ToF, whereas today only (∆E x E) selection is available. The new ToF line is built using Si3N4 foils and secondary electron detectors (SED) for the start and stop detectors. We will present the choices made for the SED technology along with the progress achieved on the ToF line characterization. [ABSTRACT FROM AUTHOR]

Published
2023
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133. The 41Ar(n,y)42Ar reaction.

Author

Sahoo, R. N., Paul, M., Köster, U., Scott, R., Tessler, M., Zylstra, A., Avila, M. L., Dickerson, C., Jayatissa, H., Kohen, M.S., McLain, J., Pardo, R.C., Rehm, K. E., Tolstukhin, I., Vondrasek, R., Bailey, T., Callahan, L., Clark, A., Collon, P., and Kashiv, Y.

Subjects
NUCLEAR cross sections, THERMAL neutron capture, ARGON isotopes, NUCLEAR reactors, MASS spectrometry
Abstract

The cross-section of the thermal neutron capture 41Ar(n,γ)42Ar(t1/2=32.9 y) reaction was measured by irradiating a 40Ar sample at the high-flux reactor of Institut Laue-Langevin (ILL) Grenoble, France. The signature of the two-neutron capture has been observed by measuring the growth curve and identifying the 1524.6 keV γ-lines of the shorter-lived 42K(12.4 h) β− daughter of 42Ar. Our preliminary value of the 41Ar(n,γ)42Ar thermal cross section is 240(80) mb at 25.3 meV. For the first time, direct counting of 42Ar was performed using the ultra-high sensitivity technique of noble gas accelerator mass spectrometry (NOGAMS) at Argonne National Laboratory, USA. [ABSTRACT FROM AUTHOR]

Published
2023
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134. The EXILL campaign

Author

FRANCE, G DE, BLANC, A, DROUET, F, JENTSCHEL, M, KÖSTER, U, MUTTI, P, RÉGIS, J M, SIMPSON, G, SOLDNER, T, STEZOWSKI, O, LEONI, S, URBAN, W, and VANCRAYENEST, A

Published
2015
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137. Lifetimes and transition probabilities for low-lying yrast levels in Te130,132

Author

Kumar, D., primary, Bhattacharjee, T., additional, Alam, S. S., additional, Basak, S., additional, Gerhard, L., additional, Knafla, L., additional, Esmaylzadeh, A., additional, Ley, M., additional, Dunkel, F., additional, Schomaker, K., additional, Régis, J. -M., additional, Jolie, J., additional, Kim, Y. H., additional, Köster, U., additional, Simpson, G. S., additional, and Fraile, L. M., additional

Published
2022
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138. New β -decay spectroscopy of the Te137 nucleus

Author

Si, M., primary, Lozeva, R., additional, Naïdja, H., additional, Blanc, A., additional, Daugas, J.-M., additional, Didierjean, F., additional, Duchêne, G., additional, Köster, U., additional, Kurtukian-Nieto, T., additional, Le Blanc, F., additional, Mutti, P., additional, Ramdhane, M., additional, and Urban, W., additional

Published
2022
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139. First measurement of the 94Nb(n,γ) cross section at the CERN n_TOF facility.

Author

Balibrea-Correa, J., Babiano-Suárez, V., Lerendegui-Marco, J., Domingo-Pardo, C., Ladarescu, I., Tarifeño-Saldivia, A., Alcayne, V., Cano-Ott, D., González-Romero, E., Martínez, T., Mendoza, E., Guerrero, C., Calviño, F., Casanovas, A., Köster, U., Chiera, N. M., Dressler, R., Maugeri, E. A., Schumann, D., and Aberle, O.

Subjects
NEUTRON capture, ISOTOPES, NUCLEAR astrophysics, NUCLEOSYNTHESIS, NUCLEAR reactions
Abstract

One of the crucial ingredients for the improvement of stellar models is the accurate knowledge of neutron capture cross-sections for the different isotopes involved in the s-,r- and i- processes. These measurements can shed light on existing discrepancies between observed and predicted isotopic abundances and help to constrain the physical conditions where these reactions take place along different stages of stellar evolution. In the particular case of the radioactive 94Nb, the 94Nb(n,γ) cross-section could play a role in the determination of the s-process production of 94Mo in AGB stars, which presently cannot be reproduced by state-of-the-art stellar models. There are no previous 94Nb(n,γ) experimental data for the resolved and unresolved resonance regions mainly due to the difficulties in producing highquality samples and also due to limitations in conventional detection systems commonly used in time-of-flight experiments. Motivated by this situation, a first measurement of the 94Nb(n,γ) reaction was carried out at CERN n_TOF, thereby exploiting the high luminosity of the EAR2 area in combination with a new detection system of small-volume C6D6-detectors and a high quality 94Nb-sample. The latter was based on hyper-pure 93Nb material activated at the high-flux reactor of ILL-Grenoble. An innovative ring-configuration detection system in close geometry around the capture sample allowed us to significantly enhance the signal-to-background ratio. This set-up was supplemented with two conventional C6D6-detectors and a highresolution LaCl3(Ce)-detector, which will be employed for addressing reliably systematic effects and uncertainties. At the current status of the data analysis, 18 resonance in 94Nb+n have been observed for the first time in the neutron energy range from thermal up to 10 keV. [ABSTRACT FROM AUTHOR]

Published
2023
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140. Status of fission fragment observables measured with the LOHENGRIN spectrometer

Author

Julien-Laferrière S., Thombansen L., Kessedjian G., Chebboubi A., Serot O., Sage C., Méplan O., Ramdhane M., Litaize O., Bernard D., Nicholson J., Blanc A., Faust H., Mutti P., Köster U., Letourneau A., Materna T., and Rapala M.

Subjects
Physics, QC1-999
Abstract

Nuclear fission yields are key parameters to evaluate reactor physics observables, such as fuel inventory, decay heat, spent fuel radiotoxicity, criticality but also for understanding the fission process. Despite a significant effort allocated to measure fission yields during the last decades, the recent evaluated libraries still need improvements in particular in the description of the uncertainties with the associated correlations. Additional kinds of measurements provide complementary information in order to test the models used in the nuclear data evaluation. Moreover, some discrepancies between these libraries must be explained. A common effort by the CEA, the LPSC and the ILL aims at tackling these issues by providing precise measurement of isotopic and isobaric fission yields with the related variance-covariance matrices. Nevertheless, the experimental program represents itself a large range of observables requested by the evaluations: isotopic yields, nuclear charge polarization, odd-even effect, isomeric ratio and their dependency with fission fragment kinetic energy as a probe of the nuclear de-excitation path in the (E*, Jπ) representation. Measurements for thermal neutron induced fission of 241Pu have been carried out at the Institut Laue Langevin using the LOHENGRIN mass spectrometer. Experimental program, observables reachable, results and comparison to model calculations are shown.

Published
2019
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142. ISOL beams of neutron-rich oxygen isotopes

Author

Köster, U., Arndt, O., Bergmann, U. C., Catherall, R., Cederkäll, J., Dillmann, I., Dubois, M., Durantel, F., Fraile, L., Franchoo, S., Gaubert, G., Gaudefroy, L., Hallmann, O., Huet-Equilbec, C., Jacquot, B., Jardin, P., Kratz, K. L., Lecesne, N., Leroy, R., Lopez, A., Maunoury, L., Pacquet, J. Y., Pfeiffer, B., Saint-Laurent, M. G., Stodel, C., Villari, A. C. C., Weissman, L., Gross, Carl J., editor, Nazarewicz, Witold, editor, and Rykaczewski, Krzysztof P., editor

Published
2005
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144. Decay modes of the 9/2- isomeric state in 183Tl

Author

Venhart, M., Andreyev, A. N., Cubiss, J. G., Wood, J. L., Barzakh, A. E., Van Beveren, C., Cocolios, T. E., de Groote, R. P., Fedorov, D. V., Fedosseev, V. N., Ferrer, R., Fink, D. A., Ghys, L., Huyse, M., Köster, U., Lane, J., Liberati, V., Lynch, K. M., Marsh, B. A., Molkanov, P. L., Procter, T. J., Rapisarda, E., Sandhu, K., Seliverstov, M. D., Sjödin, A. M., Van Duppen, P., and Veselský, M.

Subjects
Nuclear Physics - Experiment
Abstract

The internal transition decay and α decay of the $T_{1/2} = 53.3$ ms, $9/2^-$ isomeric state in the neutron-deficient isotope, $^{183}$Tl, have been studied using the Resonance Ionization Laser Ion Source and the Windmill detection setup at the ISOLDE facility at CERN. Clean samples of $^{183}$Tl were produced by selective laser ionization and subsequent mass separation. An internal transition cascade of 356.5–272.2 keV $\gamma$ rays has been identified. Multipolarities of these transitions have been determined by means of simultaneous $\gamma$-ray and conversion-electron spectroscopy. Improved data for the fine structure of the $^{183}$Tl → $^{179}$Au decay were deduced. This involves a 6058 keV $\alpha$-decay transition, which populates a previously unknown state in $^{179}$Au, that is tentatively assigned as a ($9/2^-$). It is interpreted as a coupling of the $1h_{9/2}$ proton-intruder with the excited $0^+$ state in the 178Pt core.

Published
2022

145. New β−decay spectroscopy of the $^{137 }$Te nucleus

Author

Si, M, Lozeva, R, Naïdja, H, Blanc, A, Daugas, J.-M, Didierjean, F, Duchêne, G, Köster, U, Kurtukian-Nieto, T, Le Blanc, F, Mutti, P, Ramdhane, M, Urban, W, 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), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), LaBoratoire d'Imagerie biOmédicale MultimodAle Paris-Saclay (BIOMAPS), Service Hospitalier Frédéric Joliot (SHFJ), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), University of Warsaw (UW), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Duchene, Gilbert

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; Background: Nuclear structure of the neutron-rich isotopes beyond 132 Sn is investigated. Purpose: The level scheme of 137 I is obtained after decay of 137 Te. Transitions in 136 I are detected after delayed neutron emission of 137 Te. The half life of 137 Te is measured. Methods:-delayed-ray spectroscopy is employed for neutron-rich 137 Sb and 137 Te isotopes, produced at the ILL after neutron-induced fission to populate excited states in 137 I. Results: The new decay level scheme of 137 I is established. The half lives of 137 Sb and 137 Te are determined as 0.57(26) s and 2.46(5) s, respectively. The-delayed neutron emission probability P limiting value of 137 Te is deduced to be 2.17(66)%. Conclusions: The experimental results are an important input to the theoretical description of nuclei in the region, being well interpreted within LSSM calculations and provide essential information on the firstforbidden transitions beyond > 82 and > 50.

Published
2022
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146. Status of the HOLMES Experiment

Author

Faverzani, M, Alpert, B, Balata, M, Backer, D, Bennet, D, Bevilaqua, A, Biasotti, M, Borghesi, M, Ceruti, G, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schumann, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Faverzani, M., Alpert, B., Balata, M., Backer, D., Bennet, D., Bevilaqua, A., Biasotti, M., Borghesi, M., Ceruti, G., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schumann, D., Siccardi, F., Swetz, D., Ullom, J., Vale, L., Faverzani, M, Alpert, B, Balata, M, Backer, D, Bennet, D, Bevilaqua, A, Biasotti, M, Borghesi, M, Ceruti, G, De Gerone, M, Dressler, R, Ferri, E, Fowler, J, Gallucci, G, Gard, J, Gatti, F, Giachero, A, Heinitz, S, Hilton, G, Köster, U, Lusignoli, M, Mates, J, Maugeri, E, Nisi, S, Nucciotti, A, Parodi, L, Pessina, G, Puiu, A, Ragazzi, S, Reintsema, C, Ribeiro-Gomez, M, Schmidt, D, Schumann, D, Siccardi, F, Swetz, D, Ullom, J, Vale, L, Faverzani, M., Alpert, B., Balata, M., Backer, D., Bennet, D., Bevilaqua, A., Biasotti, M., Borghesi, M., Ceruti, G., De Gerone, M., Dressler, R., Ferri, E., Fowler, J., Gallucci, G., Gard, J., Gatti, F., Giachero, A., Heinitz, S., Hilton, G., Köster, U., Lusignoli, M., Mates, J., Maugeri, E., Nisi, S., Nucciotti, A., Parodi, L., Pessina, G., Puiu, A., Ragazzi, S., Reintsema, C., Ribeiro-Gomez, M., Schmidt, D., Schumann, D., Siccardi, F., Swetz, D., Ullom, J., and Vale, L.

Abstract

The absolute neutrino mass is still an unknown parameter in the modern landscape of particle physics. The HOLMES experiment aims at exploiting the calorimetric approach to directly measure the neutrino mass through the kinematic measurement of the decay products of the weak process decay of 163Ho. This low energy decaying isotope, in fact, undergoes electron capture emitting a neutrino and leaving the daughter atom, 163Dy∗, in an atomic excited state. This, in turn, relaxes by emitting electrons and, to a considerably lesser extent, photons. The high-energy portion of the calorimetric spectrum of this decay is affected by the non-vanishing neutrino mass value. Given the small fraction of events falling within the region of interest, to achieve a high experimental sensitivity on the neutrino mass, it is important to have a high activity combined with a very small undetected pileup contribution. To achieve these targets, the final configuration of HOLMES foresees the deployment of a large number of 163Ho ion-implanted TESs characterized by an ambitiously high activity of 300 Hz each. In this paper, we outline the status of the major tasks that will bring HOLMES to achieve a statistical sensitivity on the neutrino mass as low as 2 eV/c2.

Published
2020

149. Decay modes of the 9/2− isomeric state in Tl183

Author

Venhart, M., primary, Andreyev, A. N., additional, Cubiss, J. G., additional, Wood, J. L., additional, Barzakh, A. E., additional, Van Beveren, C., additional, Cocolios, T. E., additional, de Groote, R. P., additional, Fedorov, D. V., additional, Fedosseev, V. N., additional, Ferrer, R., additional, Fink, D. A., additional, Ghys, L., additional, Huyse, M., additional, Köster, U., additional, Lane, J., additional, Liberati, V., additional, Lynch, K. M., additional, Marsh, B. A., additional, Molkanov, P. L., additional, Procter, T. J., additional, Rapisarda, E., additional, Sandhu, K., additional, Seliverstov, M. D., additional, Sjödin, A. M., additional, Van Duppen, P., additional, and Veselský, M., additional

Published
2022
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150. Measurement of the radiative capture cross section of the s-process branching points 204Tl and 171Tm at the n_TOF facility (CERN)

Author

Casanovas A., Domingo-Pardo C., Guerrero C., Lerendegui-Marco J., Calviño F., Tarifeño-Saldivia A., Dressler R., Heinitz S., Kivel N., Quesada J. M., Schumann D., Aberle O., Alcayne V., Andrzejewski J., Audouin L., Bécares V., Bacak M., Barbagallo M., Bečvář F., Bellia G., Berthoumieux E., Billowes J., Bosnar D., Brown A., Busso M., Caamaño M., Caballero-Ontanaya L., Calviani M., Cano-Ott D., Cerutti F., Chen Y. H., Chiaveri E., Colonna N., Cortés G., Cortés-Giraldo M. A., Cosentino L., Cristallo S., Damone L. A., Diakaki M., Dietz M., Dupont E., Durán I., Eleme Z., Fernández-Domínguez B., Ferrari A., Ferreira P., Finocchiaro P., Furman V., Göbel K., Gawlik A., Gilardoni S., Glodariu T., Gonçalves I. F., González-Romero E., Gunsing F., Heyse J., Jenkins D. G., Käppeler F., Kadi Y., Katabuchi T., Kimura A., Kokkoris M., Kopatch Y., Krtička M., Kurtulgil D., Ladarescu I., Lederer-Woods C., Meo S. Lo, Lonsdale S. J., Macina D., Martínez T., Masi A., Massimi C., Mastinu P., Mastromarco M., Matteucci F., Maugeri E. A., Mazzone A., Mendoza E., Mengoni A., Michalopoulou V., Milazzo P. M., Mingrone F., Musumarra A., Negret A., Nolte R., Ogállar F., Oprea A., Patronis N., Pavlik A., Perkowski J., Persanti L., Porras I., Praena J., Radeck D., Ramos D., Rauscher T., Reifarth R., Rochman D., Sabaté-Gilarte M., Saxena A., Schillebeeckx P., Simone S., Smith A. G., Sosnin N. V., Stamatopoulos A., Tagliente G., Tain J. L., Talip T., Tassan-Got L., Tsinganis A., Ulrich J., Valenta S., Vannini G., Variale V., Vaz P., Ventura A., Vlachoudis V., Vlastou R., Wallner A., Woods P. J., Wright T., Žugec P., and Köster U

Subjects
Physics, QC1-999
Abstract

The neutron capture cross section of some unstable nuclei is especially relevant for s-process nucleosynthesis studies. This magnitude is crucial to determine the local abundance pattern, which can yield valuable information of the s-process stellar environment. In this work we describe the neutron capture (n,γ) measurement on two of these nuclei of interest, 204Tl and 171Tm, from target production to the final measurement, performed successfully at the n_TOF facility at CERN in 2014 and 2015. Preliminary results on the ongoing experimental data analysis will also be shown. These results include the first ever experimental observation of capture resonances for these two nuclei.

Published
2018
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