1. Time-of-flight and activation experiments on 147Pm and 171Tm for astrophysics
- Author
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E. Leal-Cidoncha, P. M. Milazzo, M. Mastromarco, Rene Reifarth, O. Aberle, Simone Gilardoni, A. Gawlik, J. M. Quesada-Molina, Thomas Rauscher, D. Radeck, Michael Paul, J. Marganiec, R. Cardella, E. Berthoumieux, Javier Praena, S. Lo Meo, Leonid Weissman, M. Diakaki, M. Kokkoris, A. S. Brown, L. Tassan-Got, Anton Wallner, M. Caamaño, F. Cerutti, M. Tessler, L. Cosentino, J. Balibrea, S. Valenta, G. Cortes, A. Stamatopoulos, Deniz Kurtulgil, A. Oprea, N. V. Sosnin, J. Heyse, Marco Calviani, F. Mingrone, J. Andrzejewski, A. G. Smith, A. Kimura, D. Macina, Ariel Tarifeño-Saldivia, S. J. Lonsdale, J. L. Tain, A. Saxena, A. R. García, F. Gunsing, N. Patronis, Annamaria Mazzone, Petar Žugec, M. Bacak, I. Duran, P. Schillebeeckx, Philip Woods, S. Halfon, A. Casanovas, P. F. Mastinu, Ulli Köster, J. Lerendegui-Marco, P. Ferreira, Hideo Harada, Alfredo Ferrari, Mario Barbagallo, S. Warren, R. Dressler, Cristian Massimi, V. Variale, A. Kalamara, C. Weiss, D. Schumann, R. Vlastou, G. Tagliente, P. Kavrigin, I. F. Gonçalves, M. Sabaté-Gilarte, P. C. Rout, E. Mendoza, Y. H. Chen, Alexandru Negret, E. Griesmayer, R. Nolte, L. A. Damone, S. Heinitz, F. Becvar, A. Tsinganis, C. Lederer, A. Masi, E. Jericha, T. Glodariu, Paolo Finocchiaro, Damir Bosnar, Y. Kadi, F. Käppeler, J. A. Ryan, D. G. Jenkins, E. A. Maugeri, K. Göbel, N. Kivel, Ignacio Porras, Nicola Colonna, E. Dupont, G. Vannini, T. Wright, M. Krtička, E. González, M. A. Cortés-Giraldo, B. Fernández-Domínguez, T. Martinez, F. Calviño, L. Audouin, H. Leeb, Alberto Mengoni, J. Perkowski, Carlo Rubbia, V. Vlachoudis, Carlos Guerrero, P. Vaz, Alberto Ventura, A. Musumarra, E. Chiaveri, D. Cano-Ott, A. Pavlik, C. Domingo-Pardo, J. Billowes, Universitat Politècnica de Catalunya. Departament de Física, Universitat Politècnica de Catalunya. Institut de Tècniques Energètiques, Universitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group, Universitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia, Vannini, G., Mengoni, A., Lo Meo, S., Guerrero, C., Lerendegui-Marco, J., Domingo-Pardo, C., Casanovas, A., Dressler, R., Halfon, S., Heinitz, S., Kivel, N., Köster, U., Paul, M., Quesada-Molina, J.M., Schumann, D., Tarifeño-Saldivia, A., Tessler, M., Weissman, L., Aberle, O., Andrzejewski, J., Audouin, L., Bacak, M., Balibrea, J., Barbagallo, M., Becvar, F., Berthoumieux, E., Billowes, J., Bosnar, D., Brown, A., Caamaño, M., Calviño, F., Calviani, M., Cano-Ott, D., Cardella, R., Cerutti, F., Chen, Y.H., Chiaveri, E., Colonna, N., Cortés, G., Cortés-Giraldo, M.A., Cosentino, L., Damone, L.A., Diakaki, M., Dupont, E., Durán, I., Fernández-Domínguez, B., Ferrari, A., Ferreira, P., Finocchiaro, P., Göbel, K., García, A.R., Gawlik, A., Gilardoni, S., Glodariu, T., Gonçalves, I.F., González, E., Griesmayer, E., Gunsing, F., Harada, H., Heyse, J., Jenkins, D.G., Jericha, E., Käppeler, F., Kadi, Y., Kalamara, A., Kavrigin, P., Kimura, A., Kokkoris, M., Krticka, M., Kurtulgil, D., Leal-Cidoncha, E., Lederer, C., Leeb, H., Meo, S. Lo, Lonsdale, S.J., Macina, D., Marganiec, J., Martínez, T., Masi, A., Massimi, C., Mastinu, P., Mastromarco, M., Maugeri, E.A., Mazzone, A., Mendoza, E., Milazzo, P.M., Mingrone, F., Musumarra, A., Negret, A., Nolte, R., Oprea, A., Patronis, N., Pavlik, A., Perkowski, J., Porras, I., Praena, J., Radeck, D., Rauscher, T., Reifarth, R., Rout, P.C., Rubbia, C., Ryan, J.A., Sabaté-Gilarte, M., Saxena, A., Schillebeeckx, P., Smith, A.G., Sosnin, N.V., Stamatopoulos, A., Tagliente, G., Tain, J.L., Tassan-Got, L., Tsinganis, A., Valenta, S., Variale, V., Vaz, P., Ventura, A., Vlachoudis, V., Vlastou, R., Wallner, A., Warren, S., Weiss, C., Woods, P.J., Wright, T., Ugec, P., and Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
- Subjects
QC1-999 ,Neutron ,Scintillator ,01 natural sciences ,Nuclear physics ,Physics and Astronomy (all) ,Stellar nucleosynthesis ,Nucleosynthesis ,0103 physical sciences ,Neutron cross section ,010306 general physics ,Nuclear Experiment ,Physics ,Energies::Energia nuclear [Àrees temàtiques de la UPC] ,Neutrons ,Isotope ,Física [Àrees temàtiques de la UPC] ,010308 nuclear & particles physics ,Tof ,Time of flight ,Neutron capture ,13. Climate action ,Nucleosíntesi - Abstract
The neutron capture cross section of several key unstable isotopes acting as branching points in the s-process are crucial for stellar nucleosynthesis studies, but they are very challenging to measure due to the difficult production of sufficient sample material, the high activity of the resulting samples, and the actual (n,γ ) measurement, for which high neutron fluxes and effective background rejection capabilities are required. As part of a new program to measure some of these important branching points, radioactive targets of 147Pm and 171Tm have been produced by irradiation of stable isotopes at the ILL high flux reactor. Neutron capture on 146Nd and 170Er at the reactor was followed by beta decay and the resulting matrix was purified via radiochemical separation at PSI. The radioactive targets have been used for time-of-flight measurements at the CERN n TOF facility using the 19 and 185m beam lines during 2014 and 2015. The capture cascades were detected using a set of four C6D6 scintillators, allowing to observe the associated neutron capture resonances. The results presented in this work are the first ever determination of the resonance capture cross section of 147Pm and 171Tm. Activation experiments on the same 147Pm and 171Tm targets with a high-intensity 30 keV quasi-Maxwellian flux of neutrons will be performed using the SARAF accelerator and the Liquid-Lithium Target (LiLiT) in order to extract the corresponding Maxwellian Average Cross Section (MACS). The status of these experiments and preliminary results will be presented and discussed as well., The authors acknowledge financial support by Spanish FPA2013-45083-P and FPA2014-53290-C2-2-P projects and the EC FP7 projects NeutAndalus (Grant No. 334315) and CHANDA (Grant No. 605203).
- Published
- 2017