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

Gawlik, A. and Lederer-Woods, C. and Andrzejewski, J. and Battino, U. and Ferreira, P. and Gunsing, F. and Heinitz, S. and Krticka, M. and Massimi, C. and Mingrone, F. and Perkowski, J. and Reifarth, R. and Tattersall, A. and Valenta, S. and Weiss, C. and Aberle, O. and Audouin, L. and Bacak, M. and Balibrea, J. and Barbagallo, M. and Barros, S. and Becares, V. and Becvar, F. and Beinrucker, C. and Berthoumieux, E. and Billowes, J. and Bosnar, D. and Brugger, M. and Caamano, M. and Calvino, F. and Calviani, M. and Cano-Ott, D. and Cardella, R. and Casanovas, A. and Castelluccio, D. M. and Cerutti, F. and Chen, Y. H. and Chiaveri, E. and Colonna, N. and Cortes, G. and Cortes-Giraldo, M. A. and Cosentino, L. and Damone, L. A. and Diakaki, M. and Dietz, M. and Domingo-Pardo, C. and Dressler, R. and Dupont, E. and Duran, I. and Fernandez-Dominguez, B. and Ferrari, A. and Finocchiaro, P. and Furman, V. and Goebel, K. and Garcia, A. R. and Glodariu, T. and Goncalves, I. F. and Gonzalez-Romero, E. and Goverdovski, A. and Griesmayer, E. and Guerrero, C. and Harada, H. and Heftrich, T. and Heyse, J. and Jenkins, D. G. and Jericha, E. and Kaeppeler, F. and Kadi, Y. and Katabuchi, T. and Kavrigin, P. and Ketlerov, V. and Khryachkov, V. and Kimura, A. and Kivel, N. and Knapova, I. and Kokkoris, M. and Leal-Cidoncha, E. and Leeb, H. and Lerendegui-Marco, J. and Lo Meo, S. and Lonsdale, S. J. and Losito, R. and Macina, D. and Marganiec, J. and Martinez, T. and Mastinu, P. and Mastromarco, M. and Matteucci, F. and Maugeri, E. A. and Mendoza, E. and Mengoni, A. and Milazzo, P. M. and Mirea, M. and Montesano, S. and Musumarra, A. and Nolte, R. and Oprea, A. and Patronis, N. and Pavlik, A. and Porras, J. and Praena, J. and Quesada, J. M. and Rajeev, K. and Rauscher, T. and Riego-Perez, A. and Rout, P. C. and Rubbia, C. and Ryan, J. A. and Sabate-Gilarte, M. and Saxena, A. and Schillebeeckx, P. and Schmidt, S. and Schumann, D. and Sedyshev, P. and Smith, A. G. and Stamatopoulos, A. and Tagliente, G. and Tain, J. L. and Tarifeno-Saldivia, A. and Tassan-Got, L. and Tsinganis, A. and Vannini, G. and Variale, V. and Vaz, P. and Ventura, A. and Vlachoudis, V. and Vlastou, R. and Wallner, A. and Warren, S. and Weigand, M. and Wolf, C. and Woods, P. J. and Wright, T. and Zugec, P.. (2019) Measurement of the Ge-70(n, gamma) cross section up to 300 keV at the CERN n_TOF facility. Physical Review C, 100 (4). 045804-045804.

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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.
Faculties and Departments:05 Faculty of Science > Departement Physik > Former Organization Units Physics > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Rauscher, Thomas
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:23 Sep 2020 14:37
Deposited On:23 Sep 2020 14:37

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