Measurement of ⁷³Ge(n,γ) cross sections and implications for stellar nucleosynthesis

Autor(en)

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

Abstrakt

⁷³Ge(n,γ) cross sections were measured at the neutron time-of-flight facility n_TOF at CERN up to neutron energies of 300 keV, providing for the first time experimental data above 8 keV. Results indicate that the stellar cross section at kT=30 keV is 1.5 to 1.7 times higher than most theoretical predictions. The new cross sections result in a substantial decrease of ⁷³Ge produced in stars, which would explain the low isotopic abundance of ⁷³Ge in the solar system.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

University of Edinburgh, Johann Wolfgang Goethe-Universität Frankfurt am Main, Associação EURATOM/IST, University of Lodz, Universidad de Sevilla, Université Paris-Saclay, European Organization for Nuclear Research (CERN), Paul Scherrer Institute, ENEA Centro Ricerche Bologna, Charles University Prague, Technische Universität Wien, Centre National De La Recherche Scientifique (CNRS), Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Istituto Nazionale di Fisica Nucleare, Roma, University of Zagreb, Universidade de Santiago de Compostela (USC), Universitat Politècnica de Catalunya, Laboratori Nazionali del Sud, Università degli Studi di Bari, Bhabha Atomic Research Centre, National Technical University of Athens (NTUA), Universitat de València, Dubna, Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN HH), Obninsk, Japan Atomic Energy Agency, European Commission, York University, Karlsruher Institut für Technologie, Tokyo Institute of Technology (TIT), Università degli Studi di Bologna, Università degli Studi di Trieste, Università degli Studi di Catania, Physikalisch-Technische Bundesanstalt (PTB), University of Ioannina, Universidad de Granada, University of Hertfordshire, Universität Basel, Australian National University, University of Manchester, Manchester Metropolitan University

Journal

Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics

Band

790

Seiten

458-465

Anzahl der Seiten

8

ISSN

0370-2693

DOI

https://doi.org/10.1016/j.physletb.2019.01.045

Publikationsdatum

03-2019

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

Schlagwörter

ASJC Scopus Sachgebiete

Nuclear and High Energy Physics

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/measurement-of-73gen-cross-sections-and-implications-for-stellar-nucleosynthesis(194928ca-5c47-463d-a239-266ed668d577).html