ACTA

Radiative Neutron Capture Cross-Section Measurement of Ge Isotopes at n_TOF CERN Facility and Its Importance for Stellar Nucleosynthesis

A. Gawlik^a, C. Lederer-Woods^b, J. Andrzejewski^a, J. Perkowski^a, U. Battino^b, P. Ferreira^c, F. Gunsing^{d, e}, S. Heinitz^f, M. Krtička^g, C. Massimi^{h, i}, F. Mingrone^h, R. Reifarth^j, A. Tattersall^b, S. Valenta^g, C. Weiss^{e, k}, O. Aberle^e, L. Audouin^l, M. Bacak^k, J. Balibrea^m, M. Barbagalloⁿ, S. Barros^c, V. Bécares^m, F. Bečvář^g, C. Beinrucker^j, E. Berthoumieux^d, J. Billowes^o, D. Bosnar^p, M. Brugger^e, M. Caamaño^q, F. Calviño^r, M. Calviani^e, D. Cano-Ott^m, R. Cardella^e, A. Casanovas^r, D.M. Castelluccio^{s, h}, F. Cerutti^e, Y.H. Chen^l, E. Chiaveri^e, N. Colonnaⁿ, G. Cortés^r, M.A. Cortés-Giraldo^t, L. Cosentino^u, L.A. Damone^{n, v}, M. Diakaki^d, M. Dietz^b, C. Domingo-Pardo^w, R. Dressler^f, E. Dupont^d, I. Durán^q, B. Fernández-Domínguez^q, A. Ferrari^e, P. Finocchiaro^u, V. Furman^x, K. Göbel^j, A.R. García^m, T. Glodariu^y, I.F. Gonçalves^c, E. González-Romero^m, A. Goverdovski^z, E. Griesmayer^k, C. Guerrero^t, H. Harada^aa, T. Heftrich^j, J. Heyse^bb, D.G. Jenkins^cc, E. Jericha^k, F. Käppeler^dd, Y. Kadi^e, T. Katabuchi^ee, P. Kavrigin^k, V. Ketlerov^z, V. Khryachkov^z, A. Kimura^aa, N. Kivel^f, I. Knapova^g, M. Kokkoris^ff, E. Leal-Cidoncha^q, H. Leeb^k, J. Lerendegui-Marco^t, S. Lo Meo^{s, h}, S.J. Lonsdale^b, R. Losito^e, D. Macina^e, T. Martínez^m, P. Mastinu^gg, M. Mastromarcoⁿ, F. Matteucci^{hh, ii}, E.A. Maugeri^f, E. Mendoza^m, A. Mengoni^s, P.M. Milazzo^hh, M. Mirea^y, S. Montesano^e, A. Musumarra^{u, jj}, R. Nolte^kk, A. Oprea^y, N. Patronis^ll, A. Pavlik^mm, J.I. Porras^{e, nn}, J. Praena^{t, nn}, J.M. Quesada^t, K. Rajeev^oo, T. Rauscher^{pp, qq}, A. Riego-Perez^r, P.C. Rout^oo, C. Rubbia^e, J.A. Ryan^o, M. Sabaté-Gilarte^{e, t}, A. Saxena^oo, P. Schillebeeckx^bb, S. Schmidt^j, D. Schumann^f, P. Sedyshev^x, A.G. Smith^o, A. Stamatopoulos^ff, G. Taglienteⁿ, J.L. Tain^w, A. Tarifeño-Saldivia^w, L. Tassan-Got^l, A. Tsinganis^ff, G. Vannini^{h, i}, V. Varialeⁿ, P. Vaz^c, A. Ventura^h, V. Vlachoudis^e, R. Vlastou^ff, A. Wallner^rr, S. Warren^o, M. Weigand^j, C. Wolf^j, P.J. Woods^b, T. Wright^o, P. Žugec^{p, e}, The n_TOF Collaboration (www.cern.ch/ntof)
^aUniversity of Lodz, Poland
^bSchool of Physics and Astronomy, University of Edinburgh, United Kingdom
^cInstituto Superior Técnico, Lisbon, Portugal
^dCEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
^eEuropean Organization for Nuclear Research (CERN), Switzerland
^fPaul Scherrer Institut (PSI), Villingen, Switzerland
^gCharles University, Prague, Czech Republic
^hIstituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
ⁱDipartimento di Fisica e Astronomia, Università di Bologna, Italy
^jGoethe University, Frankfurt, Germany
^kTechnische Universität Wien, Austria
^lInstitut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
^mCentro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
ⁿIstituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
^oUniversity of Manchester, United Kingdom
^pDepartment of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
^qUniversity of Santiago de Compostela, Spain
^rUniversitat Politècnica de Catalunya, Spain
^sAgenzia Nazionale per le Nuove Tecnologie (ENEA), Bologna, Italy
^tUniversidad de Sevilla, Spain
^uINFN, Laboratori Nazionali del Sud, Catania, Italy
^vDipartimento di Fisica, Università degli Studi di Bari, Italy
^wInstituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
^xJoint Institute for Nuclear Research (JINR), Dubna, Russia
^yHoria Hulubei National Institute of Physics and Nuclear Engineering, Romania
^zInstitute of Physics and Power Engineering (IPPE), Obninsk, Russia
^aaJapan Atomic Energy Agency (JAEA), Tokai-mura, Japan
^bbEuropean Commission, Joint Research Centre, Geel, Retieseweg 111, B-2440 Geel, Belgium
^ccUniversity of York, United Kingdom
^ddKarlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
^eeTokyo Institute of Technology, Japan
^ffNational Technical University of Athens, Greece
^ggIstituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
^hhIstituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
ⁱⁱDipartimento di Astronomia, Università di Trieste, Italy
^jjDipartimento di Fisica e Astronomia, Università di Catania, Italy
^kkPhysikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
^llUniversity of Ioannina, Greece
^mmUniversity of Vienna, Faculty of Physics, Vienna, Austria
ⁿⁿUniversity of Granada, Spain
^ooBhabha Atomic Research Centre (BARC), India
^ppCentre for Astrophysics Research, University of Hertfordshire, United Kingdom
^qqDepartment of Physics, University of Basel, Switzerland
^rrAustralian National University, Canberra, Australia

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This manuscript summarizes the results of radiative neutron capture cross-section measurements on two stable germanium isotopes, ⁷⁰Ge and ⁷³Ge. Experiments were performed at the n_TOF facility at CERN via the time-of-flight technique, over a wide neutron energy range, for all stable germanium isotopes (70,72,73,74, and 76). Results for ⁷⁰Ge [Phys. Rev. C 100, 045804 (2019)] and ⁷³Ge [Phys. Lett. B 790, 458 (2019)] are already published. In the field of nuclear structure, such measurements allow to study excited levels close to the neutron binding energy and to obtain information on nuclear properties. In stellar nucleosynthesis research, neutron induced reactions on germanium are of importance for nucleosynthesis in the weak component of the slow neutron capture processes.

DOI:10.12693/APhysPolA.139.383
topics: n_TOF, neutron time-of-flight, neutron capture cross-section, MACS