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Destruction of the cosmic γ-ray emitter Al26 in massive stars: Study of the key Al26(n,p) reaction

C. Lederer-Woods1,*, P. J. Woods1, T. Davinson1, D. Kahl1,†, S. J. Lonsdale1, O. Aberle2, S. Amaducci3,4, J. Andrzejewski5, L. Audouin6 et al. (n_TOF Collaboration)

L. Audouin6, M. Bacak7,2,8, J. Balibrea9, M. Barbagallo10, F. Bečvář11, E. Berthoumieux8, J. Billowes12, D. Bosnar13, A. Brown14, M. Caamaño15, F. Calviño16, M. Calviani2, D. Cano-Ott9, R. Cardella2, A. Casanovas16, F. Cerutti2, Y. H. Chen6, E. Chiaveri2,12,17, N. Colonna10, G. Cortés16, M. A. Cortés-Giraldo17, L. Cosentino18, S. Cristallo19,20, L. A. Damone10,21, M. Diakaki8, C. Domingo-Pardo22, R. Dressler23, E. Dupont8, I. Durán15, B. Fernández-Domínguez15, A. Ferrari2, P. Ferreira24, F. J. Ferrer25, P. Finocchiaro18, V. Furman26, K. Göbel27, A. R. García9, A. Gawlik5, S. Gilardoni2, T. Glodariu28, I. F. Gonçalves24, E. González-Romero9, E. Griesmayer7, C. Guerrero17, F. Gunsing8,2, H. Harada29, S. Heinitz23, J. Heyse30, D. G. Jenkins14, E. Jericha7, F. Käppeler31, Y. Kadi2, A. Kalamara32, P. Kavrigin7, A. Kimura29, N. Kivel23, M. Kokkoris32, M. Krtička11, D. Kurtulgil27, E. Leal-Cidoncha15, H. Leeb7, J. Lerendegui-Marco17, S. Lo Meo33,3, D. Macina2, A. Manna3,4, J. Marganiec5,34, T. Martínez9, A. Masi2, C. Massimi3,4, P. Mastinu35, M. Mastromarco10, E. A. Maugeri23, A. Mazzone10,36, E. Mendoza9, A. Mengoni33, P. M. Milazzo37, F. Mingrone2, A. Musumarra18,38, A. Negret28, R. Nolte34, A. Oprea28, N. Patronis39, A. Pavlik40, J. Perkowski5, I. Porras41, J. Praena41, J. M. Quesada17, D. Radeck34, T. Rauscher42,43, R. Reifarth27, C. Rubbia2, J. A. Ryan12, M. Sabaté-Gilarte2,17, A. Saxena44, P. Schillebeeckx30, D. Schumann23, P. Sedyshev26, A. G. Smith12, N. V. Sosnin12, A. Stamatopoulos32, G. Tagliente10, J. L. Tain22, A. Tarifeño-Saldivia16, L. Tassan-Got6, S. Valenta11, G. Vannini3,4, V. Variale10, P. Vaz24, A. Ventura3, V. Vlachoudis2, R. Vlastou32, A. Wallner45, S. Warren12, C. Weiss7, T. Wright12, and P. Žugec13,2 (n_TOF Collaboration)

  • 1School of Physics and Astronomy, University of Edinburgh, Peter Guthrie Tait Road, EH9 3FD Edinburgh, United Kingdom
  • 2European Organization for Nuclear Research (CERN), Switzerland
  • 3Istituto Nazionale di Fisica Nucleare, Sezione di Bologna, Italy
  • 4Dipartimento di Fisica e Astronomia, Università di Bologna, Italy
  • 5University of Lodz, Poland
  • 6Institut de Physique Nucléaire, CNRS-IN2P3, Univ. Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, France
  • 7Technische Universität Wien, Austria
  • 8CEA Irfu, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
  • 9Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Spain
  • 10Istituto Nazionale di Fisica Nucleare, Sezione di Bari, Italy
  • 11Charles University, Prague, Czech Republic
  • 12University of Manchester, United Kingdom
  • 13Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
  • 14University of York, United Kingdom
  • 15University of Santiago de Compostela, Spain
  • 16Universitat Politècnica de Catalunya, Spain
  • 17Universidad de Sevilla, Spain
  • 18INFN Laboratori Nazionali del Sud, Catania, Italy
  • 19Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Italy
  • 20Istituto nazionale di Astrofisica - Osservatorio Astronomico d'Abruzzo, Italy
  • 21Dipartimento di Fisica, Università degli Studi di Bari, Italy
  • 22Instituto de Física Corpuscular, CSIC - Universidad de Valencia, Spain
  • 23Paul Scherrer Institut (PSI), Villingen, Switzerland
  • 24Instituto Superior Técnico, Lisbon, Portugal
  • 25Centro Nacional de Aceleradores (U. Sevilla, J. Andalucia, CSIC), Spain
  • 26Joint Institute for Nuclear Research (JINR), Dubna, Russia
  • 27Goethe University Frankfurt, Germany
  • 28Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania
  • 29Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
  • 30European Commission, Joint Research Centre, Geel, Retieseweg 111, B-2440 Geel, Belgium
  • 31Karlsruhe Institute of Technology, Campus North, IKP, 76021 Karlsruhe, Germany
  • 32National Technical University of Athens, Greece
  • 33Agenzia nazionale per le nuove tecnologie (ENEA), Bologna, Italy
  • 34Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
  • 35Istituto Nazionale di Fisica Nucleare, Sezione di Legnaro, Italy
  • 36Consiglio Nazionale delle Ricerche, Bari, Italy
  • 37Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Italy
  • 38Dipartimento di Fisica e Astronomia, Università di Catania, Italy
  • 39University of Ioannina, Greece
  • 40University of Vienna, Faculty of Physics, Vienna, Austria
  • 41University of Granada, Spain
  • 42Department of Physics, University of Basel, Switzerland
  • 43Centre for Astrophysics Research, University of Hertfordshire, United Kingdom
  • 44Bhabha Atomic Research Centre (BARC), India
  • 45Australian National University, Canberra, Australia

  • *claudia.lederer-woods@ed.ac.uk
  • †Present address: Extreme Light Infrastructure - Nuclear Physics, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH), 077125 Bucharest-Magurele, Romani.
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Phys. Rev. C 104, L022803 – Published 30 August, 2021

DOI: https://doi.org/10.1103/PhysRevC.104.L022803

Abstract

The Al26(n,p)Mg26 reaction is the key reaction impacting on the abundances of the cosmic γ-ray emitter Al26 produced in massive stars and impacts on the potential pollution of the early solar system with Al26 by asymptotic giant branch stars. We performed a measurement of the Al26(n,p)Mg26 cross section at the high-flux beam line EAR-2 at the n_TOF facility (CERN). We report resonance strengths for eleven resonances, nine being measured for the first time, while there is only one previous measurement for the other two. Our resonance strengths are significantly lower than the only previous values available. Our cross-section data range to 150 keV neutron energy, which is sufficient for a reliable determination of astrophysical reactivities up to 0.5 GK stellar temperature.

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Phys. Rev. C 104, L022803– Published 30 August, 2021
  • Received 22 January 2021
  • Accepted 9 August 2021
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