Destruction of the cosmic γ-ray emitter Al-26 in massive stars: Study of the key Al-26 (n,α) reaction

Author(s)

, C. Lederer-Woods, P. J. Woods, T. Davinson, A. Estrade, J. Heyse, D. Kahl, S. J. Lonsdale, C. Paradela, P. Schillebeeckx, O. Aberle, S. Amaducci, J. Andrzejewski, L. Audouin, M. Bacak, J. Balibrea, M. Barbagallo, F. Bečvář, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, S. Cristallo, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Ferreira, F. J. Ferrer, P. Finocchiaro, V. Furman, A. Pavlik, A. Wallner

Abstract

Neutron destruction reactions of the cosmic γ-ray emitter 26Al are of importance to determine the amount of 26Al ejected into our galaxy by supernova explosions and for 26Al production in asymptotic giant branch stars. We performed a new measurement of the 26Al(n,α) reaction up to 160-keV neutron energy at the neutron time-of-flight facilities n_TOF at CERN and GELINA at EC-JRC. We provide strengths for ten resonances, six of them for the first time. We use our data to calculate astrophysical reactivities for stellar temperatures up to 0.7 GK. Our results resolve a discrepancy between the two previous direct measurements of this reaction, and indicate higher stellar destruction rates than the most recently recommended reactivity.

Organisation(s)

Isotope Physics

External organisation(s)

University of Edinburgh, Commiss European Communities, Joint Res Ctr, Inst Reference Mat & Measurements, European Organization for Nuclear Research (CERN), Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bologna, University of Bologna, University of Lodz, Université Paris XI - Paris-Sud, Université Paris Saclay, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Bari, Charles University Prague, University of Manchester, University of Zagreb, University of York, Universidade de Santiago de Compostela (USC), Universitat Politècnica de Catalunya, Universidad de Sevilla, INFN Laboratori Nazionali del Sud, Istituto Nazionale di Fisica Nucleare (INFN), Roma, INAF - Osservatorio Astronomico d'Abruzzo, Università degli Studi di Bari Aldo Moro, Universitat de València, Paul Scherrer Institute, Spanish National Research Council (CSIC), Joint Institute for Nuclear Research, Australian National University, Instituto Superior Técnico

Journal

Physical Review C

Volume

104

No. of pages

6

ISSN

2469-9985

DOI

https://doi.org/10.1103/PhysRevC.104.L032803

Publication date

09-2021

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

Keywords

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/96f69b3f-1c18-4e28-9300-c9a92a441e50