Measurement of the ⁷⁷Se (n,γ) cross section up to 200 keV at the n_TOF facility at CERN

Author(s)

, N. V. Sosnin, C. Lederer-Woods, M. Krtička, R. Garg, M. Dietz, M. Bacak, M. Barbagallo, U. Battino, S. Cristallo, L. A. Damone, M. Diakaki, S. Heinitz, D. Macina, M. Mastromarco, F. Mingrone, A. St J. Murphy, G. Tagliente, S. Valenta, D. Vescovi, O. Aberle, V. Alcayne, S. Amaducci, J. Andrzejewski, L. Audouin, V. Bécares, V. Babiano-Suarez, F. Bečvář, G. Bellia, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, C. Domingo-Pardo, R. Dressler, A. Pavlik, A. Wallner

Abstract

The Se77(n,γ) reaction is of importance for Se77 abundance during the slow neutron capture process in massive stars. We have performed a new measurement of the Se77 radiative neutron capture cross section at the Neutron Time-of-Flight facility at CERN. Resonance capture kernels were derived up to 51 keV and cross sections up to 200 keV. Maxwellian-averaged cross sections were calculated for stellar temperatures between kT=5keV and kT=100keV, with uncertainties between 4.2% and 5.7%. Our results lead to substantial decreases of 14% and 19% in Se77 abundances produced through the slow neutron capture process in selected stellar models of 15M⊙ and 2M⊙, respectively, compared to using previous recommendation of the cross section.

Organisation(s)

Isotope Physics

External organisation(s)

University of Edinburgh, Charles University Prague, Michigan State University, Physikalisch-Technische Bundesanstalt, European Organization for Nuclear Research (CERN), Technische Universität Wien, Université Paris-Saclay, Istituto Nazionale di Fisica Nucleare (INFN), Roma, University of Hull, INAF-Osservatorio Astrofisico di Torino, Università degli Studi di Bari, National Technical University of Athens (NTUA), Paul Scherrer Institute, Johann Wolfgang Goethe-Universität Frankfurt am Main, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Università degli Studi di Catania, University of Lodz, IPHC, Universitat de València, University of Manchester, University of Zagreb, University of York, Università degli Studi di Perugia, Universidade de Santiago de Compostela (USC), Universitat Politècnica de Catalunya, Universidad de Sevilla, Australian National University

Journal

Physical Review C

Volume

107

No. of pages

9

ISSN

2469-9985

DOI

https://doi.org/10.1103/PhysRevC.107.065805

Publication date

06-2023

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucris.univie.ac.at/portal/en/publications/measurement-of-the-77se-n-cross-section-up-to-200-kev-at-the-ntof-facility-at-cern(59e9d3f0-701b-41f9-968e-cca519c622b6).html