Measurement of the ¹⁴⁰Ce(n,γ) Cross Section at n_TOF and Its Astrophysical Implications for the Chemical Evolution of the Universe

Autor(en)

, S. Amaducci, N. Colonna, L. Cosentino, S. Cristallo, P. Finocchiaro, M. Krtička, C. Massimi, M. Mastromarco, A. Mazzone, E. A. Maugeri, A. Mengoni, I. U. Roederer, O. Straniero, S. Valenta, D. Vescovi, O. Aberle, V. Alcayne, J. Andrzejewski, L. Audouin, V. Babiano-Suarez, M. Bacak, M. Barbagallo, S. Bennett, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Busso, M. Caamaño, L. Caballero-Ontanaya, F. Calviño, M. Calviani, D. Cano-Ott, A. Casanovas, F. Cerutti, E. Chiaveri, G. Cortés, M. A. Cortés-Giraldo, L. A. Damone, P. J. Davies, M. Diakaki, M. Dietz, C. Domingo-Pardo, R. Dressler, Q. Ducasse, E. Dupont, I. Durán, Z. Eleme, B. Fernández-Domínguez, A. Pavlik

Abstrakt

Ce140(n,γ) is a key reaction for slow neutron-capture (s-process) nucleosynthesis due to being a bottleneck in the reaction flow. For this reason, it was measured with high accuracy (uncertainty ≈5%) at the n_TOF facility, with an unprecedented combination of a high purity sample and low neutron-sensitivity detectors. The measured Maxwellian averaged cross section is up to 40% higher than previously accepted values. Stellar model calculations indicate a reduction around 20% of the s-process contribution to the Galactic cerium abundance and smaller sizeable differences for most of the heavier elements. No variations are found in the nucleosynthesis from massive stars.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Istituto Nazionale di Fisica Nucleare (INFN), Roma, INAF-Osservatorio Astrofisico di Torino, Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Charles University Prague, Università degli Studi di Catania, Università di Bologna, European Organization for Nuclear Research (CERN), Consiglio Nazionale delle Ricerche, Paul Scherrer Institute, Agenzia nazionale per le nuove tecnologie, l’energia e lo sviluppo economico sostenibile, North Carolina State University, University of Michigan, Joint Institute of Nuclear Astrophysics - Center for the Evolution of the Elements, Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Napoli, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, University of Lodz, Institut pluridisciplinaire Hubert Curien, Universitat de València, Technische Universität Wien, Université Paris-Saclay, 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, Università degli Studi di Bari, National Technical University of Athens (NTUA), University of Edinburgh, Physikalisch-Technische Bundesanstalt, University of Ioannina

Journal

Physical Review Letters

Band

132

Anzahl der Seiten

8

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.132.122701

Publikationsdatum

03-2024

Peer-reviewed

Ja

ÖFOS 2012

103014 Kernphysik

ASJC Scopus Sachgebiete

Physics and Astronomy(all)

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/measurement-of-the-140cen-cross-section-at-ntof-and-its-astrophysical-implications-for-the-chemical-evolution-of-the-universe(02d370d4-9212-41c0-930e-193509b9765e).html