The 154Gd neutron capture cross section measured at the n_TOF facility and its astrophysical implications

M. Mastromarco; A. Mazzone; C. Massimi; S. Cristallo; N. Colonna; O. Aberle; V. Alcayne; S. Amaducci; J. Andrzejewski; L. Audouin; V Babiano-Suarez; M. Bacak; M. Barbagallo; S. Bennett; E. Berthoumieux; D. Bosnar; A. S. Brown; M. Busso; M. Caamaño; L. Caballero; M. Calviani; F. Calviño; D Cano-Ott; A. Casanovas; F. Cerutti; E. Chiaveri; G. P. Cortés; M. A. Cortés-Giraldo; L. Cosentino; 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-Domíngez; A. Ferrari; I. Ferro-Gonçalves; P. Finocchiaro; V. Furman; R. Garg; A. Gawlik; S. Gilardoni; K. Göbel; E. González-Romero; C. Guerrero; F. Gunsing; S. Heinitz; J. Heyse; D. G. Jenkins; E. Jericha; U. Jiri; A. Junghans; Y. Kadi; F. Käppeler; A. Kimura; I. Knapová; M. Kokkoris; Y. Kopatch; M. Krtička; D. Kurtulgil; I. Ladarescu; C Lederer-Woods; J Lerendegui-Marco; S.-J. Lonsdale; D. Macina; A. Manna; T. Martínez; A. Masi; P. F. Mastinu; E. Maugeri; E. Mendoza; A. Mengoni; V. Michalopoulou; P. M. Milazzo; M. A. Millán-Callado; F. Mingrone; J Moreno-Soto; A. Musumarra; A. Negret; F. Ogállar; A. Oprea; N. Patronis; A. Pavlik; J. Perkowski; C. Petrone; L. Piersanti; E. Pirovano; I. Porras; J. Praena; J. M. Quesada; D. Ramos Doval; R. Reifarth; D. Rochman; C. Rubbia; M. Sabaté-Gilarte; A. Saxena; P. Schillebeeckx; D. Schumann; A. Sekhar; A. G. Smith; N. Sosnin; P. Sprung; A. Stamatopoulos; G. Tagliente; J. L. Tain; A. E. Tarifeño-Saldivia; L Tassan-Got; B. Thomas; P. Torres-Sánchez; A. Tsinganis; S. Urlass; S. Valenta; G. Vannini; V. Variale; P. Vaz; A. Ventura; D. Vescovi; V. Vlachoudis; R. Vlastou; A. Wallner; P. J. Woods; T. J. Wright; P. Žugec

doi:10.1051/epjconf/202023907003

All issues

Volume 239 (2020)

EPJ Web Conf., 239 (2020) 07003

Abstract

Open Access

Issue		EPJ Web Conf. Volume 239, 2020 ND 2019: International Conference on Nuclear Data for Science and Technology


Article Number		07003
Number of page(s)		5
Section		Nuclear Data for Astrophysics and Cosmology
DOI		https://doi.org/10.1051/epjconf/202023907003
Published online		30 September 2020

EPJ Web of Conferences 239, 07003 (2020)
https://doi.org/10.1051/epjconf/202023907003

The ¹⁵⁴Gd neutron capture cross section measured at the n_TOF facility and its astrophysical implications

M. Mastromarco¹^,2^*, A. Mazzone³^,4, C. Massimi⁵^,6, S. Cristallo⁷^,8, N. Colonna³, O. Aberle¹, V. Alcayne⁹, S. Amaducci¹⁰^,11, J. Andrzejewski¹², L. Audouin¹³, V Babiano-Suarez¹⁴, M. Bacak¹^,15^,16, M. Barbagallo¹^,3, S. Bennett², E. Berthoumieux¹⁶, D. Bosnar¹⁷, A. S. Brown¹⁸, M. Busso⁷^,19, M. Caamaño²⁰, L. Caballero¹⁴, M. Calviani¹, F. Calviño²¹, D Cano-Ott⁹, A. Casanovas²¹, F. Cerutti¹, E. Chiaveri²^,22^,1, G. P. Cortés²¹, M. A. Cortés-Giraldo²², L. Cosentino¹⁰, L. A. Damone³^,23, P. J. Davies², M. Diakaki²⁴, M. Dietz²⁵, C Domingo-Pardo¹⁴, R. Dressler²⁶, Q. Ducasse²⁷, E. Dupont¹⁶, I. Durán²⁰, Z. Eleme²⁸, B. Fernández-Domíngez²⁰, A. Ferrari¹, I. Ferro-Gonçalves²⁹, P. Finocchiaro¹⁰, V. Furman³⁰, R. Garg²⁵, A. Gawlik¹², S. Gilardoni¹, K. Göbel³¹, E. González-Romero⁹, C. Guerrero²², F. Gunsing¹⁶, S. Heinitz²⁶, J. Heyse³², D. G. Jenkins¹⁸, E. Jericha¹⁵, U. Jiri²⁶, A. Junghans³³, Y. Kadi¹, F. Käppeler³⁴, A. Kimura³⁵, I. Knapová³⁶, M. Kokkoris²⁴, Y. Kopatch³⁰, M. Krtička³⁶, D. Kurtulgil³¹, I. Ladarescu¹⁴, C Lederer-Woods²⁵, J Lerendegui-Marco²², S.-J. Lonsdale²⁵, D. Macina¹, A. Manna⁵^,6, T. Martínez⁹, A. Masi¹, P. F. Mastinu³⁷, E. Maugeri²⁶, E. Mendoza⁹, A. Mengoni³⁸^,5, V. Michalopoulou¹^,24, P. M. Milazzo³⁹, M. A. Millán-Callado²², F. Mingrone¹, J Moreno-Soto¹⁶, A. Musumarra¹⁰^,11, A. Negret⁴⁰, F. Ogállar⁴¹, A. Oprea⁴⁰, N. Patronis²⁸, A. Pavlik⁴², J. Perkowski¹², C. Petrone⁴⁰, L. Piersanti⁷^,8, E. Pirovano²⁷, I. Porras⁴¹, J. Praena⁴¹, J. M. Quesada²², D. Ramos Doval¹³, R. Reifarth³¹, D. Rochman²⁶, C. Rubbia¹, M. Sabaté-Gilarte²²^,1, A. Saxena⁴³, P. Schillebeeckx³², D. Schumann²⁶, A. Sekhar², A. G. Smith², N. Sosnin², P. Sprung²⁶, A. Stamatopoulos²⁴, G. Tagliente³, J. L. Tain¹⁴, A. E. Tarifeño-Saldivia²¹, L Tassan-Got¹^,24^,13, B. Thomas³¹, P. Torres-Sánchez⁴¹, A. Tsinganis¹, S. Urlass¹^,33, S. Valenta³⁶, G. Vannini⁵^,6, V. Variale³, P. Vaz²⁹, A. Ventura⁵, D. Vescovi⁷^,44, V. Vlachoudis¹, R. Vlastou²⁴, A. Wallner⁴⁵, P. J. Woods²⁵, T. J. Wright² and P. Žugec¹⁷

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

^* e-mail: mario.mastromarco@cern.ch
¹ The possible contribution from the p-process is currently matter of debate.

Published online: 30 September 2020

Abstract

The (n, γ) cross sections of the gadolinium isotopes play an important role in the study of the stellar nucleosynthesis. In particular, among the isotopes heavier than Fe, ¹⁵⁴Gd together with ¹⁵²Gd have the peculiarity to be mainly produced by the slow capture process, the so-called s-process, since they are shielded against the β-decay chains from the r-process region by their stable samarium isobars. Such a quasi pure s-process origin makes them crucial for testing the robustness of stellar models in galactic chemical evolution (GCE). According to recent models, the ¹⁵⁴Gd and ¹⁵²Gd abundances are expected to be 15-20% lower than the reference un-branched s-process ¹⁵⁰Sm isotope. The close correlation between stellar abundances and neutron capture cross sections prompted for an accurate measurement of ¹⁵⁴Gd cross section in order to reduce the uncertainty attributable to nuclear physics input and eventually rule out one of the possible causes of present discrepancies between observation and model predictions. To this end, the neutron capture cross section of ¹⁵⁴Gd was measured in a wide neutron energy range (from thermal up to some keV) with high resolution in the first experimental area of the neutron time-of-flight facility n_TOF (EAR1) at CERN. In this contribution, after a brief description of the motivation and of the experimental setup used in the measurement, the preliminary results of the ¹⁵⁴Gd neutron capture reaction as well as their astrophysical implications are presented.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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