EPJ Web of Conferences (Jan 2023)

New detection systems for an enhanced sensitivity in key stellar (n,γ) measurements

  • Lerendegui-Marco J.,
  • Babiano-Suárez V.,
  • Balibrea-Correa J.,
  • Domingo-Pardo C.,
  • Ladarescu I.,
  • Tarifeño-Saldivia A.,
  • Alcayne V.,
  • Cano-Ott D.,
  • González-Romero E.,
  • Martínez T.,
  • Mendoza E.,
  • Guerrero C.,
  • Calviño F.,
  • Casanovas A.,
  • Köster U.,
  • Chiera N. M.,
  • Dressler R.,
  • Maugeri E. A.,
  • Schumann D.,
  • Aberle O.,
  • Altieri S.,
  • Amaducci S.,
  • Andrzejewski J.,
  • Bacak M.,
  • Beltrami C.,
  • Bennett S.,
  • Bernardes A. P.,
  • Berthoumieux E.,
  • Beyer R.,
  • Boromiza M.,
  • Bosnar D.,
  • Caamaño M.,
  • Calviani M.,
  • Cerutti F.,
  • Cescutti G.,
  • Chiaveri E.,
  • Colombetti P.,
  • Colonna N.,
  • Console Camprini P.,
  • Cortés G.,
  • Cortés-Giraldo M. A.,
  • Cosentino L.,
  • Cristallo S.,
  • Dellmann S.,
  • Di Castro M.,
  • Di Maria S.,
  • Diakaki M.,
  • Dietz M.,
  • Dupont E.,
  • Durán I.,
  • Eleme Z.,
  • Fargier S.,
  • Fernández B.,
  • Fernández-Domínguez B.,
  • Finocchiaro P.,
  • Fiore S.,
  • García-Infantes F.,
  • Gawlik-Ramięga A.,
  • Gervino G.,
  • Gilardoni S.,
  • Gunsing F.,
  • Gustavino C.,
  • Heyse J.,
  • Hillman W.,
  • Jenkins D. G.,
  • Jericha E.,
  • Junghans A.,
  • Kadi Y.,
  • Kaperoni K.,
  • Kaur G.,
  • Kimura A.,
  • Knapová I.,
  • Kokkoris M.,
  • Krtička M.,
  • Kyritsis N.,
  • Lederer-Woods C.,
  • Lerner G.,
  • Manna A.,
  • Masi A.,
  • Massimi C.,
  • Mastinu P.,
  • Mastromarco M.,
  • Mazzone A.,
  • Mengoni A.,
  • Michalopoulou V.,
  • Milazzo P. M.,
  • Mucciola R.,
  • Murtas F.,
  • Musacchio-Gonzalez E.,
  • Musumarra A.,
  • Negret A.,
  • Pérez de Rada A.,
  • Pérez-Maroto P.,
  • Patronis N.,
  • Pavón-Rodríguez J. A.,
  • Pellegriti M. G.,
  • Perkowski J.,
  • Petrone C.,
  • Pirovano E.,
  • Plaza J.,
  • Pomp S.,
  • Porras I.,
  • Praena J.,
  • Quesada J. M.,
  • Reifarth R.,
  • Rochman D.,
  • Romanets Y.,
  • Rubbia C.,
  • Sánchez-Caballero A.,
  • Sabaté-Gilarte M.,
  • Schillebeeckx P.,
  • Sekhar A.,
  • Smith A. G.,
  • Sosnin N. V.,
  • Stamati M. E.,
  • Sturniolo A.,
  • Tagliente G.,
  • Tarrío D.,
  • Torres-Sánchez P.,
  • Vagena E.,
  • Valenta S.,
  • Variale V.,
  • Vaz P.,
  • Vecchio G.,
  • Vescovi D.,
  • Vlachoudis V.,
  • Vlastou R.,
  • Wallner A.,
  • Woods P. J.,
  • Wright T.,
  • Zarrella R.,
  • Žugec P.

DOI
https://doi.org/10.1051/epjconf/202327913001
Journal volume & issue
Vol. 279
p. 13001

Abstract

Read online

Neutron capture cross-section measurements are fundamental in the study of astrophysical phenomena, such as the slow neutron capture (s-) process of nucleosynthesis operating in red-giant and massive stars. However, neutron capture measurements via the time-of-flight (TOF) technique on key s-process nuclei are often challenging. Difficulties arise from the limited mass (∼mg) available and the high sample-related background in the case of the unstable s-process branching points. Measurements on neutron magic nuclei, that act as s-process bottlenecks, are affected by low (n,γ) cross sections and a dominant neutron scattering background. Overcoming these experimental challenges requires the combination of facilities with high instantaneous flux, such as n_TOFEAR2, with detection systems with an enhanced detection sensitivity and high counting rate capabilities. This contribution reviews some of the latest detector developments in detection systems for (n,γ) measurements at n_TOF, such as i-TED, an innovative detection system which exploits the Compton imaging technique to reduce the dominant neutron scattering background and s-TED, a highly segmented total energy detector intended for high flux facilities. The discussion will be illustrated with results of the first measurement of key the s-process branching-point reaction 79Se(n,γ).