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Neutron capture measurement at the n TOF facility of the 204Tl and 205Tl s-process branching points

Casanovas, A.; Tarifeo-Saldivia, A. E.; Domingo-Pardo, C.; Calvio, F.; Maugeri, E.; Guerrero, C.; Lerendegui-Marco, J.; Dressler, R.; Heinitz, S.; Schumann, D.; Tain, J. L.; Quesada, J. M.; Aberle, O.; Alcayne, V.; Amaducci, S.; Andrzejewski, J.; Audouin, L.; Babiano-Suarez, V.; Bacak, M.; Balibrea, J.; ... mehr

Abstract:
Neutron capture cross sections are one of the fundamental nuclear data in the study of the s (slow) process of nucleosynthesis. More interestingly, the competition between the capture and the decay rates in some unstable nuclei determines the local isotopic abundance pattern. Since decay rates are often sensible to temperature and electron density, the study of the nuclear properties of these nuclei can provide valuable constraints to the physical magnitudes of the nucleosynthesis stellar environment. Here we report on the capture cross section measurement of two thallium isotopes, $^{204}$Tl and $^{205}$Tl performed by the time-of-flight technique at the n TOF facility at CERN. At some particular stellar s-process environments, the decay of both nuclei is strongly enhanced, and determines decisively the abundance of two s-only isotopes of lead, $^{204}$Pb and $^{205}$Pb. The latter, as a long-lived radioactive nucleus, has potential use as a chronometer of the last s-process events that contributed to final solar isotopic abundances.

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Verlagsausgabe §
DOI: 10.5445/IR/1000127032
Veröffentlicht am 27.12.2020
Originalveröffentlichung
DOI: 10.1088/1742-6596/1668/1/012005
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Kernphysik (IKP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
KITopen-ID: 1000127032
HGF-Programm 51.03.04 (POF III, LK 01) Kosmische Strahlung Technologien
Erschienen in Journal of physics / Conference series
Verlag IOP Publishing
Band 1668
Heft 1
Seiten Art. Nr.: 012005
Bemerkung zur Veröffentlichung 9th Nuclear Physics in Astrophysics, NPA 2019; Schloss WaldthausenFrankfurt; Germany; 15 September 2019 through 20 September 2019
Nachgewiesen in Scopus
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