Neutron-rich isotopes around lead, beyond N=126, have been studied exploiting the fragmentation of an uranium primary beam at the FRS-RISING setup at GSI. For the first time β-decay half-lives of View the MathML source and View the MathML source isotopes have been derived. The half-lives have been extracted using a numerical simulation developed for experiments in high-background conditions. Comparison with state of the art models used in r-process calculations is given, showing a systematic underestimation of the experimental values, at variance from close-lying nuclei.

First measurement of beta decay half-lives in neutron-rich Tl and Bi isotopes

GOTTARDO, ANDREA;LUNARDI, SANTO;MENGONI, DANIELE;RECCHIA, FRANCESCO;
2012

Abstract

Neutron-rich isotopes around lead, beyond N=126, have been studied exploiting the fragmentation of an uranium primary beam at the FRS-RISING setup at GSI. For the first time β-decay half-lives of View the MathML source and View the MathML source isotopes have been derived. The half-lives have been extracted using a numerical simulation developed for experiments in high-background conditions. Comparison with state of the art models used in r-process calculations is given, showing a systematic underestimation of the experimental values, at variance from close-lying nuclei.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2572570
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