Beta-decay half-lives of new neutron-rich isotopes of Re, Os and Ir approaching the r-process path near N = 126

Abstract : Heavy neutron-rich nuclei close to N = 126 were produced by fragmentation of a 1A GeV 208Pb beam at the FRS at GSI. The β-decay half-lives of 7 nuclides have been determined using a novel numerical analysis method. The half-lives of 202,199Ir, 200,199Os and 196Re are reported for the first time. The comparison of the data with model calculations provides indications on the importance of first-forbidden transitions on the β-decay of nuclei around N = 126 and Z < 82.
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Submitted on : Monday, September 15, 2014 - 9:41:43 AM
Last modification on : Tuesday, February 19, 2019 - 9:58:16 AM

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T. Kurtukian Nieto, J. Benlliure, K.-H. Schmidt, L. Audouin, F. Becker, et al.. Beta-decay half-lives of new neutron-rich isotopes of Re, Os and Ir approaching the r-process path near N = 126. European Physical Journal A, EDP Sciences, 2014, 50, pp.135-142. ⟨10.1140/epja/i2014-14135-5⟩. ⟨in2p3-01063903⟩

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