Recent progress in measuring β half-lives of nuclei approaching the r-process waiting point A = 195

Abstract : Heavy neutron-rich nuclei close to N=126 were produced by fragmentation of a 1 A GeV 208Pb beam at the FRS at GSI. The β-decay half-lives of 8 nuclides have been determined using a novel numerical analysis method. The comparison of the data with model calculations provides indications on the importance of first-forbidden transitions around A=195. The measured data indicate that the matter flow in the r-process to heavier fissioning nuclei may be faster than previously expected.
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Submitted on : Friday, July 31, 2009 - 2:46:14 PM
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T. Kurtukian Nieto, J. Benlliure, K.-H. Schmidt, L. Audouin, F. Becker, et al.. Recent progress in measuring β half-lives of nuclei approaching the r-process waiting point A = 195. The Eighteenth Particles and Nuclei International Conference – PANIC08, Nov 2008, Eilat, Israel. pp.587c-589c, ⟨10.1016/j.nuclphysa.2009.05.129⟩. ⟨in2p3-00408690⟩

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