First access to $\beta$ half-lives approaching the r-process path near N=126

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 beta-decay half-lives of 8 nuclides have been determined. The comparison of the data with model calculations including an approach based on the self-consistent ground-state description and continuum QRPA considering the Gamow-Teller and first-forbidden decays provide a first indication 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 is faster than previously expected.
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Submitted on : Friday, November 2, 2007 - 8:32:04 AM
Last modification on : Tuesday, July 24, 2018 - 10:24:01 AM

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  • HAL Id : in2p3-00184813, version 1
  • ARXIV : 0711.0101

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T. Kurtukian Nieto, J. Benlliure, L. Audouin, F. Becker, B. Blank, et al.. First access to $\beta$ half-lives approaching the r-process path near N=126. International Conference on Particles and Nuclei, Nov 2008, Eilat, Israel. ⟨in2p3-00184813⟩

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