First Measurement of Several β -Delayed Neutron Emitting Isotopes beyond N=126

Caballero-Folch, R. and Domingo-Pardo, C. and Agramunt, J. and Algora, Alejandro and Ameil, F. (2016) First Measurement of Several β -Delayed Neutron Emitting Isotopes beyond N=126. PHYSICAL REVIEW LETTERS, 117 (1). 012501. ISSN 0031-9007

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Abstract

The β-delayed neutron emission probabilities of neutron rich Hg and Tl nuclei have been measured together with β-decay half-lives for 20 isotopes of Au, Hg, Tl, Pb, and Bi in the mass region N126. These are the heaviest species where neutron emission has been observed so far. These measurements provide key information to evaluate the performance of nuclear microscopic and phenomenological models in reproducing the high-energy part of the β-decay strength distribution. This provides important constraints on global theoretical models currently used in r-process nucleosynthesis. © 2016 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the http://creativecommons.org/licenses/by/3.0/Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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