α-decay spectra of odd nuclei using the effective Skyrme interaction

D. E. Ward, B. G. Carlsson, and S. Åberg
Phys. Rev. C 92, 014314 – Published 20 July 2015

Abstract

Background: For nuclei heavier than 208Pbα decay is a dominating decay mode. α decay of odd nuclei can give spectroscopic information because different states in the daughter nucleus can be populated in the decay.

Purpose: To explore and test microscopic descriptions of α decay of odd nuclei based on self-consistent models with effective nuclear interactions. To predict the hindrance of α decay of odd-A superheavy nuclei.

Methods: We apply the method of our previous work [D. E. Ward, B. G. Carlsson, and S. Åberg, Phys. Rev. C 88, 064316 (2013)] to the case of odd-A near-spherical nuclei. The Skyrme effective interaction SLy4 is used. Starting from the obtained Hartree-Fock-Bogoliubov vacuum and quasiparticle excitations, the α-particle formation amplitude is calculated giving the decay rates and hindrance of different α-decay channels.

Result: The calculated relative decay rates show good agreement with available data. The hindrance of decay channels where the odd nucleon changes orbital is reasonably described by the microscopic calculation. Several hindered ground-state decays of superheavy nuclei are predicted, implying possible αγ coincidences.

Conclusions: The approach offers a practical method of making quantitative predictions for the relative hindrance of different α-decay channels.

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  • Received 19 May 2015

DOI:https://doi.org/10.1103/PhysRevC.92.014314

©2015 American Physical Society

Authors & Affiliations

D. E. Ward*, B. G. Carlsson, and S. Åberg

  • Mathematical Physics, LTH, Lund University, PO Box 118, S-22100 Lund, Sweden

  • *daniel.ward@matfys.lth.se

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Vol. 92, Iss. 1 — July 2015

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