β decay of deformed r-process nuclei near A=80 and A=160, including odd-A and odd-odd nuclei, with the Skyrme finite-amplitude method

T. Shafer, J. Engel, C. Fröhlich, G. C. McLaughlin, M. Mumpower, and R. Surman
Phys. Rev. C 94, 055802 – Published 7 November 2016

Abstract

After identifying the nuclei in the A80 and A160 regions for which β-decay rates have the greatest effect on weak and main r-process abundance patterns, we apply the finite-amplitude method (FAM) with Skyrme energy-density functionals (EDFs) to calculate β-decay half-lives of those nuclei in the quasiparticle random-phase approximation (QRPA). We use the equal filling approximation to extend our implementation of the charge-changing FAM, which incorporates pairing correlations and allows axially symmetric deformation, to odd-A and odd-odd nuclei. Repeated calculations with A160 nuclei and multiple EDFs show a spread of 1.9–3.3 in β-decay half-lives, with differences in calculated Q values playing an important role. We compare our results with those of previous work and investigate their implications for r-process simulations.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
10 More
  • Received 22 June 2016
  • Revised 3 September 2016

DOI:https://doi.org/10.1103/PhysRevC.94.055802

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

T. Shafer* and J. Engel

  • Department of Physics and Astronomy, CB 3255, University of North Carolina, Chapel Hill, North Carolina 27599-3255

C. Fröhlich and G. C. McLaughlin

  • Department of Physics, North Carolina State University, Box 8202, Raleigh, North Carolina 27695

M. Mumpower

  • Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 and Theory Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87544

R. Surman

  • Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556

  • *tom@tshafer.com
  • engelj@physics.unc.edu

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 94, Iss. 5 — November 2016

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×