Density slope of the symmetry energy L(ρ0) constrained by proton radioactivity

Niu Wan, Chang Xu, and Zhongzhou Ren
Phys. Rev. C 94, 044322 – Published 28 October 2016

Abstract

Background: Recently, the cluster radioactivity of heavy nuclei decaying to Pb208 was successfully used to constrain the density slope of the symmetry energy L(ρ0) at saturation density ρ0.

Purpose: By using well-measured experimental decay energy and half-life, proton radioactivity is proposed to further constrain L(ρ0) in this work.

Method: From the Hugenholtz–Van Hove theorem, L(ρ0) is found to be directly related to the magnitude of the symmetry potential, which can be extracted from the proton radioactivity within the density-dependent cluster model.

Results: By investigating the radioactivity of proton emitters with large isospin asymmetry, the value of the density slope is found to be L(ρ0)=51.8±7.2 MeV.

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  • Received 7 July 2016
  • Revised 13 September 2016

DOI:https://doi.org/10.1103/PhysRevC.94.044322

©2016 American Physical Society

Physics Subject Headings (PhySH)

Nuclear Physics

Authors & Affiliations

Niu Wan1, Chang Xu1,*, and Zhongzhou Ren1,2

  • 1Department of Physics and Key Laboratory of Modern Acoustics, Nanjing University, Nanjing 210093, China
  • 2Center of Theoretical Nuclear Physics, National Laboratory of Heavy-Ion Accelerator, Lanzhou 730000, China

  • *cxu@nju.edu.cn

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Vol. 94, Iss. 4 — October 2016

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