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

作者：Wan, Niu; Xu, Chang^*; Ren, Zhongzhou

来源：PHYSICAL REVIEW C, 2016, 94(4): 044322.

DOI：10.1103/PhysRevC.94.044322

• NEUTRON-STARS
• FOLDING MODEL
• STATE
• SCATTERING
• NUCLEI
• EQUATION
• POTENTIALS
• PHYSICS
• MATTER

Background: Recently, the cluster radioactivity of heavy nuclei decaying to Pb-208 was successfully used to constrain the density slope of the symmetry energy L(rho(0)) at saturation density rho(0). @@@ Purpose: By using well-measured experimental decay energy and half-life, proton radioactivity is proposed to further constrain L(rho(0)) in this work. @@@ Method: From the Hugenholtz-Van Hove theorem, L(rho(0)) 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(rho(0)) = 51.8 +/- 7.2 MeV.

• 出版日期2016-10-28
• 单位南京大学