One-Proton Halo in 31Cl with Relativistic Mean-FieldTheory

  • We investigate proton-rich isotopes 31,32Cl using the nonlinear relativistic mean-field model. It is shown that this model can reproduce the properties of these nuclei well. A long tail appears in the calculated proton density distribution of 31Cl. The results of relativistic density-dependent Hartree theory show a similar trend of tail density distribution. It is strongly suggested that there is a proton halo in 31Cl and it is indicated that there may exist proton skin in 31Cl. The relation between the proton halo in 1Cl and the new proton magic number is discussed.
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