Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-02-09
Phys.Rev. C65 (2002) 044301
Physics
Nuclear Physics
Nuclear Theory
18 pages (revtex), 8 ps figures, to appear in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.65.044301
We have investigated the evolution of the shell structure of nuclei in going from the r-process path to the neutron drip line within the framework of the Relativistic Hartree-Bogoliubov (RHB) theory. By introducing the quartic self-coupling of $\omega$ meson in the RHB theory in addition to the non-linear scalar coupling of $\sigma$ meson, we reproduce the available data on the shell effects about the waiting-point nucleus $^{80}$Zn. With this approach, it is shown that the shell effects at N=82 in the inaccessible region of the r-process path become milder as compared to the Lagrangian with the scalar self-coupling only. However, the shell effects remain stronger as compared to the quenching exhibited by the HFB+SkP approach. It is also shown that in reaching out to the extreme point at the neutron drip line, a terminal situation arises where the shell structure at the magic number is washed out significantly.
Farhan A. R.
Sharma Malti
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