Speaker
Dr
Jianguo Li
(PKU)
Description
Based on the realistic nuclear force of the high-precision CD-Bonn potential, we have performed comprehensive calculations for neutron-rich calcium isotopes using the Gamow shell model method (CGSM) which includes resonance and continuum. The GSM calculations well produce the binding energies and single-neutron separation energies of the calcium isotopes, predicting that $^{57}$Ca is the last bound odd isotope and even-even $^{70}$Ca is the dripline nucleus in calcium chain. Resonant states are predicted, which provides useful information for experiments on particle unstability in neutron-rich calcium isotopes. The evolutions of the shell structure around the neutron numbers of *N* = 32, 34 and 40 in the calcium chain are understood via the calculations of effective single-particle energies and the energies of the first $2^+$ states, as well as two-neutron separation energies. Our calculations support the sub-shell closures in $^{52}$Ca (*N* = 32) and $^{54}$Ca (*N* = 34) and pedict that the *N* = 40 sub-shell closure disappears in calcium chain. The possible shell closure at N=50 and the dripline position at $^{70}$Ca are predicted. Effects from the continuum coupling are discussed.
| Abstract Type | Talk |
|---|
Primary authors
Prof.
Furong Xu
(Peking University)
Dr
Jianguo Li
(PKU)
Co-authors
Dr
Baishan Hu
(Peking University)
Prof.
Nicolas Michel
(Institute of Modern Physics, Lanzhou)
