Neutron-hole strength in N =81 nuclei
Abstract
A systematic study of neutron-hole strength in the N =81 nuclei 137Ba, 139Ce, 141Nd, and 143Sm is reported. The single-neutron removal reactions (p ,d ) and (3He,α ) were measured at energies of 23 and 34 MeV, respectively. Spectroscopic factors were extracted from measured cross sections through a distorted-wave Born approximation analysis and centroids of single-particle strength have been established. The change in these centroid energies as a function of proton number have been compared to calculations of the monopole shift for the s1 /2 and h11 /2 orbitals, where the majority of the strength has been observed. Significant fragmentation of strength was observed for the d and g7 /2 orbitals, particularly for the latter orbital which is deeply bound, with summed strengths that indicate a significant amount lies outside of the measured excitation energy range.
- Publication:
-
Physical Review C
- Pub Date:
- March 2020
- DOI:
- 10.1103/PhysRevC.101.034309
- arXiv:
- arXiv:2003.09299
- Bibcode:
- 2020PhRvC.101c4309H
- Keywords:
-
- Nuclear Experiment
- E-Print:
- doi:10.1103/PhysRevC.101.034309