High-spin states in the semimagic nucleus 89Y and neutron-core excitations in the N =50 isotones
Abstract
The semimagic nucleus 89Y 89 has been investigated using the 82Se(11>B,4 n ) reaction at beam energies of 48 and 52 MeV. More than 24 new transitions have been identified, leading to a considerable extension of the level structures of 89Y. The experimental results are compared with the large-basis shell model calculations. They show that cross-shell neutron excitations play a pivotal role in high-spin level structures of 89Y. The systematic features of neutron-core excitations in the N =50 isotones are also discussed.
- Publication:
-
Physical Review C
- Pub Date:
- July 2016
- DOI:
- 10.1103/PhysRevC.94.014315
- Bibcode:
- 2016PhRvC..94a4315L