Structure of 0+ excitations in the mass A ≈100 region: 02+ bands in 98Sr and 100Zr
Abstract
02+ bands in 98Sr and 100Zr, populated in spontaneous fission of 248Cm and 252Cf, have been studied using the Eurogam2 and Gammasphere arrays. Phenomenological classification of excited 0+ levels in even-even nuclei of the A ≈100 region into four categories is presented and an interpretation for each category is proposed. Highly deformed 01+ ground states and low-energy 02+ levels in both nuclei are probably due to the 2p-2h excitation of two neutrons from the 9 /2+[404 ] extruder to the low-Ω prolate and the 11 /2-[505 ] oblate orbitals originating from the h11 /2 shell, respectively. Candidates for 0+, β vibrational states in A ≈100 region are suggested at N >60 .
- Publication:
-
Physical Review C
- Pub Date:
- June 2019
- DOI:
- 10.1103/PhysRevC.99.064325
- Bibcode:
- 2019PhRvC..99f4325U