Shape coexistence in {sup 72}Se investigated following the {beta}-decay of {sup 72}Br.
- Physics
The structure of {sup 72}Se was investigated following the {epsilon}/{beta}{sup +} decay of {sup 72}Br produced in the {sup 58}Ni({sup 16}O, pn) reaction at 50 MeV. Using a beam chopping system, off-beam {gamma}-ray decay data was collected with an array of clover Ge detectors. {gamma}-{gamma} coincidence measurements provided a significant modification of the prior level scheme, and {gamma}-{gamma} angular correlation measurements allowed spin determinations and multipole mixing ratio extraction. The new information on the non-yrast states was combined with previous in-beam data to investigate the issue of shape coexistence by comparing to various configuration mixing approaches. Clear evidence for shape coexistence is found, with a ground state of modest, or slightly oblate, deformation and a well-deformed prolate shape that would lie at an unperturbed excitation of 875 keV. The shape mixing is near complete at low spin.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- SC
- DOE Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1014823
- Report Number(s):
- ANL/PHY/JA-68272
- Journal Information:
- Phys. Rev. C, Journal Name: Phys. Rev. C Journal Issue: 2 ; Feb. 18, 2011 Vol. 83; ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- ENGLISH
Similar Records
Shape coexistence and high spin states in {sup 52}Cr
Shape coexistence in transitional nuclei in the A @ 120 mass region