Quadrupole Deformation of the Self-Conjugate Nucleus 72Kr
Abstract
We report on the first determination of the absolute B(E2;0+1→2+1) excitation strength in the N=Z nucleus 72Kr. 72Kr is the heaviest N=Z nucleus for which this quantity has been measured and provides a benchmark in a region of the nuclear chart dominated by rapidly changing deformations and shapes mediated by the interplay of strongly oblate and prolate-driving orbitals. The deduced quadrupole deformation strength is in agreement with a variety of self-consistent models that predict an oblate shape for the ground state of 72Kr. Large-scale shell-model Monte Carlo calculations reproduce the experimental B(E2) value and link the result to the occupation of the deformation-driving g9/2 orbit.
- Publication:
-
Physical Review Letters
- Pub Date:
- July 2005
- DOI:
- 10.1103/PhysRevLett.95.022502
- Bibcode:
- 2005PhRvL..95b2502G
- Keywords:
-
- 21.10.Ft;
- 25.70.De;
- 25.70.Mn;
- 27.50.+e;
- Charge distribution;
- Coulomb excitation;
- Projectile and target fragmentation;
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- =A<
- =89