6533b823fe1ef96bd127e148
RESEARCH PRODUCT
New shape isomer in the self-conjugate nucleus $^{72}$Kr
E. BouchezI. MateaW. KortenF. BeckerB. BlankC. BorceaA. ButaA. EmsallemG. De FranceJ. GeneveyF. HannachiK. HauschildA. HürstelY. Le CozM. LewitowiczR. LucasF. NegoitaF. De Oliveira SantosD. PantelicaJ. PinstonP. RahkilaM. RejmundM. StanoiuCh. Theisensubject
Physics010308 nuclear & particles physicsGeneral Physics and AstronomyProlate spheroid[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]01 natural sciencesmedicine.anatomical_structurenuclear physicsExcited stateMetastability0103 physical sciencesPhysics::Atomic and Molecular ClustersmedicineAtomic physicsNuclear Experimentydinfysiikka010306 general physicsSpectroscopyGround stateNucleusConjugatedescription
A new isomeric ${0}^{+}$ state was identified as the first excited state in the self-conjugate ($N=Z$) nucleus $^{\mathrm{72}}\mathrm{K}\mathrm{r}$. By combining for the first time conversion-electron and gamma-ray spectroscopy with the production of metastable states in high-energy fragmentation, the electric-monopole decay of the new isomer to the ground state was established. The new ${0}^{+}$ state is understood as the band head of the known prolate rotational structure, which strongly supports the interpretation that $^{\mathrm{72}}\mathrm{K}\mathrm{r}$ is one of the rare nuclei having an oblate-deformed ground state. This observation gives in fact the first evidence for a shape isomer in a $N=Z$ nucleus.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-01-01 |