6533b82efe1ef96bd1292b0b
RESEARCH PRODUCT
Level structure above the 17+ isomeric state in 152 69 Tm83
B. S. Nara SinghD. M. CullenM. J. TaylorP. C. SrivastavaP. Van IsackerO. BeekeB. DodsonCatherine ScholeyD. O’donellUlrika JakobssonTuomas GrahnPaul GreenleesPeter JonesRauno JulinS. KhanMatti LeinoAri-pekka LeppänenSarah EeckhaudtK. MäntyniemiJanne PakarinenPauli PeuraPanu RahkilaJan SarénJuha SorriJuha UusitaloM. Venhartsubject
lifetimes and widthselectromagnetic transitionsNuclear Theorynuclear spin and parityshell modelnuclear forcesNuclear Experimentisomer decaysydinfysiikkadescription
Excited states above the 17+ isomeric state in the proton-rich nucleus 152Tm were established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π0h11/2 orbital and one neutron in the ν1f7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J = 21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17+ level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-01-01 |