Level structure above the 17(+) isomeric state in Tm-152(69)83

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Singh , B S N , Cullen , D M , Taylor , M J , Srivastava , P C , Van Isacker , P , Beeke , O , Dodson , B , Scholey , C , O'Donell , D , Jakobson , U , Grahn , T , Greenlees , P T , Jones , P M , Julin , R , Khan , S , Leino , M , Leppänen , A-P , Eeckhaudt , S , Mäntyniemi , K , Pakarinen , J , Peura , P , Rahkila , P , Saren , J , Sorri , J , Uusitalo , J & Venhart , M 2018 , ' Level structure above the 17(+) isomeric state in Tm-152(69)83 ' , Physical Review C , vol. 98 , no. 2 , 024319 . https://doi.org/10.1103/PhysRevC.98.024319

Title: Level structure above the 17(+) isomeric state in Tm-152(69)83
Author: Singh, B. S. Nara; Cullen, D. M.; Taylor, M. J.; Srivastava, P. C.; Van Isacker, P.; Beeke, O.; Dodson, B.; Scholey, C.; O'Donell, D.; Jakobson, U.; Grahn, T.; Greenlees, P. T.; Jones, P. M.; Julin, R.; Khan, S.; Leino, M.; Leppänen, A-P.; Eeckhaudt, S.; Mäntyniemi, K.; Pakarinen, J.; Peura, P.; Rahkila, P.; Saren, J.; Sorri, J.; Uusitalo, J.; Venhart, M.
Contributor organization: Department of Chemistry
Helsinki Institute of Physics
Date: 2018-08-28
Language: eng
Number of pages: 10
Belongs to series: Physical Review C
ISSN: 2469-9985
DOI: https://doi.org/10.1103/PhysRevC.98.024319
URI: http://hdl.handle.net/10138/243773
Abstract: Excited states above the 17(+) isomeric state in the proton-rich nucleus Tm-152 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 gamma decays from the levels in Tm-152. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the pi 0h(11)(/2) orbital and one neutron in the nu 1 f(7/2) 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.
114 Physical sciences
Peer reviewed: Yes
Rights: cc_by
Usage restriction: openAccess
Self-archived version: publishedVersion

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