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: University of Helsinki, Department of Chemistry
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
Date: 2018-08-28
Language: eng
Number of pages: 10
Belongs to series: Physical Review C
ISSN: 2469-9985
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.
Subject: TOTAL DATA READOUT
SHELL CLOSURE
YRAST STATES
NUCLEI
PROTON
ER-150(68)82
114 Physical sciences
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