Isomer Studies for Nuclei near the Proton Drip Line in the Mass 130-160 Region

Journal Article · Fri Nov 30 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2827270· OSTI ID:21039475

Cullen, D M; Mason, P J. R.; Khan, S; Kishada, A M; Varley, B J ^[1]; Rigby, S V ^[1]; Scholey, C; Greenlees, P; Rahkila, P; Jones, P M; Julin, R; Juutinen, S; Leino, M; Leppaenen, A P; Nyman, M; Uusitalo, J ^[2]; Grahn, T ^[2]; Nieminen, P; Pakarinen, J ^[2]

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1. School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)
2. Department of Physics, University of Jyvaeskylae, Jyvaeskylae, FIN-40014 (Finland)

This report details the status of an experimental research programme which has studied isomeric states in the mass 130-160 region of the nuclear chart. Several new isomers have been established and characterised near the proton drip line using a recoil isomer tagging technique at the University of Jyvaeskylae, Finland. The latest experiments have been performed with a modified setup where the standard GREAT focal-plane double-sided silicon-strip detector was changed to a dual multi-wire proportional-counter arrangement. This new setup has improved capability for short-lived isomer studies where high focal-plane rates can be tolerated. The results of key recent experiments for nuclei situated above ({sup 153}Yb,{sup 152}Tm) and below ({sup 136}Pm,{sup 142}Tb) the N = 82 shell gap were presented along with an interpretation for the isomers. Finally, the future prospects of the technique, using an isomer-tagged differential-plunger setup, were discussed. This technique will be capable of establishing the deformation of the states above the isomers and will aid in the process of assigning underlying single-particle configurations to the isomeric states.

• OSTI ID: 21039475
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 961; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DEFORMED NUCLEI
ISOMERIC NUCLEI
NUCLEAR DEFORMATION
NUCLEAR STRUCTURE
PROMETHIUM 136
PROPORTIONAL COUNTERS
PROTONS
TERBIUM 142
THULIUM 152
YTTERBIUM 153