20 {mu}s isomeric state in doubly odd {sub 61}{sup 134}Pm

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.024303· OSTI ID:21290043

Cullen, D M; Mason, P J. R; Rigby, S V; Kishada, A M; Varley, B J ^[1]; Scholey, C; Eeckhaudt, S; Grahn, T; Greenlees, P T; Jakobsson, U; Jones, P M; Julin, R; Juutinen, S; Ketelhut, S; Leino, M; Leppaenen, A -P; Maentyniemi, K; Nieminen, P; Nyman, M; Pakarinen, J ^[2]

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

Recoil-isomer tagging at the Accelerator Laboratory of the University of Jyvaeskylae has been used to establish the isomeric nature of a known (7{sup -}) excited state in the doubly odd nucleus {sup 134}Pm. The isomeric state was determined to have a half-life of 20(1) {mu}s and was populated from the decay of a {pi}h{sub 11/2} x {nu}h{sub 11/2} band using the {sup 92}Mo({sup 54}Fe,2{alpha}3pn) reaction at 305 and 315 MeV. The isomer decays by a 71-keV transition that provides an intermediate step in linking the established {sup 134}Pm high-spin level scheme to the lower-spin states observed from the {beta} decay of {sup 134}Sm. Electron-conversion analysis for the 71-keV {gamma}-ray transition reveals that it is of E1 character and its small reduced-transition probability suggests that {sup 134}Pm may have a nuclear shape more rigid than that of the neighboring nuclei.

• OSTI ID: 21290043
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 2; Other Information: DOI: 10.1103/PhysRevC.80.024303; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
BETA DECAY
ELECTRONS
EXCITED STATES
GAMMA RADIATION
HALF-LIFE
IRON 54
ISOMERS
MEV RANGE 100-1000
MOLYBDENUM 92 TARGET
PROMETHIUM 134
RECOILS
SAMARIUM 134
SPIN