Six-quasiparticle isomer in {sup 140}Nd

Journal Article · Fri Sep 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.034304· OSTI ID:20863776

Petrache, C M; Fantuzi, M; Mengoni, D; Petrache, D ^[1]; Bark, R A; Murray, S T. H.; Lawrie, E A; Lawrie, J J; Mullins, S M ^[2]; Lang, S; Maliage, S M; Ramashidzha, T M ^[2]; Ntshangase, S S ^[2]; Ragnarsson, I ^[3]

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1. Dipartimento di Fisica, Universita di Camerino and INFN, Sezione di Perugia, I-62032, Camerino (Italy)
2. iThemba LABS, PO Box 722, Somerset West 7129 (South Africa)
3. Department of Mathematical Physics, Lund Institute of Technology, S-22362 Lund (Sweden)

A search for isomeric states was performed in the nucleus {sub 60}{sup 140}Nd{sub 80} using in-beam {gamma}-ray spectroscopy and the {sup 126}Te({sup 18}O,4n) reaction. Prompt and delayed {gamma}-ray coincidences were measured with the AFRODITE spectrometer using the pulsed beam delivered by the Separated Sector Cyclotron of iThemba LABS. One new isomer was identified, with spin-parity I{sup {pi}}=20{sup +} and lifetime T{sub 1/2}{>=}400 ns, at an excitation energy E{sub x}=7430 keV. The lifetime of the 10{sup +} isomer at E{sub x}=3619 keV was determined to be 32.9(1.8) ns, confirming the previously reported value. The configuration of the I{sup {pi}}=20{sup +} isomer is assigned based on configuration-dependent cranked Nilsson-Strutinsky (CNS) calculations as a state {pi}(d{sub 5/2}g{sub 7/2}){sub 10{sup +}}{sup -4}x{nu}(h{sub 11/2}{sup -2}){sub 10{sup +}}, with the spin vectors of the six holes in the {sub 64}{sup 146}Gd{sub 82} core fully aligned.

• OSTI ID: 20863776
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 74; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITATION
GAMMA RADIATION
GAMMA SPECTROSCOPY
HIGH SPIN STATES
ISOCHRONOUS CYCLOTRONS
KEV RANGE
LIFETIME
NEODYMIUM 140
OXYGEN 18
OXYGEN 18 REACTIONS
PARITY
PARTICLE-HOLE MODEL
SPIN
STRUTINSKY THEORY
TELLURIUM 126
TELLURIUM 126 TARGET