Search for strongly deformed structures and observation of multiple nucleon alignments in {sup 174}W

Journal Article · Fri Feb 15 04:00:00 EST 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.024313· OSTI ID:21068118

Tandel, S K; Knox, A J; Parnell-Lampen, C; Tandel, U S; Chowdhury, P; Carpenter, M P; Janssens, R V. F.; Khoo, T L; Lauritsen, T; Lister, C J; Seweryniak, D; Wang, X; Zhu, S; Hartley, D J; Zhang, Jing-ye ^[1]

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1. Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854 (United States)

Highly excited states, up to spin 39({Dirac_h}/2{pi}), have been established in {sup 174}W, using the Gammasphere array. Ultimate cranker calculations predict the appearance of triaxial, strongly deformed structures above spin 30({Dirac_h}/2{pi}) in {sup 174}W. A new approach was developed for a comprehensive search of the data for such structures, similar to those observed in the Lu and Hf isotopes. No evidence was found for strongly deformed bands in the W isotopes populated in this experiment. Existing rotational structures have been considerably extended, allowing for the observation of both neutron and proton alignments in a number of bands. There is evidence for the i{sub 13/2} neutron and possibly both the h{sub 9/2} and h{sub 11/2} proton crossings. The observed neutron and proton crossing frequencies are in good agreement with predictions of Woods-Saxon cranking calculations using an empirical pair-gap energy, and they lead to an improved understanding of the underlying structure of the bands.

• OSTI ID: 21068118
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 2 Vol. 77; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY GAP
EXCITED STATES
GAMMA SPECTROSCOPY
HAFNIUM ISOTOPES
LUTETIUM ISOTOPES
NEUTRONS
NUCLEAR STRUCTURE
PAIRING INTERACTIONS
PROTONS
SPIN
TUNGSTEN 174
WOODS-SAXON POTENTIAL