Accurate Lifetime Measurements of Superdeformed Bands in A {approx} 80 Nuclei

Journal Article · Sun Dec 26 23:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.83.5447· OSTI ID:20215115

Lerma, F ^[1]; Devlin, M ^[1]; LaFosse, D R ^[1]; Sarantites, D G ^[1]; Wyss, R ^[2]; Baktash, C ^[3]; Clark, R M ^[4]; Lee, I Y ^[4]; Macchiavelli, A O ^[4]; MacLeod, R W ^[4]

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1. Chemistry Department, Washington University, St. Louis, Missouri 63130 (United States)
2. KTH, Department of Physics-Frescati, Frescativaegen 24, S-104 05, Stockholm (Sweden)
3. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 (United States)
4. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

Comparative measurements of the lifetimes of yrast superdeformed (SD) states in {sup 80-} {sup 83}Sr , {sup 83}Y , and {sup 84}Zr have been performed using the Doppler-shift attenuation method. Thus, the transition quadrupole moments (Q{sub t} ) of these structures have been determined accurately. The yrast SD bands in {sup 80-} {sup 83}Sr possess Q{sub t}{approx}3.5 e b , while the {sup 83}Y and {sup 84}Zr cases display Q{sub t}=4.4 e b and 5.6 e b , respectively. Intruder orbital assignments based on these results demonstrate a previously unnoticed transition in the structure of the SD bands when the proton number changes from Z=38 to Z{>=}39 . (c) 1999 The American Physical Society.

• OSTI ID: 20215115
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 26 Vol. 83; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
DOPPLER EFFECT
EXPERIMENTAL DATA
LIFETIME
QUADRUPOLE MOMENTS
STRONTIUM ISOTOPES
SUPERDEFORMED NUCLEI
YRAST STATES
YTTRIUM 83
ZIRCONIUM 84