Origin of unit alignment in superdeformed bands in A{approx}190 nuclei

Journal Article · Fri Oct 01 04:00:00 EDT 1999 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.60.044301· OSTI ID:692517

Fallon, P; Clark, R M; Stephens, F S; Deleplanque, M A; Diamond, R M; Lee, I Y; Macchiavelli, A O; Vetter, K ^[1]; Heenen, P ^[2]

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1. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
2. Service de Physique Nucleaire Theorique, U.L.B.-C.P.229, B-105020 Brussels (Belgium)

The results of an experimental and theoretical study of the inertias and alignments of superdeformed bands (SD) in A{approximately}190 nuclei are presented. We show that A{approximately}190&hthinsp;SD bands tend to be distributed among three groups characterized by their alignments and the number of unpaired nucleons. The alignments cluster around integer values (i{approx}{minus}1,0,1, relative to the reference chosen for this study), but the distribution is not strongly peaked: rather it is relatively {open_quotes}broad{close_quotes} compared with the separation, suggesting that the {open_quotes}strict{close_quotes} quantized alignments observed in some nuclei are not a systematic feature of all A{approximately}190&hthinsp;SD bands. We further show that mean-field calculations reproduce the general experimental properties and give the three band groups seen in experiment, but they do not generally reproduce the specific alignment of SD band pairs; nor, in general, do they give {open_quotes}good{close_quotes} identical bands. thinsp {copyright} {ital 1999} {ital The American Physical Society}

• OSTI ID: 692517
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 4 Vol. 60; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
ALIGNMENT
BAND THEORY
MEAN-FIELD THEORY
MOMENT OF INERTIA
NUCLEAR MODELS
NUCLEAR STRUCTURE
SUPERDEFORMED NUCLEI