Characterization of isomers in /sup 158/Ho

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.33.2163· OSTI ID:5610024

Sood, P C; Hoff, R W; Sheline, R K

The experimentally known isomers of /sup 158/Ho have been characterized by estimating the energies of two-quasiparticle excitations. Included in this modeling is the effect of a residual n-p interaction. A 21-min isomer is assigned the configuration K/sup ..pi../ = 9/sup +/)(7/2)/sup -/(523up-arrow) /sub p/+(11/2)/sup -/(505up-arrow)/sub n/) and is predicted to lie 180 keV above the 5/sup +/ ground state. The antiparallel K/sup ..pi../ = 2/sup +/ state of this configuration is assigned to an observed level at 316 keV. The 21-min isomer decays by an allowed unhindered transition to a 2528-keV level in /sup 158/Dy for which we confirm the two-quasineutron configuration K/sup ..pi../ = 8/sup +/)(5/2)/sup -/(523arrow-down) /sub n/ +(11/2)/sup -/(505up-arrow)/sub n/). A 27-min 2/sup -/ isomer at 67.3 keV and a 29-ns 5/sup -/ isomer at 156.9 keV are assigned the configuration )(7/2)/sup +/(404arrow-down)/sub p/ minus-or-plus(3/2)/sup -/(521up-arrow)/sub n/). A 1.85-ns 1/sup -/ isomer at 139.2 keV is assigned the configuration )(5/2)/sup +/(402up-arrow)/sub p/ +(3/2)/sup -/(521up-arrow)/sub n/) and the K/sup ..pi../ = 4/sup -/ member of this Gallagher-Moszkowski pair is predicted to occur at 70 keV. Specific experiments are suggested to verify these predictions.

• Research Organization: Department of Physics, Banaras Hindu University, Varanasi 221005, India; Nuclear Chemistry Division, Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 5610024
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 33:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651813* -- Nuclear Properties & Reactions
A=150-189
Theoretical-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR MOMENTUM
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BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DEFORMED NUCLEI
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NUCLEAR MODELS
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PARTICLE INTERACTIONS
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RADIOISOTOPES
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