Shell-model interpretation of the. beta. sup minus decay of sup 212 Bi sup g , sup 212 Bi sup m 1 , and sup 212 Bi sup m 2

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review, C (Nuclear Physics); (USA)

DOI:https://doi.org/10.1103/PhysRevC.44.261· OSTI ID:5607457

Warburton, E K ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973 (US)

The {beta}{sup {minus}} decay of the {sup 212}Bi ground state ({ital T}{sub 1/2}=61 min) and the isomers {sup 212}Bi{sup {ital m}1} ({ital T}{sub 1/2}=27 min), and {sup 212}Bi{sup {ital m}2} ({ital T}{sub 1/2}=8 min) are considered in the spherical shell model. The wave functions and energy spectra of all even and odd states in the Kuo-Herling model space were calculated for both {sup 212}Bi and {sup 212}Po. Possible candidates for the two {sup 212}Bi isomers were located from these results and the allowed and first-forbidden {beta}{sup {minus}} decays rates were formed using a recently developed parametrization of first-forbidden decays in the lead region. It was concluded that {sup 212}Bi{sup {ital m}1} is the yrast 8{sup {minus}} state and {sup 212}Bi{sup {ital m}2} the yrast 18{sup {minus}} state of {sup 212}Bi. The decay rates calculated for these two {beta}{sup {minus}} emitters are in excellent agreement with experiment. The predictions for the decay of the ground state of {sup 212}Bi are not in good agreement with experiment, illustrating the difficulty of calculating weak first-forbidden decay modes reliably.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5607457
• Journal Information: Physical Review, C (Nuclear Physics); (USA), Journal Name: Physical Review, C (Nuclear Physics); (USA) Vol. 44:1; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653005* -- Nuclear Theory-- Radioactive Decay
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
BISMUTH 212
BISMUTH ISOTOPES
DAYS LIVING RADIOISOTOPES
DECAY
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
FORBIDDEN TRANSITIONS
FUNCTIONS
GAMOW-TELLER RULES
GROUND STATES
HALF-LIFE
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
ISOMERIC NUCLEI
ISOTOPES
MATHEMATICAL MODELS
MATRIX ELEMENTS
MINUTES LIVING RADIOISOTOPES
NANOSEC LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEAR MODELS
NUCLEI
ODD-ODD NUCLEI
PARITY
PARTICLE PROPERTIES
POLONIUM 212
POLONIUM ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SHELL MODELS
SPECTRA
SPIN
WAVE FUNCTIONS
YEARS LIVING RADIOISOTOPES
YRAST STATES