DECAY OF 16-MINUTE Ta$sup 182$m
A revised decay scheme of the 16-min isomer Ta/sup 182//sup m/ in volves three states of Ta/sup 182/ at excitation energies of 147, 319, and 503 kev. Transition multipolarities were classified by measuring both gamma -ray coincidences and internal conversion electrons. The 503-kev isomeric atate decays mainly (98%) by a 184-kev E3 transition to the 319-kev state. This 319- kev atate decays mainly (94%) to the 147kev state by means of a 172-kev transition that is predominantly M1. The 147-kev transition to the ground state is also predominantly M1. Two of the three possible crossover transitions were observed; a 356-kev M4 transition originates at the isomeric level and a 319-kev E2 transition connects the second excited state with the ground state. The 147- kev and the 319-kev states are probably the first and second excited rotational states of the ground-state configuration. The relevant rotational parameters are of particular interest because very little is known about moments of inentia for odd-edd nuclei. The relative prohabilities were determined for pile neutron activation of the 16-min isomer, Tai/sup 182//sup m/, and the 112-day ground state Ta/sup 18/ s/sup 2/. (auth)
- Research Organization:
- Brookhaven National Lab., Upton, N.Y.
- NSA Number:
- NSA-15-012196
- OSTI ID:
- 4082379
- Report Number(s):
- BNL-4863; 0031-899X
- Journal Information:
- Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Vol. Vol: 121; Other Information: BNL-4863. Orig. Receipt Date: 31-DEC-61
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ACTIVATION
ATOMIC MODELS
BETA DETECTION
COINCIDENCE METHODS
CONFIGURATION
DECAY
DIPOLES
ELECTRIC FIELDS
ELECTRIC MOMENTS
ELECTRONS
ENERGY LEVELS
EXCITATION
GAMMA DETECTION
GAMMA RADIATION
GAMMA SPECTROMETERS
HALF-LIFE
INTERNAL CONVERSION
ISOMERS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MEASURED VALUES
MOLECULES
MOMENTUM
MULTIPOLARITY
MULTIPOLE RADIATION
NEUTRONS
NUCLEAR MODELS
NUCLEI
ODD ODD NUCLEI
QUADRUPOLES
RADIATIONS
RESEARCH REACTORS
ROTATION
TANTALUM 182
TRANSIENTS