RADIOACTIVITY OF $sup 178$Ta, $sup 179$Ta AND $sup 180$Ta
Journal Article
·
· Proc. Phys. Soc. (London)
The neutron deficient isotopes Ta/sup 178/, Ta/sup 179/, and Ta/sup 180 have been produced by phoWdisintegration of Ta/sup 181/ and studied with scintillation spectrometers used singly and in coincidence. The identification of each isotope is based on a knowledge of the ( gamma ,n) threshold and an appropriate choice of bremsstrahlung energies. Radioactive Ta/sup 178/ is shown to comprise an isometric doublet with half lives 9.5 plus or minus 0.1 min and 150 plus or minus 10 min. The 9.5 min activity populates levels in Hf/sup 178/ at 0, 91, and possibly 1480 kev, the first two by both electron capture and BETA /sup +/ emission and the last by electron capture, while the 150 min activity decays by electron capture to a level of Hf/sup 178/ at 1046 kev. A decay scheme is proposed based on the experimental results and the strong coupling collective model of Bohr and Mottelson. Evidence is presented to support the recent contention that Ta/sup 179/ decays by electron capture to the ground staff of Hf/ sup 179/. The observed gamma radiation from 8.15 hour Ta/sup 180/ is in general agreement with the decay scheme of Brown et al, except that there is no evidence for gamma radiation in the energy range 175 to 450 kev. (auth)
- Research Organization:
- Australian National Univ., Canberra
- NSA Number:
- NSA-12-009384
- OSTI ID:
- 4346497
- Journal Information:
- Proc. Phys. Soc. (London), Journal Name: Proc. Phys. Soc. (London) Vol. Vol: 71
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Neutron capture cross sections of /sup 178/,/sup 179/,/sup 180/Hf and the origin of nature's rarest stable isotope /sup 180/Ta
L TO K RATIOS IN THE ELECTRON CAPTURE DECAY OF W$sup 181$ AND Ta$sup 17$$sup 9$
PRODUCTION OF Lu$sup 178$ BY THE Ta$sup 181$(n,/cap alpha/)Lu$sup 178$ REACTION IN THE NRX REACTOR
Conference
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:7079505
L TO K RATIOS IN THE ELECTRON CAPTURE DECAY OF W$sup 181$ AND Ta$sup 17$$sup 9$
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·
Sun Oct 01 00:00:00 EDT 1961
· Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
·
OSTI ID:4824007
PRODUCTION OF Lu$sup 178$ BY THE Ta$sup 181$(n,/cap alpha/)Lu$sup 178$ REACTION IN THE NRX REACTOR
Journal Article
·
Tue Feb 28 23:00:00 EST 1961
· Canadian Journal of Physics (Canada)
·
OSTI ID:4049989
Related Subjects
BOHR-MOTTELSON MODEL
BREMSSTRAHLUNG
CAPTURE
COINCIDENCE METHODS
DECAY
ELECTRONS
ENERGY
ENERGY LEVELS
GAMMA RADIATION
HAFNIUM 178
HAFNIUM 179
HALF-LIFE
ISOMERS
MEASURED VALUES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
PHOTOFISSION
PHYSICS
POSITRONS
RADIOACTIVITY
SCINTILLATION COUNTERS
TANTALUM 178
TANTALUM 179
TANTALUM 180
TANTALUM 181
BREMSSTRAHLUNG
CAPTURE
COINCIDENCE METHODS
DECAY
ELECTRONS
ENERGY
ENERGY LEVELS
GAMMA RADIATION
HAFNIUM 178
HAFNIUM 179
HALF-LIFE
ISOMERS
MEASURED VALUES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
PHOTOFISSION
PHYSICS
POSITRONS
RADIOACTIVITY
SCINTILLATION COUNTERS
TANTALUM 178
TANTALUM 179
TANTALUM 180
TANTALUM 181