DECAY OF Hf$sup 130$m

Journal Article · Wed Mar 01 04:00:00 EST 1961 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.121.1499· OSTI ID:4075513

Edwards, W F; Boehm, F

The energies and relative intensities of the gamma radiation and the relative intensities of the conversion electrons following the decay of 5.5-hr Hf/ sup 180//sup m/ have been measured using the curved-crystal gamma -ray spectrometer (recently calibrated for accurate intensity measurements), the ring- focused beta ray spectrometer, and the semicircular spectrometer at the California Institute of Technology. The measured transition energies are: 57.54 plus or minus 0.01, 93.33 plus or minus 0.02, 215.25 plus or minus 0.13, 332.5 plus or minus 0.3, and 443.8 plus or minus 0.6 kev. The energy levels deduced from these values are not entirely consistent with the twoparameter rotational formula. Conversion coefficients derived from the measurements are absolutely normalized using a method involving information available from the decay scheme. All of the 57.54-kev transition conversion coefficients are anomalously high if compared with the theoretical El coefficients. No admixture of M2 + E3 can account for the anomaly. The K conversion coefficients of the E2 transitions are all about 10% low with exception of the 93.33-kev transition. The L ccefficients have a varying deviation. the maximum being 12%. The K conversion coefficient of the 501.3-kev transition has the value 0.037 plus or minus 0.012, which is consistent with the theoretical E3 value of 0.040. (auth)

• Research Organization: California Inst. of Tech., Pasadena
• NSA Number: NSA-15-013737
• OSTI ID: 4075513
• Journal Information: Physical Review (U.S.) Superseded in part by Phys.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 D, Journal Name: Physical Review (U.S.) Superseded in part by Phys.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; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

DECAY
EFFICIENCY
ELECTRONS
ENERGY LEVELS
GAMMA DETECTION
GAMMA RADIATION
HAFNIUM 180
HALF-LIFE
INTERNAL CONVERSION
ISOMERS
MEASURED VALUES
PHYSICS