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THE DECAY OF Pm$sup 14$$sup 9$

Journal Article · · Canadian Journal of Physics (Canada)
DOI:https://doi.org/10.1139/p60-161· OSTI ID:4106079
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The 52.8-hr activity of Pm/sup 149/ was investigated using a high resolution beta spectrometer, a lens type coincidence spectrometer, and a scintillation spectrometer in conjunction with a multichannel analyzer. The beta spectrum was found to consist of two groups with maximum energies of 1.072 plus or minus 0.002 and 0.786 plus or minus 0.004 Mev and intensities of 97.1 plus or minus 0.4 and 2.9 plus or minus 0.4%, respectively. A gamma ray of energy 285.7 plus or minus 0.3 kev was found to be in coincidence with the 0.786 Mev beta group. No other gamma rays with intensities greater than 0.1% were found. The K conversion coefficient for the 286 kev transition was measured to be 0.075 plus or minus 0.008. This together with the values of 6.5 plus or minus 0.7 and 4 plus or minus 1 obtained for the K/L and L/M conversion ratios, respectively, indicate that this transition is M1 in character with less than lO% E2 admixture. (auth)
Research Organization:
McMaster Univ., Hamilton, Ont.
Sponsoring Organization:
USDOE
NSA Number:
NSA-15-005632
OSTI ID:
4106079
Journal Information:
Canadian Journal of Physics (Canada), Journal Name: Canadian Journal of Physics (Canada) Vol. Vol: 38; ISSN CJPHA
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BETA SPECTROMETERS
CONVERSION
DECAY
GAMMA RADIATION
HALF-LIFE
LENSES
MEASURED VALUES
PHYSICS
PROMETHIUM
SCINTILLATION COUNTERS