K/L+M CONVERSION RATIOS OF TRANSITIONS AMONG THE EXCITED STATES OF Sm$sup 148$ POPULATED BY THE DECAY OF Pm$sup 14$$sup 8$
Thesis/Dissertation
·
OSTI ID:4165737
The K/L+M conversion ratios of the 286-, 550-, and 627kev transitions among the excited states of Sm/sup 148/ populated by the decay of Pm/sup 148/ were measured using a shallow diffused silicon p-n junction detector. The reliability of the p-n junction detector as an instrument for the quantitative measurement of K/L+M conversion ratios was established by measuring the K/L+M conversion ratios of Hg/sup 203/, Au/sup 198/, Cs/sup 137/, and Bi/sup 207/ and comparing the values obtained with those of previous workers using other methods. For the measurements of the K/L+M conversion ratios of the transitions in Sm/sup 148/, the p-n junction detector was employed in an arrangement which afforded the use of BETA - gamma coincidence techniques. The values obtained were: (K/L+M)/ sub 286/ = 7.0 plus or minus 1.0; (K/L+M)/sub 550/ = 5.1 plus or minus 0.3; and (K/L+M)/sub 627/ = 5.4 plus or minus 0.4. The K/L+M ratio measured for the 288-kev transition, permits an M1 + E2 multipolarity assignment to this transition, and indicates a 6 + yields 6 + transition between 2.19- and 1.90- Mev states in Sm/sup 148/. (Dissertation Abst.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-18-001089
- OSTI ID:
- 4165737
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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