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GAMMA-GAMMA COINCIDENCE MEASUREMENTS OF Ba$sup 13$$sup 1$

Technical Report ·
OSTI ID:4201794
The energies of the high-energy gamma rays in the decay of Ba/sup 131/ were measured and found to be: 810 plus or minus 10, 925 plus or minus 10, and 1050 plus or minus 15 kev, in agreement with a previous measurement. The existence of a 405-kev gamma ray in coincidence with the 214-kev gamma ray has been confirmed. It was determined that there are two gamma rays with energies of approximately 250 kev, one in coincidence with the 122-kev gamma ray and the other in coincidence with the 372-kev gamma ray. The 496 to 122 kev cascade was investigated. The K conversion coefficient for the 496-kev gamma ray was determined 10 be (10.5 plus or minus 1.0) x 10/sup -3/. The gamma-gamma angular correlation was found to be isotropic with both liquid and metallic barium sources. The K/L conversion ratio for the 122-kev gamma ray was determined 10 be 2.7 plus or minus 0.5. These results are consistent with a 3/ 2(M1) 1/2 (E2) 5/2 cascade or a 3/2 (Ml + E2) 5/2 (Ml + E2) 5/2 cascade with certain possible mixing ratios. Additional experiments are proposed, the results of which should make a decision between these two cases possible. (auth)
Research Organization:
Army Rocket and Guided Missile Agency, Redstone Arsenal, Ala.
NSA Number:
NSA-13-022874
OSTI ID:
4201794
Report Number(s):
ARGMA-TR-1C32R; Project TB2-0001
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ANGULAR DISTRIBUTION
BARIUM 131
COINCIDENCE METHODS
DECAY
ENERGY
GAMMA RADIATION
INTERNAL CONVERSION
LIQUIDS
MEASURED VALUES
METALS
NUCLEAR MODELS
PHYSICS AND MATHEMATICS
SPECTRA