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SHORT-LIVED BROMINE AND SELENIUM NUCLIDES FROM FISSION

Journal Article · · J. Inorg. & Nuclear Chem.
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A 6.0 plus or minus 0.2 min bromine activity was found in fission products and in rubidium bombarded with d-t neutrons. Experiments with enriched Rb/sup 85/ and Rb/sup 87/ support its assignment as an isomer of Br/sup 84/. beta - and gamma -scintillation counting with 100-channel pulse analysis indicate beta groups of 0.8 plus or minus 0.1 Mev (20%), 1.9 plus or minus 0.2 Mev (72%), and possibly 3.2 Mev (--8%), plus prominent gamma rays of 0.44 plus or minus 0.01 Mev 1.89 plus or minus 0.03 Mev (16%). The U/sup 235/ thermal fission yields of the 6.0 min Br/sup 84/ and the 31.7 min Br/sup 84/ are 0.019 plus or minus 0.003% and 0.92 plus or minus 0.06%, respectively. By rapid separation of selenium from fission products and subsequent milking of the bromine daughters the half-lives of Se/sup 84/ and Se/sup 85/ were measured as 3.3 plus or minus 0.2 min and 39 plus or minus 4 sec. respectively. The 6.0 min Br/sup 84/ does not appear to grow from selenium. The experiments also produced evidence for a 16 plus or minus 3 sec selenium parent of a 1.0 min bromine activity which is probably Br/sup 87/ (auth)

Research Organization:
Los Alamos Scientific Lab., N. Mex.
NSA Number:
NSA-14-014357
OSTI ID:
4141190
Journal Information:
J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 12
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

BETA DETECTION-- BETA PARTICLES-- BROMINE 84-- DECAY-- ENERGY LEVELS-- GAMMA DETECTION-- GAMMA RADIATION-- HALF-LIFE-- ISOMERS-- MEASURED VALUES-- NEUTRON BEAMS-- NEUTRON SOURCES-- NUCLEAR REACTIONS-- PULSE ANALYZERS-- RADIOACTIVITY-- RUBIDIUM-- RUBIDIUM 85-- RUBIDIUM 87-- SCINTILLATION COUNTERS-- TARGETS
BROMINE 84-- DECAY-- EFFICIENCY-- FISSION-- FISSION PRODUCTS-- HALF-LIFE-- ISOMERS-- MEASURED VALUES-- RADIOACTIVITY-- SEPARATION PROCESSES-- THERMAL NEUTRONS-- URANIUM 235
BROMINE 87-- DECAY-- HALF-LIFE-- MEASURED VALUES-- RADIOACTIVITY-- SELENIUM
DEUTERONS-- NEUTRON SOURCES-- NEUTRONS-- NUCLEAR REACTIONS-- TARGETS-- TRITONS
EFFICIENCY-
PHYSICS