Fission product beta and gamma energy release. Quarterly progress report for January--March 1977
Fission chambers containing foils of 200 ..mu..g to 800 ..mu..g /sup 235/U were exposed to an external beam of thermal neutrons of approximately 10/sup 8/ n/cm/sup 2 -/s for approximately 30 hours. Counting rates and pulse-height spectra were observed. Following the end of the exposure the chambers were moved to the low-background counting area, and the resulting fission-product gamma rays were counted by use of a 90-cm/sup 3/ Ge(Li) detector for 12 h to 3 wk after the end of irradiation. For E/sub ..gamma../ = 140.5 keV (/sup 99/Mo), 228 keV (/sup 132/Te), and 658 keV (/sup 97/Nb from /sup 97/Zr), and for source-to-detector distances of 20, 30, and 200 mm, K-factors were determined to +- 2/sup 1///sub 2/ percent which relate the measured total number of fissions, n/sub f/, to the measured ..gamma..-ray yields. These data were then used to determine n/sub f/ for selected samples run earlier in the program, with the resulting n/sub f/ being approximately 1.5 percent lower than previously measured. Similar chambers were made containing 100-..mu..g to 200-..mu..g foils of /sup 239/Pu. These chambers were exposed for approximately 45 hours and then were studied by use of the 90-cm/sup 3/ Ge(Li) detector. 2 figures, 2 tables.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7218394
- Report Number(s):
- ORNL/NUREG/TM-121
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
FISSION PRODUCTS
AFTER-HEAT
NEUTRON REACTIONS
THERMAL FISSION
PLUTONIUM 239 TARGET
URANIUM 235 TARGET
BETA DECAY
ENERGY
ENERGY-LEVEL TRANSITIONS
FISSION YIELD
THERMAL NEUTRONS
BARYON REACTIONS
BARYONS
BASIC INTERACTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FISSION
HADRON REACTIONS
HADRONS
INTERACTIONS
ISOTOPES
LEPTONIC DECAY
NEUTRONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PARTICLE DECAY
RADIOACTIVE MATERIALS
TARGETS
WEAK INTERACTIONS
WEAK PARTICLE DECAY
YIELDS
652026* - Nuclear Properties & Reactions
A=220 & above
Experimental- Spontaneous & Induced Fission- (-1987)