THE (n,2n) CROSS-SECTION OF Th$sup 232$ FOR FISSION NEUTRONS
Technical Report
·
OSTI ID:4307615
The mean value of the (n,2n) cross section of Th/sup 232/ for neutrons from U/sup 235/ fission has been determined. Decigram quantities of thorium nitrate were irradiated inside a hollow fuel element in the BEPO reactor. The Th/ sup 233/ formed was allowed to decay into Pa/sup 233/, which was then chemically separated from the thorium together with the fission products. Thc quantity of Th/sup 231/ produced was found by measuring the intensity of the 25.6 kev gamma ray coming from the decay of this isotope using a krypton filled proportional counter. A U/sup 235/ fission foil was used for the intensify calibration of the counter. Animonium sulfate was used as a flux monitor, the activity of the P/sup 32/ from the threshold reaction S/sup 32/ (n,p)P/sup 32/ giving tbe flux. A value of 12.4 plus or minus 0.6 millibarns was obtained for the mean value of the (n,2n) cross section of Th/sup 232/ in a fission spectrum. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Research Group. Atomic Energy Research Establishment, Harwell, Berks, England
- NSA Number:
- NSA-12-006221
- OSTI ID:
- 4307615
- Report Number(s):
- AERE-R/R-2366
- Country of Publication:
- United Kingdom
- Language:
- English
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Related Subjects
ACTIVATION
AMMONIUM COMPOUNDS
BEPO
CROSS SECTIONS
DECAY
ENERGY RANGE
FISSION
FISSION PRODUCTS
FOILS
FUEL ELEMENTS
GAMMA RADIATION
IRRADIATION
ISOTOPES
KRYPTON
MEASURED VALUES
MONITORING
NEUTRON BEAMS
NEUTRONS
NUCLEAR REACTIONS
PHOSPHORUS 32
PHOTONS
PHYSICS
PROPORTIONAL COUNTERS
PROTACTINIUM 233
PROTONS
QUALITATIVE ANALYSIS
REACTORS
SEPARATION PROCESSES
SPECTRA
STANDARDS
SULFATES
SULFUR 32
THORIUM 231
THORIUM 232
THORIUM 233
THORIUM NITRATES
URANIUM 235
AMMONIUM COMPOUNDS
BEPO
CROSS SECTIONS
DECAY
ENERGY RANGE
FISSION
FISSION PRODUCTS
FOILS
FUEL ELEMENTS
GAMMA RADIATION
IRRADIATION
ISOTOPES
KRYPTON
MEASURED VALUES
MONITORING
NEUTRON BEAMS
NEUTRONS
NUCLEAR REACTIONS
PHOSPHORUS 32
PHOTONS
PHYSICS
PROPORTIONAL COUNTERS
PROTACTINIUM 233
PROTONS
QUALITATIVE ANALYSIS
REACTORS
SEPARATION PROCESSES
SPECTRA
STANDARDS
SULFATES
SULFUR 32
THORIUM 231
THORIUM 232
THORIUM 233
THORIUM NITRATES
URANIUM 235