A measurement of the thermal neutron capture cross section of /sup 232/Th
The thermal neutron capture cross section of /sup 232/Th has been measured relative to that of /sup 197/Au. Foils of gold, thorium metal, and thoria were irradiated together in the NRU reactor thermal column. The /sup 198/Au activity was assayed in a 4..pi gamma.. ionization chamber, which had been previously calibrated with samples of /sup 198/Au standardized by the 4..pi beta..-..gamma.. coincidence method. Protactinium-233 sources were also standardized by this method. Comparison of these sources with the irradiated thorium, by means of a Ge(Li) spectrometer, enabled the /sup 233/Pa activity in the thorium-bearing foils to be determined. Taking the 2200 m/s capture cross section of /sup 197/Au to be 98.8 b, that of /sup 232/Th is found to be 7.33+.0.06b. The uncertainty is at the 95% confidence level and includes an estimate of the systematic uncertainties.
- Research Organization:
- Chalk River Nuclear Labs., Chalk River, Ontario K0J 1J0
- OSTI ID:
- 5272776
- Journal Information:
- Nucl. Sci. Eng.; (United States), Vol. 93:2
- Country of Publication:
- United States
- Language:
- English
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NEUTRON REACTIONS
CAPTURE
TOTAL CROSS SECTIONS
THORIUM 232 TARGET
CALIBRATION
COINCIDENCE METHODS
COMPARATIVE EVALUATIONS
FOILS
GOLD 197
GOLD 198
IONIZATION CHAMBERS
IRRADIATION
LI-DRIFTED GE DETECTORS
NRU REACTOR
PROTACTINIUM 233
STANDARDIZATION
THERMAL NEUTRONS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
COUNTING TECHNIQUES
CROSS SECTIONS
DAYS LIVING RADIOISOTOPES
ELEMENTARY PARTICLES
FERMIONS
GE SEMICONDUCTOR DETECTORS
GOLD ISOTOPES
HADRON REACTIONS
HADRONS
HEAVY NUCLEI
HEAVY WATER COOLED REACTORS
HEAVY WATER MODERATED REACTORS
IRRADIATION REACTORS
ISOMERIC TRANSITION ISOTOPES
ISOTOPE PRODUCTION REACTORS
ISOTOPES
LI-DRIFTED DETECTORS
MEASURING INSTRUMENTS
NATURAL URANIUM REACTORS
NEUTRONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PROTACTINIUM ISOTOPES
RADIATION DETECTORS
RADIOISOTOPES
REACTORS
RESEARCH AND TEST REACTORS
RESEARCH REACTORS
SECONDS LIVING RADIOISOTOPES
SEMICONDUCTOR DETECTORS
STABLE ISOTOPES
TANK TYPE REACTORS
TARGETS
TEST REACTORS
652025* - Nuclear Properties & Reactions
A=220 & above
Experimental- Nuclear Reactions & Scattering- (-1987)