Measurement of the integral capture and fission cross sections for /sup 232/Th in the CFRMF

Conference · Sun Dec 31 23:00:00 EST 1978

OSTI ID:5696928

Anderl, R. A.; Harker, Y. D.

The recent evaluation of the cross-section data bases for /sup 232/Th capture and fission emphasized significant normalization discrepancies between the available differential data. To help resolve the normalization discrepancies, the capture and fission integral cross sections were measured for /sup 232/Th in the fast neutron zone of the Coupled Fast Reactivity Measurements Facility (CFRMF). The cross sections are derived from the radiometric determination of the saturation reaction rates for fission and capture based on the Ge(Li) spectrometric measurement of the absolute gamma emission rates of the 537-keV and 1596-keV lines in the /sup 140/Ba - /sup 140/La decay and the 311.9-keV line in the /sup 233/Pa decay. For capture and fission, respectively, the measured integral cross sections are 291 mb +- 3% and 19.6 mb +- 5%. The ratios of the integral cross sections computed with ENDF/B-IV thorium cross sections and the CFRMF neutron spectrum to the above values are 0.99 for capture and 0.90 for fission. 19 references.

• Research Organization: Idaho National Engineering Lab., Idaho Falls (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-07-1570
• OSTI ID: 5696928
• Report Number(s): CONF-791058--19
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
652026 -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CAPTURE
CROSS SECTIONS
DATA
DATA FORMS
EXPERIMENTAL DATA
FISSION
HADRON REACTIONS
INFORMATION
INTEGRAL CROSS SECTIONS
ISOLATED VALUES
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUMERICAL DATA
TARGETS
THORIUM 232 TARGET