/sup 232/Th(n,. gamma. ) cross section from 2. 6 to 800 keV

Journal Article · Thu Dec 01 04:00:00 EST 1977 · Nucl. Sci. Eng.; (United States)

OSTI ID:5334150

Macklin, R L; Halperin, J

Neutron capture by isotopically purified /sup 232/Th was measured at the Oak Ridge Electron Linear Accelerator. The pulse-height weighting method was used with small liquid scintillators to measure the prompt gamma-ray energy release following neutron capture. Resonance parameters were derived up to 10 keV. The average radiative width was (19.8 +- 0.2 statistical +- 0.4 systematic) MeV for 50 resonances in the 2.6- to 4.0-keV interval. Strength functions 10/sup 4/ S/sub 0/ = 0.365 +- 0.024, 10/sup 4/ S/sub 1/ = 1.078 +- 0.057, 10/sup 4/ S/sub 2/ > 0.842 +- 0.084, and Gamma-bar/sub ..gamma..//D/sub 0/ = 0.0198/(13.24 +- 0.71) were found to fit the average cross section well (to 105 keV) when allowance was made for p-wave inelastic competition above the 50-keV threshold. While the values stated gave the best fit (from 2.6 to 105 keV) when all four were allowed to vary, it is likely that ''acceptable'' fits could be forced for other values. Recent evaluations of the cross section range from 8 to 50% higher than results reported here.

• Research Organization: Oak Ridge National Lab., TN
• OSTI ID: 5334150
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 64:4; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652025* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CAPTURE
ELECTROMAGNETIC RADIATION
ENERGY RANGE
EVEN-ODD NUCLEI
FUNCTIONS
GAMMA RADIATION
HADRON REACTIONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
KEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
RADIATIONS
RADIOISOTOPES
STRENGTH FUNCTIONS
TARGETS
THORIUM 232 TARGET
THORIUM 233
THORIUM ISOTOPES