/sup 238/U(n,f) measurements below 100 keV

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

OSTI ID:7218393

Slovacek, R E ^[1]; Cramer, D S; Bean, E B; Valentine, J R; Hockenbury, R W; Block, R C

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1. Knolls Atomic Power Lab., Schenectady, NY

The /sup 238/U(n,f) cross section has been measured from 3 eV to 100 keV with the Rensselaer Intense Neutron Spectrometer, a 75-ton lead slowing down spectrometer at the Gaerttner Laboratory at Rensselaer Polytechnic Institute. Four fission ionization chambers containing a total of 0.8 g of /sup 238/U (4.1 ppM /sup 235/U) were used for the measurements. The fission widths of the 6.67-, 20.9-, and 36.8-eV resonances were measured as (10 +- 1), (58 +- 9), and (12 +- 2) neV, respectively. By combining these fission results and published resonance parameters, the /sup 238/U thermal fission cross-section contribution from positive energy resonances was determined to be (2.7 +- 0.3) ..mu..b. The resonance fission integral from 0.4 eV to 100 keV was determined to be (1.30 +- 0.15) mb.

• OSTI ID: 7218393
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 62:3; ISSN NSENA
• Country of Publication: United States
• Language: English

Related Subjects

652026* -- Nuclear Properties & Reactions
A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYON REACTIONS
CROSS SECTIONS
FISSION
HADRON REACTIONS
INTEGRALS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
RESONANCE INTEGRALS
TARGETS
URANIUM 238 TARGET