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U.S. Department of Energy
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Absolute measurement of $sup 235$U fission cross-section for 2200 m/sec neutrons

Technical Report ·
OSTI ID:4938617
The results of an absolute fission cross-section measurement of /sup 235/ U are presented; the thermal neutrons were selected by the time-of-flight method. The principle of the method and the experimental apparatus are described. The method had the advantage of avoiding the use of an intermediate cross section in the neutron flux determination by choice of a B target thick enough to absorb all thermal neutrons. Target preparation, efficiency determination, corrections, etc., are reported. The value determined was 581.7 plus or minus 7.8 barns. (6 figures, 4 tables) (RWR)
Research Organization:
Institutul de Fizica Atomica, Bucharest (Romania)
Sponsoring Organization:
Sponsor not identified
NSA Number:
NSA-29-025620
OSTI ID:
4938617
Report Number(s):
IFA-NR--47-1973
Country of Publication:
Romania
Language:
English