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A FAST-NEUTRON ACTIVATION DETECTOR FOR 14-Mev PULSED NEUTRON SOURCES

Technical Report ·
OSTI ID:4818996
A fast-neutron activation detector is described in which the gamma rays resulting from the decay of Pb/sup 207m/ are observed in a plastic scintillator. The Pb/sup 207m/ produced by fast-neutron activation of a lead shield which surrounds the scintillator and photomultiplier. Following a 20-msec delay from the neutron pulse, the Pb/sup 207m/ activity is observed for 2.40 sec. A source of Ba/sup 133/ is used to check the gain stability of the detection system. The detector is observed to have somewhat higher sensitivity than a standard silver activation detector. (auth)
Research Organization:
California. Univ., Berkeley. Lawrence Radiation Lab.
DOE Contract Number:
W-7405-ENG-48
NSA Number:
NSA-16-001950
OSTI ID:
4818996
Report Number(s):
UCRL-9861
Country of Publication:
United States
Language:
English

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