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Low-background high-efficiency detector for the study of the (n,. cap alpha. ) reaction at pulsed neutron source

Journal Article · · Nucl. Technol.; (United States)
OSTI ID:7058796
The reported alpha-particle detector consists of eight flat proportional chambers connected in pairs. It is designed for measurement of the (n,..cap alpha..) reaction on resonance neutrons from a pulsed neutron source with a pulse duration of about 50 ns. The target's total area is 10,000 cm/sup 2/, which allows the use of large amounts of investigated materials (up to 100 g). The detector is used as a low-background counter of alpha particles. Its background is <3 X 10/sup -4/ count/cm/sup 2/ X s at a neutron flux of >10/sup 6/ n/cm/sup 2/ X s. For an integral neutron flux of about 10/sup 12/ n/cm/sup 2/, stable operation of the detector was obtained.
Research Organization:
Joint Institute for Nuclear Research, Laboratory of Neutron Physics H.P.O. Box 79, Moscow
OSTI ID:
7058796
Journal Information:
Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 59:3; ISSN NUTYB
Country of Publication:
United States
Language:
English