A thin film 10B sample for measuring the atom number |
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Authors: | ZHANG Jiaguo WU Hao ZHANG Guohui |
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Affiliation: | State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, Peking University, Beo'ing 100871, China |
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Abstract: | In order to measure differential cross sections of the 10B(n,α)7Li reaction induced by MeV neutrons using the forward-backward coincidence method, a thin film 10B sample was designed and the 10B atom number was determined with a reference 10B film sample. Alpha counts of the 10B(nth,α)7Li reaction from the 10B thin film and the reference sample were measured using a gridded ionization chamber and thermal neutrons, which were moderated and thermalized by paraffin from fast neutrons produced in D(d,n)3He reaction on a 4.5 MV Van de Graaff. The neutron flux was normalized by measuring the fission yield of a small 238U fission chamber. |
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Keywords: | 10B thin film sample Reference 10B sample 10B atom number Gridded ionization chamber |
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