2. 1 Nuclear Reactor Irradiation Neutron flux: 1010x1013cm-2 s -1 (n,a),(n,p),(n,f),(n,v) (n,a)、(n,p): En high,σSmal, Light nuclides 32S(n, p 2P, Li(n, a H Parent and daughter is different Chemical separation2.1 Nuclear Reactor Irradiation Neutron flux: 1010~1013cm-2·s-1 ， (n,α), (n,p), (n,f), (n,γ) (n,α)、(n,p): En High, σ Small，Light nuclides 32S(n,p) 32P, 6Li(n,α) 3H 。 Parent and daughter is different Chemical separation