(n,f)Fission products: >500 233 U 2351 239 Pu decay by a emission or by spontaneous fission 137 Cs and gsR almost always decay by B emission (n,y Parent and daughter are isotope Chemical separation no low ratio activitⅰeS?
(n,f) Fission products: > 500 233U、 235U 、 239Pu decay by α emission or by spontaneous fission I 3 7 Cs and 90Sr almost always decay by β emission (n,γ) Parent and daughter are isotope Chemical separation no low ratio activities ?
Mo n,y Mo Te 52 Te 15 53 n n, y) 14W4W W B 69d s Re 23.7h 75 Re
2.2 Accelerator Production To produce radioisotopes that are proton rich and that generally decay by positron emission (pn)、(p,a)、(d,n)、(d,.2n)、(d,a)、(a,n)、(a,2n) chemical extraction techniques possible Low yields
2.2 Accelerator Production To produce radioisotopes that are proton rich and that generally decay by positron emission (p,n)、(p,α)、(d,n)、(d,2n)、(d,α)、(α,n)、(α,2n) chemical extraction techniques possible Low yields
(n,v):(4C:5730a),(190:2695) Accelerator: 25Mg(p, a)22Na,IC\ IN Nevertheless, is less popular than reactor method Only in the cases High ratio radioactivity chemical extraction possible suitable half lifetime
(n,γ): （14C：5730a），（19O：26.9s） Accelerator: 25Mg(p,α) 22Na ， 11C、 13N… Nevertheless, is less popular than reactor method Only in the cases: High ratio radioactivity chemical extraction possible suitable half lifetime
■ Accelerators Cyclotrons Co-57 Cd-109 Na-22 Pd-103 Ernest Lawrence Commercial Cyclotron F-18 LBNL 1939 2009 O-15 Spallation Sources(GeV) Exotic radioisotopes ISIS. Rutherford Appleton Lab, UK