Question

36 i) Estimate the time it will take to produce a 100 Ci a radioactive source 1 Cl by irradiating 1 g of natural nickel chloride (molecular weight 129.6) in a neutron flux of 1014 cm2s1 The cross section of the neutron capture reaction CI (n,y)1C is 43 b and the half-life of 3Cl is long (3x10 years). 75.8% natural clorine consists of 1Cl i1) From ), calculate the fraction of Cl which is transformed if 1 g of nickel chloride is irradiated for 1 day

Answer 1

ywin 100 pci nu pyBduce terme 't af mans mic ku thloud ig M.wt 127-6 neutron lun 10 cr haif life ty3X 10 yand N 0.58 Na -At N- No e 0.58 e Ld2) whuu .31X 10 y Substilutimg above 31X 10 0.158 apply n both das - 2.31X 10 Lnt0758) = 0.274=2.31x 106 t t 119944 5y2yr t 1.1994X 1D yeans Li) t = 1day No if cans A=.31XI0 r day = 313 d. 31XID Y Lyeas 365 fdays year A .328XIO 431ίx0% 1aoy e No N 0.999 No