In this study light elements 30 Si , 33 S for 30 Si(α,n) 33 S reaction as well as α-particle energy from (5.001) MeV to (6.284) MeV are used according to the available data of reaction cross sections with threshold energy (3.959MeV). The more recent cross sections data of 30 Si(α,n) 33 S reaction is reproduced in fine steps in the specified energy range , as well as cross section (α,n) values were derived from the published data of (n,α) as a function of energy in the same fine energy steps by using the principle of inverse reaction . This calculations involves the first exited state of 30 Si , 33 S in the reactions 30 Si(α,n) 33 S and 33 S(n,α) 30 Si . These data are listing , plotted and dissection .
In this study intermediate elements 64 Ni , 64 Cu for 64 Ni (p,n) 64 Cu reaction with proton energy from (1.0) MeV to (132) MeV with threshold energy (2.496) MeV are used according to the available data of reaction cross sections. We calculated the cross sections for 64 Cu(n,p) 64 Ni reaction by application in nuclear technology (reciprocity theory). In reciprocity theory we derive the mathematical formula for 64 Cu(n,p) 64 Ni and we deduced high probability to produced 64 Ni because it is very important such as it used in technology field .The evaluated cross sections as a functions of neutron energy between (E n =0.504MeV) to (E n =129.506MeV) of (0.0106barn) (0.254barn) respectively and statistical factor (g p,n =1 and g n,p =1/3) .
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