Analysis of the total activation cross section of all possible reactions producing the same radioactive nuclide for the same element

Firstly, according to the regulation of growth and decay of radioactive nuclides produced in reactions, a formula used to calculate the total activation cross section of all possible reactions producing the same radioactive nuclide for the same element is deduced, and it is pointed out that the activation formula given in two references is incorrect. Then, as an example, the so-called total activation cross section in one of the two references is analyzed and the correct results of the cross sections of 182W(n,p) 182(m+g) Ta, 183W(n,p) 183Ta and 206Pb(n, α) 203Hg induced by neutrons around 14 MeV calculated with the data given in the literature,the nuclear parameters and some evaluated values are given. Finally, the correct results are compared with other values collected in the literature. (authors)