A thick target containing n nuclei/cm3 is irradiated with alpha particles. The dependence of the differential yield of the reaction under study on the energy of alpha particles in the range 1-10 MeV turned out to be quadratic, i.e. dh/de = kE2. Determine approximately the nature of the dependence of the effective reaction cross section on energy s(E). In this case, in the expression for ionization energy losses, neglect the logarithmic and relativistic terms, i.e. assume that de/dx = A/E, where A is some constant.

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