Alpha particles resulting from spectrum

The photoproduction of alpha particles has also been studied in photographic plates by Millar and in cloud chambers by Gaerttner and Yeater. Millar finds that the energy spectrum of the alphas is what one would expect if they were the result of an evaporation process. The photoproduction of tritons has been observed from the bombardment of lead by 320 Mev bremsstrahlung. 

Nuclear reactions resulting in particle emission Some nuclear reactions result in the emission of a particle (proton or alpha) with an energy higher than the primary beam energy so that they can be detected unambiguously in the detector used for RBS analysis. Relatively few reactions are useful for analytical purposes. One example is Li (p,a) He, which occurs when Li is bombarded with 2-3 MeV protons. Two alpha particles are emitted which have energies of 7-8 MeV and can be detected with no interference from the spectrum of backscattered protons. 

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