Abstract
Excitation functions for the (α, p n ), (α, p 2 n ), (α, 3 n ) and (α, α p n ) reactions on Fe 56 and the (α, α p ) reaction on Fe 57 were measured by the activation method using a stacked-foil technique, the alpha-particle energies ranging from 17 to 40 MeV. The measured excitation functions for the alpha-particle reactions on Fe 56 (present work) were compared with those for the proton reactions on Co 59 (Sharp et al.); the compound nucleus Ni 60 being the same for two cases. The comparison gives a test of the validity of compound nucleus theory. The ratios of corresponding cross sections seem to agree well with the theory (except in the case of resulting Co 57 ). However, it may be seen that the two curves corresponding to the same residual nucleus in each case do not entirly coincide in energy.
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