Abstract
α-induced reactions on the target element Mn were investigated from 7 to 60 MeV, using the stacked-foil activation technique and the Ge(Li) γ-ray spectroscopy method. Six excitation functions for the reaction residues 58Co, 57Co, 56Co, 55Co, 54Mn, and 52gMn were measured, of which 55Mn (α,α3n) 52gMn was measured for the first time. The experimental data were compared with calculations considering equilibrium as well as preequilibrium reactions according to the geometry-dependent hybrid model of Blann (see Phys. Rev. Lett. 27, 337 (1971); 27, 700E (1971); 27, 1550E (1971)). The initial exciton number, n0 = 4, with different configurations was tested. It was found that the configuration (2n + 2p + oh) appears to give a good fit to the experimental data.
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