Alpha particle induced reactions on copper and tantalum

Alpha particle induced reactions in the target elements copper and tantalum were studied. The excitation functions of⁶³Cu(α, n) +⁶⁵Cu(α, 3n),⁶⁵Cu(α, 2n),¹⁸¹Ta(α, 2n) and¹⁸¹Ta(α, 4n) were measured up to 75 MeV.Eight new energy point cross-sections were measured for the first time. The experimental results were compared with the predictions of updated hybrid model (ALICE/85/300) as well as with index model using the initial exciton numbern ₀=4 (4poh) and level density parameter,a=A/8. A general agreement was found for all the reactions with both the models.