FE-56(ALPHA,GAMMA)NI-60 REACTION CROSS-SECTION

The yield of 1.332 MeV γ-rays from the reaction 56Fe(α, γ)60Ni has been measured as a function of α-particle bombarding energy in the range 4.2-7.1 MeV. This energy region includes the (α, n) threshold at Eα = 5.46 MeV. The energy dependence of this γ-ray cross section, as well as the (α, nγ) cross section, is compared with statistical model calculations. Good agreement is achieved between these data and calculations using global optical model parameters to determine the transmission functions. In particular, the pronounced threshold effect in the (α, γ) yield, at the opening of the (α, n) channel, is well represented. © 1979.