Cross sections for proton induced reactions on 41K and for the reaction 62Ni(α,p)65Cu

Excitation functions have been measured for 62Ni(α,p)65Cu in the energy range 6.5-9.0 MeV, for 41K(p,α)38Ar in the range 0.8-2.6 MeV, for 41K(p,γ)42Ca, 41K(p,αγ)38Ar, 41K(p,nγ)41Ca, and 41K(p,p'γ)41K in the range 0.6-4.0 MeV, and for 41K(p,n)41Ca from threshold to 3.0 MeV. Cross sections have been extracted from the data and these are compared with statistical-model calculations based on global optical model parameters. Alternative parameter sets have been tried for the 62Ni(α,p)65Cu data and published data for 62Ni(α,γ)66Zn and 62Ni(α,n)65Zn, and both these and the global parameters have been used in statistical-model calculations of 65Cu(p,γ)66Zn, 65Cu(p,n)65Zn and 65Cu(p,α)62Ni cross sections, which are compared with published data for the reactions. Both the global and the alternative parameters lead to very good agreement with experiment for all six reactions. Alternative parameters have been tried for the 41K+p reactions also. The global parameters lead to agreement to within afaktor of 2 and the alternative parameters lead to agreement to within a factor of 1.3. The 41K+p alternative parameters are used in calculations of 41Ca(n,γ)42Ca, 41Ca(n,p)41K and 41Ca(n,α)38Ar cross sections, and these and the experimental 41K+p data are used in calculations of thermonuclear reaction rates under stellar conditions for the 41Ca+n and 41K+p reactions. (orig.)