Photonuclear reaction yields from59Co at 35 MeV and 54 MeV
From measurements of gamma ray activities, induced by irradiating59Co with 35 and 54 MeV bremsstrahlung, the yields of the reactions (γ, 2n), (γ, 3n), (γ, 4n and (γ, ϰ)56Mn relative to the yield of the reaction (γ, n) were determined. At both these energies the same value of 0.57±0.02 was measured for the isomeric yield ratioYm/(Ym+ Yg) of58Co. Absolute yields were obtained by reference to cross section data for the12C (γ, n) process. At high excitation energies only the reaction (γ, 2n) was found to contribute appreciably to the photodisintegration of59Co.