Investigation of the γ-ray strength function in 64, 66Zn by means of the average resonance method

Abstract

The reactions 63 Cu( p, γ) 64 Zn and 65 Cu( p, γ) 66 Zn have been used to study the average intensities of primary γ-rays from compound nuclear states in a broad energy region just below the neutron binding energy in 64Zn and 66Zn. The γ-rays were detected with a three-crystal pair spectrometer for differences in the proton energies of 16–20 keV. Spectra obtained in this way were added to get one averaged spectrum for each of the two nuclei. Comparison of the relative intensities of the primary γ-ray transitions were made with the predictions of the compound nucleus statistical model. The E1 γ-ray strength functions for energies below 11 MeV have been deduced from the results.