On 1<i>f</i>2<i>p</i>Nuclei. Search for the Particle-Plus-Core Excitation Mode in⁶⁵Ga,⁶⁷Ga and⁶⁹Ga

Abstract

The γ-ray decays of the states in 65Ga*, 67Ga* and 69Ga* were studied using the reactions 64Zn(d,n) at Ed = 7.1 MeV, 64Zn(α,p) and 66Zn(α,p) at Eα = 12.2 and 14.2 MeV, 63,65Cu(α,2n) at Eα = 24 and 31 MeV. By measuring γ-γ and p-γ coincidences, angular distributions and yield of the transitions as a function of incident energies ten states in 65Ga, sixteen states in 67Ga and nine states in 69Ga were established or confirmed. The validity of the particle-plus-vibrational core coupling scheme for 65,67,69Ga is considered in view of these data.