Elsevier

Nuclear Physics A

Volume 275, Issue 1, 4 January 1977, Pages 100-110
Nuclear Physics A

Study of elastic and inelastic scattering of protons from 74Ge at isobaric analogue resonances

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Abstract

Excitation functions of the elastic and the inelastic proton scattering leading to the ground state and to the 2+ (0.596 MeV) state in 74Ge were measured at 90°, 125°, 140° and 165° at bombarding energies from 3.34 to 5.4 MeV. Ten isobaric analogue resonances in 75As were identified. Five of these resonances decay to the 2+ excited state in 74Ge. Angular distributions of the inelastically scattered protons were measured at bombarding energies corresponding to these resonances. The partial widths of the isobaric analogue states for decay to the ground state and to the 2+ excited state in 74Ge were determined as well as the l-values of the captured protons and the spins of the resonances. The Coulomb displacement energy for the pair 75As-75Ge was found to be 10.01 MeV. A comparison is made with the parent analogue states in 75Ge. The results indicate that several levels of 75Ge may be described as having a large component of a single particle state coupled to the first 2+ excited state in 74Ge, and that the 2+ state has a configuration with a large 2p-2h component.

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Work supported in part by the Israel Academy of Sciencies and Humanities.

††

Deceased

†††

Present address: Department Of Physics, Ben Gurion University, Beer-Sheva Israel.

Present address: Nuclear Chemistry Department, Soreq Nuclear Research Center, Yavne, Israel.

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