Highly excited alpha-cluster states in 32S studied with the thick-target inverse kinematics method

Excitation functions of elastic 28Si + alphascattering were measured employing the relatively new thick-target inverse kinematics technique, confirming the usefulness of the method. Data were taken at a 28Si beam energy of 150 MeV in a reaction chamber filled with 4He gas, corresponding to the excitation region of 10–24MeV in 32S. Results are compared to earlier studies, in order to validate the method and explore its limitations. The data were treated in the framework of a simplified R-matrix approach. Energies, widths and spin assignments were obtained for 129 resonances in this mid-shell nucleus. The structure is discussed within the concept of alpha-cluster structure in the quasi-continuum of 32S.

Excitation functions of elastic Si-28 + alpha scattering were measured employing the relatively new thick-target inverse kinematics technique, confirming the usefulness of the method. Data were taken at a Si-28 beam energy of 150MeV in a reaction chamber filled with He-4 gas, corresponding to the excitation region of 10-24MeV in S-32. Results are compared to earlier studies, in order to validate the method and explore its limitations. The data were treated in the framework of a simplified R-matrix approach. Energies, widths and spin assignments were obtained for 129 resonances in this mid-shell nucleus. The structure is discussed within the concept of a-cluster structure in the quasi-continuum of S-32.