63^rd ANNUAL CONFERENCE OF THE SA INSTITUTE OF PHYSICS

Structure of ³³ Si, ³⁵ S and ³⁶ S nuclei and the N=20 shell gap

28 Jun 2018, 11:40

20m

Oral Presentation Track B - Nuclear, Particle and Radiation Physics Nuclear, Particle and Radiation Physics

Speaker

Ms Sandile Jongile (Stellenbosch/ iThemba LABS)

Description

The project focuses on studying the evolution of the N=20 shell gap. The shell gaps have been previously investigated through studies of nuclear levels, using various experimental approaches namely: Coulomb excitation, knockout reactions, transfer reactions and g-factor measurements. In exotic nuclei with an imbalanced number of neutrons and protons, significant modifications of the nuclear structure have been observed. A detailed study of the evolution of the shell gaps will lead to a comprehensive understanding of the structure of atomic nuclei. In order to investigate the evolving shell structure it is necessary to determine single particle observables such as spectroscopic factors of the states involving the active orbitals at these shells gaps. A knockout reaction is the first set of data for this project, the experiment was performed at MSU/NSCL laboratory using the GRETINA gamma-ray tracking array and S800 spectrometer. The knockout reaction was performed using inverse kinematics with a ³⁶S secondary beam incident on a ⁹Be target. The nuclei of interest studied are ³³Si, ³⁵S and ³⁶S. Various transitions in these nuclei have been identified from the analysis of add-back Doppler corrected spectra and a level scheme has been built from the resulting analysis. In addition parallel momentum distributions have been constructed to investigate the possible nature of the different states. This work is supported by the National Research Foundation of South Africa .

Supervisor details<br><b>If not a student, type N/A.</b><br>Student abstract submision<br>requires supervisor permission:<br>please give their name,<br> institution and email address.

Mathis Wiedeking,
wiedeking@tlabs.ac.za
iThemba LABS