Speaker
Ms
Sinegugu Happiness Mthembu
(iThemba LABS)
Description
Gamma-gamma angular correlation measurements are an important tool to determine (i) the spin and parity of a nuclear state (ii) the multipolarity and the multipole mixing ratio of a gamma-ray transition. A segmented clover detector was placed at close geometry and tested it for angular correlation measurements using $^{133}$Ba and $^{60}$Co sources. The segments of the clover were used as individual detectors. This allowed one to determine the angular correlation coefficients, $a_2$ and $a_4$, and to determine the multipole mixing ratios of several gamma-ray transitions. Codes to sort and analyze gamma-gamma angular correlation data were developed and a technique to deduce the multipole mixing ratios was established. The angular correlation technique developed for the iThemba LABS segments clover detector allowed the determination of several multipole mixing ratios with high precision and new results on the signs of the multipole mixing ratios for some transitions in $^{133}$Ba were obtained. The analysis of the $1173 - 1332$ keV cascade in $^{60}$Co showed that using the segmented clover one can easily distinguish a stretched dipole from an unstretched quadrupole transition.
Apply to be<br> considered for a student <br> award (Yes / No)?
Yes
Level for award<br> (Hons, MSc, <br> PhD, N/A)?
MSc
Primary author
Ms
Sinegugu Happiness Mthembu
(iThemba LABS)
Co-authors
Dr
Elena Lawrie
(iThemba LABS)
Mr
Jayson Easton
(iThemba LABS and University of the Western Cape)
Dr
Kobus Lawrie
(iThemba LABS)
Dr
OBED SHIRINDA
(iThemba LABS)
Dr
Sifiso Senzo Ntshangase
(University of Zululand)
Mr
Sive Noncolela
(UWC)
Dr
Thifhelimbilu Daphney Bucher
(iThemba LABS)
Dr
Tshepo Dinoko
(iThemba LABS)
