Investigating the strength of the scissors resonance in 151Sm
Date
2022
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Abstract
The isotopic chain of samarium is one of the isotopic chains with a number of stable isotopes. The scissors resonance (SR) of 151Sm was studied with the aim of understanding the evolution of the SR along the Sm isotopic chain. Change in deformation of a nucleus from prolate through spherical to oblate, leads to changes in statistical properties, particularly the -strength function (SF) and nuclear level density (NLD). The evolution of the resonance modes such as the SR depends on the deformation of the isotopes. The experiment was performed at the Oslo Cyclotron laboratory where a 152Sm selfsupporting target was bombarded with a 13.5 MeV deuteron beam. The reaction 152Sm(d,t)151Sm populated the nucleus of interest. An array of Sodium Iodine NaI(Tl) detectors, CACTUS, detected -rays and the silicon particle telescope array, SiRi, was used to detect charged particles in coincidence. The NLD and SF were extracted below the neutron separation energy, Sn, using the Oslo Method.
These results were used to investigate the SR in the 151Sm and the extracted B(M1) was compared to that of previously measured samarium isotopes. This study provides a near complete picture of the evolution of the SR for the Sm isotopic chain.
Description
A dissertation submitted in fulfilment of the requirements for the degree of Master of Science to the Faculty of Science, University of the Witwatersrand, Johannesburg, 2022
Keywords
Scissors resonance (SR), Isotopic chain of samarium