Collective excitations inS33

Abstract

High spin states of $^{33}\mathrm{S}$ populated through ${}^{27}\mathrm{Al}{(}^{12}\mathrm{C},\ensuremath{\alpha}\mathrm{pn})^{33}\mathrm{S}$ reaction at E$(^{12}\mathrm{C})\phantom{\rule{0.16em}{0ex}}=\phantom{\rule{0.16em}{0ex}}40$ MeV have been studied using the Indian National Gamma Array (INGA) facility. The level scheme was extended and modified utilizing data from the $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coincidence, directional correlation, and linear polarization measurements. Three levels of the negative parity yrast sequence were found to be connected by strong E2 transitions. The lifetimes of these states determined by the Doppler shift attenuation method have been utilized to study the evolution of collectivity with spin. Large basis shell model calculations have been performed to understand the microscopic origin of these levels.