Determination of the Spectroscopic Quadrupole Moment of 40Ar
Loading...
Date
2019
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Zululand
Abstract
Coulomb excitation reorientation e ects measurement was performed at the
AFRODITE vault of iThemba LABS to determine the Qs(2+1 ) of 40Ar. A
beam of 40Ar at a laboratory energy of 134.94 MeV was Coulomb excited
on a 194Pt target at a safe distance between nuclear surfaces of 6.5 fm. The
backward scattered 40Ar particles were detected by an S3-CD double sided
silicon detector at a distance of 30 mm with an angular range of 130 to
159 . Eight HPGe clover detector array ( ve at 90 and three at 135 to the
beam axis) was employed to detect the de-excited
-ray energy emitted by
the 40Ar particles. The 40Ar particles and their corresponding
-rays were
collected in coincidence and stored. MTsort MIDAS was used in conjunction
with an o ine sorting code to sort the coincidence data. Coulomb excitation
analytical code, GOSIA, was used to extract the diagonal matrix element,
h2+1 kE2k2+1 i = 0:00(4) eb. From the relation, h2+1 kE2k2+1 i = Qs
0:75793 , the
Qs(2+1 ) was determined as +0:00(3) eb. This result indicates a spherical
shape for 40Ar at the 2+1 state.
Description
A thesis submitted to the Faculty of Science and Agriculture in fulfilment of the requirement for the Master of Science in Physics in the Department of Physics at the University of Zululand, 2019.
Keywords
Spectroscopic Quadrupole Moment, 40Ar