Collinear resonance ionization spectroscopy of exotic francium and radium isotopes

Abstract

Two experimental campaigns were performed at the Collinear Resonance Ionization Spectroscopy (CRIS) experiment, located at the ISOLDE radioactive-beam facility. The spectroscopic quadrupole moment of 203Fr was measured. Its magnitude with respect to the other even-N francium isotopes below N = 126 suggests an onset of static deformation. However, calculations of the static and total deformation parameters reveal that it cannot be considered as purely statically deformed. The neutron-rich radium isotopes were investigated. The spectroscopic quadrupole moment of 231Ra was measured and the continuation of increasing quadrupole deformation with neutron number in neutron-rich radium isotopes was further established. Measurements of the changes in mean-square charge radii of 231-233Ra allowed the odd-even staggering parameter to be calculated for 230-232Ra. A normal odd-even staggering which increases in magnitude with neutron number was observed in these isotopes.

Date of Award	1 Aug 2018
Original language	English
Awarding Institution	The University of Manchester
Supervisor	Kieran Flanagan (Supervisor) & Ronald Garcia Ruiz (Supervisor)