Angela D. Davies

Structure of 52,54Ti and shell closures in neutron-rich nuclei above 48Ca

Abstract The level structure of 5422Ti32 has been explored for the first time by combining β-decay measurements from fragmentation products with prompt γ-ray spectroscopy following deep inelastic reactions. The latter technique was also instrumental in tracing 52Ti30 to higher spin. The data provide new tests of effective interactions for full pf-shell calculations in neutron-rich nuclei above 48Ca. The data indicate the presence of a significant subshell gap at N=32 and comparisons between theory and experiment suggest an additional shell closure at N=34 in Ca and Ti isotopes.

Two-neutron knockout from neutron-deficient Ar-34, S-30, and Si-26

Department of Physics, School of Electronics and Physical Sciences,University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom(Dated: February 8, 2008)Two-neutron knockout reactions from nuclei in the proximity of the proton dripline have beenstudied using intermediate-energy beams of neutron-deficient

Beta decay studies of nuclei near 32Mg: Investigating the ν(f7/2)-(d3/2) inversion at the N = 20 shell closure

Abstract 32 Mg lies within a region of deformed nuclei commonly referred to as the “island of inversion”. The β decay of 33 Al and 33 Mg has been studied to learn about nuclear structure near 32 Mg. Decay curves and precise half-life measurements are presented for both species. Gamma-ray spectra from correlated 33 Al decay events are also presented. The β -decay properties of 33 Al are shown to be well-described by an sd shell model calculation, suggesting that the ground state of 33 Al lies primarily outside the island of inversion.

Probing Shell Structure and Shape Changes in Neutron-Rich Sulfur Isotopes through Transient-Field g-Factor Measurements on Fast Radioactive Beams of 38S and 40S

The shell structure underlying shape changes in neutron-rich nuclei near N = 28 has been investigated by a novel application of the transient-field technique to measure the first-excited-state g factors in 38S and 40S produced as fast radioactive beams. There is a fine balance between proton and neutron contributions to the magnetic moments in both nuclei. The g factor of deformed 40S does not resemble that of a conventional collective nucleus because spin contributions are more important than usual.

Intermediate Energy Coulomb Excitation as a Probe of Nuclear Structure at Radioactive Beam Facilities

The effects of retardation in the Coulomb excitation of radioactive nuclei in intermediate energy collisions

Shell structure underlying the evolution of quadrupole collectivity in 38 S and 40 S probed by transient-field g-factor measurements on fast radioactive beams

({E}_{\mathrm{lab}}\ensuremath{\sim}100\phantom{\rule{0.3em}{0ex}}\text{MeV}∕\text{nucleon})

Half-life and spin of {sup 60}Mn{sup g}

are investigated. We show that the excitation cross sections of low-lying states in

Ground state magnetic dipole moment of {sup 35}K

^{11}\mathrm{Be}

Population of bound excited states in intermediate-energy fragmentation reactions

,

Nuclear magnetic moment of the Cu57 ground state

^{38,40,42}\mathrm{S}