Martin Freer

The clustered nucleus—cluster structures in stable and unstable nuclei

The subject of clustering has a lineage which runs throughout the history of nuclear physics. Its attraction is the simplification of the often uncorrelated behaviour of independent particles to organized and coherent quasi-crystalline structures. In this review the ideas behind the development of clustering in light nuclei are investigated, mostly from the stand-point of the harmonic oscillator framework. This allows a unifying description of alpha-conjugate and neutron-rich nuclei, alike. More sophisticated models of clusters are explored, such as antisymmetrized molecular dynamics. A number of contemporary topics in clustering are touched upon; the 3?-cluster state in 12C, nuclear molecules and clustering at the drip-line. Finally, an understanding of the 12C+12C resonances in 24Mg, within the framework of the theoretical ideas developed in the review, is presented.

Structure of Be-12: Intruder d-wave strength at N=8

The breaking of the N=8 shell-model magic number in the 12Be ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than 12Be. The occupancies of the [FORMULA: SEE TEXT]orbital and the [FORMULA: SEE TEXT], intruder orbital were deduced from a measurement of neutron removal from a high-energy 12Be beam leading to bound and unbound states in 11Be.

Two-neutron interferometry as a probe of the nuclear halo

The technique of intensity interferometry is proposed as a probe of the spatial configuration of two-Neutron haloes. After exploring the sensitivity of interferometry to the n-N configuration, it is demonstrated that the application of the standard method for constructing the correlation function is not valid for halo neutrons. A new iterative method is presented and applied to measurements of the dissociation of 6He, 11Li and 14Be. The correlation functions for these systems have thus been extracted for the first time and the corresponding root-Mean-Square n-n separations estimated. The results are in agreement with the predictions of available three-Body models

Three-body correlations in Borromean halo nuclei

Three-body correlations in the dissociation of Borromean halo nuclei are explored for the first time using a technique based on intensity interferometry and Dalitz plots. As an example, the breakup of

A double-sided silicon strip detector system for proton radioactivity studies

^{14}

Neutrons from the breakup of C-19

Be into

Reevaluation of the 22Na(p,gamma) reaction rate: implications for the detection of 22Na gamma rays from novae.

^{12}

First results on double β-decay modes of Cd, Te, and Zn Isotopes

Be+n+n by Pb and C targets is analysed. The combined treatment of n-n and core-n correlations permitted the halo n-n separation to be deduced together with the characteristics

4 He Decay of Excited States in 14 C

(E,\tau)

TIARA: A large solid angle silicon array for direct reaction studies with radioactive beams

of resonances formed in