Clustering and Correlations at the Neutron Dripline

Abstract

Some recent experimental studies of clustering and correlations within very neutron-rich light nuclei are reviewed. In particular, the development of the novel probes of neutron-neutron interferometry and Dalitz-plot analyses is presented through the example of the dissociation of the two-neutron halo system ${}^{14}$Be. The utility of high-energy proton radiative capture is illustrated using a study of the ${}^6$He(p,$\gamma$) reaction. A new approach to the production and detection of bound neutron clusters is also described, and the observation of events with the characteristics expected for tetraneutrons (${}^4$n) liberated in the breakup of ${}^{14}$Be is discussed. The prospects for future work, including systems beyond the neutron dripline, are briefly outlined.

Invited contribution to a topical issue on Exotic Nuclei of Les Comptes Rendus de l'Academie des Sciences Paris, Serie IV. 29 pages,11 figures (format RevTex preprint)