Speaker
Dr
Franck Delaunay
(LPC Caen, France)
Description
Beta-decay spectroscopy is one of the most important tools for the study of nuclear structure. In exotic nuclei beta-decay can often be followed by the emission of delayed particles, a process which becomes the dominant decay channel when approaching the driplines. In the most exotic species, the emission of two or more delayed particles can also occur with a significant probability.
Whereas two delayed proton spectroscopy has been performed in a number of cases, no spectroscopic study of two delayed neutron emission, with measurement of the neutron energies and angles, has been undertaken.
We performed an experiment at ISOLDE in October 2014 to detect for the first time in coincidence two delayed neutrons from the decay of 11Li and measure their energies and angles, in order to study the sequential or direct character of the emission and the possible correlations between the neutrons.
This experiment used an array of liquid scintillator modules coupled to a digital electronics and signal processing system for the detection of neutrons. The use of liquid scintillator allows to perform neutron-gamma discrimination to suppress random coincidences involving background.
This talk will present the aim of this experiment, the analysis techniques and the status of the data analysis.
Author
Dr
Franck Delaunay
(LPC Caen, France)
