Discriminant Analysis and Secondary-Beam Charge Recognition

Details Discriminant Analysis and Secondary-Beam Charge Recognition Discriminant Analysis and Secondary-Beam Charge Recognition

2007-07-04

arxiv.org/abs/0707.0598v1

Physics

Nuclear Physics

Nuclear Experiment

6 pages, 7 eps figures, elsart, submitted to Nucl. Instr. and Meth. A

Scientific paper

10.1016/j.nima.2008.01.071

The discriminant-analysis method has been applied to optimize the exotic-beam charge recognition in a projectile fragmentation experiment. The experiment was carried out at the GSI using the fragment separator (FRS) to produce and select the relativistic secondary beams, and the ALADIN setup to measure their fragmentation products following collisions with Sn target nuclei. The beams of neutron poor isotopes around 124La and 107Sn were selected to study the isospin dependence of the limiting temperature of heavy nuclei by comparing with results for stable 124Sn projectiles. A dedicated detector to measure the projectile charge upstream of the reaction target was not used, and alternative methods had to be developed. The presented method, based on the multivariate discriminant analysis, allowed to increase the efficacy of charge recognition up to about 90%, which was about 20% more than achieved with the simple scalar methods.

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