Discriminant Analysis and Secondary-Beam Charge Recognition
Abstract
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.
Cite
@article{arxiv.0707.0598,
title = {Discriminant Analysis and Secondary-Beam Charge Recognition},
author = {J. Lukasik and P. Adrich and T. Aumann and C. O. Bacri and T. Barczyk and R. Bassini and S. Bianchin and C. Boiano and A. S. Botvina and A. Boudard and J. Brzychczyk and A. Chbihi and J. Cibor and B. Czech and J. -E. Ducret and H. Emling and J. Frankland and M. Hellstroem and D. Henzlova and G. Imme and I. Iori and H. Johansson and K. Kezzar and A. Lafriakh and A. Le Fevre and E. Le Gentil and Y. Leifels and J. Luehning and W. G. Lynch and U. Lynen and Z. Majka and M. Mocko and W. F. J. Mueller and A. Mykulyak and M. De Napoli and H. Orth and A. N. Otte and R. Palit and P. Pawlowski and A. Pullia and G. Raciti and E. Rapisarda and H. Sann and C. Schwarz and C. Sfienti and H. Simon and K. Summerer and W. Trautmann and M. B. Tsang and G. Verde and C. Volant and M. Wallace and H. Weick and J. Wiechula and A. Wieloch and B. Zwieglinski},
journal= {arXiv preprint arXiv:0707.0598},
year = {2009}
}
Comments
6 pages, 7 eps figures, elsart, submitted to Nucl. Instr. and Meth. A