Production cross-sections of neutron-rich Pb and Bi isotopes in the fragmentation of 238U

CUPP project P.O. Box 22 FIN-8680 Pyhäsalmi Finland; University of Liverpool Oliver Lodge Lab., Oxford street Liverpool L69 7ZE UK; Forschungszentrum Rossendorf Postfach 510119 01314 Dresden Germany; LPC Caen, ENSICAEN, Universitè de Caen, CNRS/IN2P3 F-14050 Caen Cedex 4 France; NSCL, Michigan State University East Lansing MI 48824 USA; INRNE 72 Tzarigradsko chausee BG-1784 Soa Bulgaria
European Physical Journal A (Impact Factor: 2.04). 12/2009; 42(3):485-488. DOI: 10.1140/epja/i2009-10856-8

ABSTRACT Neutron-rich lead and bismuth isotopes have been produced by cold-fragmentation reactions induced by 238U projectiles at 1A GeV impinging on a beryllium target. The high-resolving power FRagment Separator (FRS) at GSI allowed
us to identify and determine the production cross-sections of 43 nuclei, nine of them for the first time ( 216, 217, 218, 219Pb and 219, 220, 221, 222, 223Bi . These data are compared to other previously measured cross-sections in similar reactions and model calculations.