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

H. Alvarez-Pol (1) , J. Benlliure (1) , E. Casarejos (1) , L. Audouin (2) , D. Cortina-Gil (1) , T. Enqvist (3) , B. Fernandez (1) , A.R. Junghans (4) , B. Jurado (5) , P. Napolitani (2, 3, 6) , J. Pereira (1) , F. Rejmund (7) , K.-H. Schmidt (3) , O. Yordanov (3)

1 USC - Universidade de Santiago de Compostela [Spain]
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
4 University of Washington [Seattle]
5 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan
6 LPCC - Laboratoire de physique corpusculaire de Caen
7 GANIL - Grand Accélérateur National d'Ions Lourds

Neutron-rich lead and bismuth isotopes have been produced by cold-fragmentation reactions induced by 238U projectiles at 1AGeV 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.

Mots clés: Projectile and target fragmentation

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

H. Alvarez-Pol, J. Benlliure, E. Casarejos, L. Audouin, D. Cortina-Gil, et al.. Production cross-sections of neutron-rich Pb and Bi isotopes in the fragmentation of 238U. The Fifth International Conference on Exotic Nuclei and Atomic Masses ENAM'08, Sep 2008, Ryn, Poland. pp.485-488, ⟨10.1140/epja/i2009-10856-8⟩. ⟨in2p3-00412579⟩