Measurement of a Complete Set of Nuclides, Cross Sections, and Kinetic Energies in Spallation of 238U 1A GeV with Protons

P. Armbruster (1) , J. Benlliure (1) , M. Bernas (2) , A. Boudard (3) , E. Casarejos , S. Czajkowski (4) , T. Enqvist (1) , S. Leray (3) , P. Napolitani (1, 2) , J. Pereira , F. Rejmund (1, 2) , M.-V. Ricciardi (1) , K.-H. Schmidt (1) , C. Stéphan (2) , J. Taieb (1, 2) , L. Tassan-Got (2) , C. Volant (3)

1 GSI - Helmholtz zentrum für Schwerionenforschung GmbH
2 IPNO - Institut de Physique Nucléaire d'Orsay
3 DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée
4 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

Spallation residues and fission fragments from 1A238 GeV U projectiles irradiating a liquid hydrogen target were investigated by using the fragment separator at GSI for magnetic selection of reaction products including ray-tracing, energy-loss and time-of-flight techniques. The longitudinal-momentum spectra of identified fragments were analyzed, and evaporation residues and fission fragments could be separated. For 1385 nuclides, production cross sections down to values of 10 µb with a mean accuracy of 15%, velocities in the uranium rest frame and kinetic energies were determined. In the reaction all elements from uranium to nitrogen were found, each with a large number of isotopes

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

P. Armbruster, J. Benlliure, M. Bernas, A. Boudard, E. Casarejos, et al.. Measurement of a Complete Set of Nuclides, Cross Sections, and Kinetic Energies in Spallation of 238U 1A GeV with Protons. Physical Review Letters, 2004, 93, pp.212701-4. ⟨10.1103/PhysRevLett.93.212701⟩. ⟨in2p3-00023691⟩