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Measurement of isotopic cross sections of spallation residues in 800 A MeV 197Au+p collisions

✍ Scribed by F. Rejmund; B. Mustapha; P. Armbruster; J. Benlliure; M. Bernas; A. Boudard; J.P. Dufour; T. Enqvist; R. Legrain; S. Leray; K.-H. Schmidt; C. Stéphan; J. Taieb; L. Tassan-Got; C. Volant

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 319 KB
Volume: 683
Category: Article
ISSN: 0375-9474
DOI: 10.1016/s0375-9474(00)00468-1

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✦ Synopsis

The spallation of 197 Au by 800 MeV protons was investigated in inverse kinematics at GSI, Darmstadt, by use of a 197 Au beam bombarding a liquid-hydrogen target. The fragment separator (FRS) was used to select and identify the reaction products prior to β decay. The individual production cross sections and the kinematic properties of 380 isotopes for all elements between mercury (Z = 80) and neodymium (Z = 60) have been measured. A comparison with a Monte-Carlo calculation based on the two-step model of the spallation reaction is given. The isotopic cross-section distribution of iridium isotopes is compared to that resulting from the aluminiuminduced fragmentation of 197 Au. The mean kinetic energies of the fragments are deduced from the experimental data. The importance of the new data to improve our understanding of the spallation mechanism is discussed.

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