Eur. Phys. J. A 15, 213-215 (2002)
DOI: 10.1140/epja/i2001-10257-1

Fission studies with relativistic beams

K.-H. Schmidt¹, P. Armbruster¹, J. Benlliure², C. Böckstiegel³, H.-G. Clerc³, T. Enqvist⁴, A. Grewe³, A. Heinz¹, A. Junghans¹, J. Müller³, F. Rejmund⁵ and S. Steinhäuser<sup>3

1</sup>  GSI, Planckstr. 1, 64291 Darmstadt, Germany
²  University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
³  IKDA, TU Darmstadt, Schloßgartenstr. 9, 64289 Darmstadt, Germany
⁴  University of Jyväskylä, 40351 Jyväskylä, Finland
⁵  IPN Orsay, IN2P3, 91406 Orsay, France

k.h.schmidt@gsi.de

(Received: 21 March 2002 / Published online: 31 October 2002)

Abstract
We report on an experimental programme to measure the nuclide production in fission in inverse kinematics. Using relativistic beams of primordial and radioactive nuclei, new experimental information on the influence of shell effects on fission has been obtained. The transition from symmetric to asymmetric fission around ²²⁷Th has systematically been mapped. The heavy asymmetric component was found to be astonishingly stable near Z = 54 for all systems investigated.

PACS
25.85.-w - Fission reactions.
25.70.-z - Low and intermediate energy heavy-ion reactions.

© Società Italiana di Fisica, Springer-Verlag 2002