Transient Effects in Fission from New Experimental Signatures

B. Jurado, C. Schmitt, K.-H. Schmidt, J. Benlliure, T. Enqvist, A. R. Junghans, A. Kelić, and F. Rejmund

Phys. Rev. Lett. 93, 072501 – Published 12 August 2004

Abstract

A new experimental approach is introduced to investigate the relaxation of the nuclear deformation degrees of freedom. Highly excited fissioning systems with compact shapes and low angular momenta are produced in peripheral relativistic heavy-ion collisions. Both fission fragments are identified in atomic number. Fission cross sections and fission-fragment element distributions are determined as a function of the fissioning element. From the comparison of these new observables with a nuclear-reaction code a value for the transient time is deduced.

Received 14 January 2004

DOI:https://doi.org/10.1103/PhysRevLett.93.072501

Authors & Affiliations

B. Jurado^1,*, C. Schmitt¹, K.-H. Schmidt¹, J. Benlliure², T. Enqvist^1,†, A. R. Junghans³, A. Kelić¹, and F. Rejmund^1,*

¹GSI, Planckstraße 1, 64291 Darmstadt, Germany
²Facultad de Fisica, Univ. de Santiago de Compostela, 15706 S. de Compostela, Spain
³Forschungszentrum Rossendorf, Postfach 510119, 01314 Dresden, Germany

^*Present address: GANIL, Blvd. H. Becquerel, B.P. 5027, 14076 Caen, France.
^†Present address: CUPP project, P.O. Box 22, 86801 Pyhäsalmi, Finland.

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Vol. 93, Iss. 7 — 13 August 2004

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