First experiment on fission transients in highly fissile spherical nuclei produced by fragmentation of radioactive beams

Abstract

We report on a novel experimental approach for studying the dissipative spreading of collective motion in a meta-stable nuclear system, using, for the first time, highly fissile nuclei with spherical shape. This was achieved by fragmentation of 45 radioactive heavy-ion beams at GSI, Darmstadt. The use of inverse kinematics and a dedicated experimental set-up allowed for the identification in atomic number of both fission fragments. From the width of their charge distributions, a transient time of (3.3 +/- 0.7) 10-21 s is deduced for initially spherical nuclei.

7 pages, 4 figures, background information at http://www-win.gsi.de/charms/

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Cited by in corpus (6)

• Fission Decay Widths for Heavy-Ion Fusion-Fission Reactions
• Fragmentation of spherical radioactive heavy nuclei as a novel probe of transient effects in fission
• Thermal decay rate of a metastable state with two degrees of freedom: dynamical modeling versus approximate analytical formula
• A dynamical model calculation to reconcile the nuclear fission lifetime from different measurement techniques
• Simple description of the temperature dependencies of the width of fission-fragment mass yield in 197Au and 209Bi at intermediate energies
• Investigating the fission dynamics of the following neutron shell closed nuclei within a stochastic dynamical approach: 210Po, 212Rn, and 213Fr