Phys. Rev. Lett. 99, 042701 (2007) [4 pages]First Experiment on Fission Transients in Highly Fissile Spherical Nuclei Produced by Fragmentation of Radioactive BeamsReceived 19 February 2007; published 25 July 2007 We report on a novel experimental approach for studying the dissipative spreading of collective motion in a metastable 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 setup allowed for the identification in atomic number of both fission fragments. From the width of their nuclear-charge distributions, a transient time of (3.3±0.7)×10-21 s is deduced for initially spherical nuclei. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.042701
DOI:
10.1103/PhysRevLett.99.042701
PACS:
24.75.+i, 24.10.−i, 25.70.Mn, 25.75.−q
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