corner
corner
APS » Journals » Phys. Rev. Lett. » Volume 101 » Issue 7
< Previous Article | Next Article >

Phys. Rev. Lett. 101, 072701 (2008) [4 pages]

Fission Time Measurements: A New Probe into Superheavy Element Stability

Download: PDF (306 kB) Buy this article Export: BibTeX or EndNote (RIS)

M. Morjean1,*, D. Jacquet2, J. L. Charvet3, A. L’Hoir4, M. Laget2, M. Parlog1,5, A. Chbihi1, M. Chevallier6, C. Cohen4, D. Dauvergne6, R. Dayras3, A. Drouart3, C. Escano-Rodriguez1, J. D. Frankland1, R. Kirsch6, P. Lautesse6, L. Nalpas3, C. Ray6, C. Schmitt6, C. Stodel1, L. Tassan-Got2, E. Testa6, and C. Volant3
1GANIL, CEA-DSM, and IN2P3-CNRS, B.P. 55027, F-14076 Caen Cedex, France
2IPNO, CNRS/IN2P3, Université Paris-Sud 11, F-91406 Orsay Cedex, France
3CEA-Saclay, IRFU/Service de Physique Nucléaire, F-91191 Gif sur Yvette Cedex, France
4INSP, Université P. et M. Curie-Paris 6, UMR 7588 CNRS, 140 rue de Lourmel, F-75015 Paris, France
5National Institute for Physics and Nuclear Engineering, RO-76900 Bucharest-Magurele, Romania
6IPNL, Université Lyon 1, CNRS/IN2P3, 4 rue E. Fermi, F-69622 Villeurbanne, France

Received 26 February 2008; published 11 August 2008

See accompanying Physics Viewpoint

Reaction mechanism analyses performed with a 4π detector for the systems 208Pb+Ge, 238U+Ni and 238U+Ge, combined with analyses of the associated reaction time distributions, provide us with evidence for nuclei with Z=120 and 124 living longer than 10-18  s and arising from highly excited compound nuclei. By contrast, the neutron deficient nuclei with Z=114 possibly formed in 208Pb+Ge reactions have shorter lifetimes, close to or below the sensitivity limit of the experiment.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.072701
DOI:
10.1103/PhysRevLett.101.072701
PACS:
25.70.Jj, 24.75.+i, 25.70.Lm, 27.90.+b

*morjean@ganil.fr

 
< Previous Article | Next Article >