Fission time measurements: a new probe into superheavy element stability

Reaction mechanism analyses performed with a 4pi 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 com...

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Bibliographic Details
Published in:Physical review letters 2008-08, Vol.101 (7), p.072701-072701, Article 072701
Main Authors: Morjean, M, Jacquet, D, Charvet, J L, L'Hoir, A, Laget, M, Parlog, M, Chbihi, A, Chevallier, M, Cohen, C, Dauvergne, D, Dayras, R, Drouart, A, Escano-Rodriguez, C, Frankland, J D, Kirsch, R, Lautesse, P, Nalpas, L, Ray, C, Schmitt, C, Stodel, C, Tassan-Got, L, Testa, E, Volant, C
Format: Article
Language:English
Subjects:
COMPOUND NUCLEI
FISSION
FOUR-PI DETECTORS
GERMANIUM
LEAD 208
LIFETIME
NEUTRON-DEFICIENT ISOTOPES
NICKEL
NUCLEAR PHYSICS AND RADIATION PHYSICS
REACTION KINETICS
TIME MEASUREMENT
URANIUM 238
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Summary:Reaction mechanism analyses performed with a 4pi 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.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.101.072701