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Titolo: Transition state rates and mass asymmetric fission barkers of compound nuclei Mo90,Mo94,Mo98
Autore: Jing, KX; Moretto, LG; Veeck, AC; Colonna, N; Lhenry, I; Tso, K; Hanold, K; Skulski, W; Sui, Q; Wozniak, GJ;
 Indirizzi:
 Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA Lawrence Berkeley Lab Berkeley CA USA 94720 l Sci, Berkeley, CA 94720 USA
 Titolo Testata:
 NUCLEAR PHYSICS A
fascicolo: 2,
volume: 645,
anno: 1999,
pagine: 203  238
 SICI:
 03759474(19990111)645:2<203:TSRAMA>2.0.ZU;2Q
 Fonte:
 ISI
 Lingua:
 ENG
 Soggetto:
 COMPLEXFRAGMENT EMISSION; NEUTRON EMISSION; TIME SCALES; EXCITATIONFUNCTIONS; PARTICLEEMISSION; DIFFUSION PROCESS; BARRIERS; ENERGY; SYSTEMATICS; DETECTORS;
 Keywords:
 nuclear reactions C12(Kr78,Kr82,Kr86,X); E = 613 MeV/nucleon; measured sigma(Z) versus E; deduced mass asymmetric fission barriers for Mo90,Mo94,Mo98; transition state fission rates;
 Tipo documento:
 Article
 Natura:
 Periodico
 Settore Disciplinare:
 Physical, Chemical & Earth Sciences
 Citazioni:
 69
 Recensione:
 Indirizzi per estratti:
 Indirizzo: Jing, KX Lawrence Berkeley Lab, Div Nucl Sci, Berkeley, CA 94720 USA Lawrence Berkeley Lab Berkeley CA USA 94720 rkeley, CA 94720 USA



 Citazione:
 K.X. Jing et al., "Transition state rates and mass asymmetric fission barkers of compound nuclei Mo90,Mo94,Mo98", NUCL PHYS A, 645(2), 1999, pp. 203238
Abstract
Excitation functions were measured for complex fragments with atomic number Z = 525 emitted from the compound nuclei Mo90,Mo94,Mo98 produced in the reactions Kr78,Kr82,Kr86 + C12. Massasymmetric fission barriers were extracted by fitting the excitation functions with a transition state formalism. The extracted barriers are several MeV higher on average than the calculations of the Rotating FiniteRange Model and substantially lower thanpredicted by the Rotating Liquid Drop Model. The symmetric fission barriers measured support the hypothesis of a congruence term that doubles for thefission of strongly indented saddlepoint shapes. The excitation functionswere analyzed to search for atomic number Z and energy Edependent deviations from transitionstatemethod predictions. All of the measured excitation functions can be scaled onto a single universal straight line according to the transitionstate predictions. No Z and/or Edependent effects that could be attributed to transient effects are visible. (C) 1999 Elsevier Science B.V.
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Documento generato il 05/12/20 alle ore 04:14:03