Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Transition state rates and mass asymmetric fission barkers of compound nuclei Mo-90,Mo-94,Mo-98
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:
0375-9474(19990111)645:2<203:TSRAMA>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPLEX-FRAGMENT EMISSION; NEUTRON EMISSION; TIME SCALES; EXCITATION-FUNCTIONS; PARTICLE-EMISSION; DIFFUSION PROCESS; BARRIERS; ENERGY; SYSTEMATICS; DETECTORS;
Keywords:
nuclear reactions C-12(Kr-78,Kr-82,Kr-86,X); E = 6-13 MeV/nucleon; measured sigma(Z) versus E; deduced mass asymmetric fission barriers for Mo-90,Mo-94,Mo-98; 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 Mo-90,Mo-94,Mo-98", NUCL PHYS A, 645(2), 1999, pp. 203-238

Abstract

Excitation functions were measured for complex fragments with atomic number Z = 5-25 emitted from the compound nuclei Mo-90,Mo-94,Mo-98 produced in the reactions Kr-78,Kr-82,Kr-86 + C-12. Mass-asymmetric 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 Finite-Range 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 saddle-point shapes. The excitation functionswere analyzed to search for atomic number Z- and energy E-dependent deviations from transition-state-method predictions. All of the measured excitation functions can be scaled onto a single universal straight line according to the transition-state predictions. No Z- and/or E-dependent effects that could be attributed to transient effects are visible. (C) 1999 Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 04:14:03