Comprehensive analysis of fusion data well above the barrier

Abstract : We report on the comprehensive systematics of nearly 400 fusion-evaporation and/or fusion-fission cross-section data for a very large variety of systems over an energy range ∼3A to 155A MeV. Scaled by the reaction cross section and expressed as a function of the center-of-mass energy per nucleon, the fusion cross section displays a universal behavior. Within experimental errors, this behavior does not depend on system mass, mass asymmetry, or system isospin. The deduced homographic functional dependence for complete and summed complete and incomplete fusion excitation functions is derived from basic strong absorption model formulas for reaction cross sections and allows us to draw the main properties of these functions. The limiting energy for the complete fusion and the main characteristics (onset, maximum, and extinction) of the incomplete fusion excitation functions are determined. The complete fusion reaction process disappears around 6.5 MeV/nucleon and the incomplete one disappears at about 13 MeV/nucleon in the center-of-mass frame. The regularity in fusion data is particularly obvious for the evaporation-residue subset of the data ensemble. Adding the fusion-fission data component does not alter the general data trend but somewhat obscures it owing to the larger uncertainty and/or possible normalization problems.
Type de document :
Article dans une revue
Physical Review C, American Physical Society, 2014, 90 (3), pp.034609. 〈10.1103/PhysRevC.90.034609〉
Liste complète des métadonnées

http://hal.in2p3.fr/in2p3-01075269
Contributeur : Dominique Girod <>
Soumis le : vendredi 17 octobre 2014 - 10:12:51
Dernière modification le : vendredi 22 juin 2018 - 09:34:17

Identifiants

Citation

P. Eudes, Z. Basrak, F. Sébille, V. De La Mota, G. Royer. Comprehensive analysis of fusion data well above the barrier. Physical Review C, American Physical Society, 2014, 90 (3), pp.034609. 〈10.1103/PhysRevC.90.034609〉. 〈in2p3-01075269〉

Partager

Métriques

Consultations de la notice

185