Limiting temperatures and disappearance of fusionlike residues

Xu, Hong Ming

doi:10.1016/0375-9474(94)90208-9

Cited by 5 publications

(1 citation statement)

References 76 publications

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“…The recent experimental evidence of an unexpectedly weakened nuclear stopping power around the Fermi energy [117], which corroborates earlier theoretical predictions of a nuclear pseudotransparency of heavy-ion reactions at the same energy range [118][119][120], puts forward a scenario where at these energies an interplay of a weakened nuclear mean field and a still insufficient stopping efficiency of nucleon-nucleon collisions is the cause of fusion disappearance [121]. Our recent simulations with the microscopic DYWAN semiclassical transport code [22], in contrast to other dynamical models [122,123], correctly describes the universality of IF excitation function in the energy range of the model applicability, i.e., above 15 A MeV [21]. Moreover, these simulations strongly corroborate that the lack of nuclear stopping power is at the origin of the fusion disappearance.…”

Section: Discussion and Summarysupporting

confidence: 86%

Comprehensive analysis of fusion data well above the barrier

et al. 2014

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International audienceWe 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

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Section: Discussion and Summarysupporting

confidence: 86%

Comprehensive analysis of fusion data well above the barrier

et al. 2014

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Dynamics of binary dissipative collisions at GANIL energies

Hanappe

1998

Nuov Cim A

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Dynamical aspects associated with the binary dissipative collisions induced by heavy ions at intermediate energies are reviewed. A particular attention is paid to the mid-rapidity emission which is proved to enlight the reaction mechanism. Recent experimental data obtained by the INDRA and DEMON Collaborations as well as new Landau-Vlasov calculations are presented. Consequences on the energy dissipation, on the excitation energy sharing between the partners and on the temperature of the equilibrated fragments are discussed. PACS 25.70 -Low and intermediate energy heavy-ion reactions. PACS 25.70.Lm -Strongly damped collisions.

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