Transient and quasi-stationary dissipative effects in the fission flux across the barrier in 1 A GeV 238U on deuterium reactions

Abstract

Isotopic cross sections of all projectile residues with Z above 23 produced in collisions induced by 238U at 1 A GeV on deuterium have been measured. The isotopic distributions reflect the role of evaporation and fission in the formation process of these nuclei. The comparison of the measured cross sections with Monte-Carlo de-excitation codes including an analytical description of the dynamics of fission shows the sensitivity of the data to nuclear dissipation. Moreover, the large excitation-energy range covered in this experiment together with the high accuracy of the measured cross sections allowed to clearly separate and quantify the role of transient and quasi-stationary dissipative effects in the fission-decay width.

arXiv comment9 pages, 5 figures

References in corpus (10)

• Fission-Residues Produced in the Spallation Reaction 238U+p at 1 A GeV
• Measurement of nuclide cross-sections of spallation residues in 1 A GeV 238U + proton collisions
• Transient effects in fission evidenced from new experimental signatures
• Light Nuclides Produced in the Proton-Induced Spallation of 238U at 1 GeV
• Production of Neutron-rich Heavy Residues and the Freeze-out Temperature in the Fragmentation of Relativistic 238U Projectiles Determined by the Isospin Thermometer
• Time evolution of the fission-decay width under the influence of dissipation
• A critical analysis of the modelling of dissipation in fission
• Quantum effect in the diffusion along a potential barrier: Comments on the synthesis of superheavy elements
• Manifestation of transient effects in fission induced by relativistic heavy-ion collisions
• Simulating Quantum Dissipation in Many-Body Systems

Cited by in corpus (3)

• Fragmentation of spherical radioactive heavy nuclei as a novel probe of transient effects in fission
• Production of medium-mass neutron-rich nuclei in reactions induced by 136Xe projectiles at 1 A GeV on a beryllium target
• Comprehensive investigation of fission yields by using spallation- and (p,2p)-induced fission reactions in inverse kinematics