Quasielastic Barrier Distributions : Role of Particle Transfer Channels

The barrier distributions extracted from quasielastic excitation functions are analyzed in terms of a semiclassical model that incorporates both the excitation of the surface degrees of freedom and the exchange of neutrons and protons. It is shown that quasielastic cross sections receive sizable contributions from transfer reactions in all measured energy range

Fusion excitation functions and barrier distributions: A semiclassical approach

Fusion cross sections and barrier distributions are discussed and calculated in the framework of a semiclassical approximation for a variety of systems. An overall good description of the data is achieved

Investigating the nucleus-nucleus potential at very short distances

Recent progress in experimental techniques have made possible accurate measurements of fusion cross sections far below the Coulomb barrier, revealing an unexpected behavior of these quantities as a function of the bombarding energy. Besides providing a plausible cause for the observed energy dependence we profit from the nature of this explanation and the high sensitivity of the experimental data to show how one can use these measurements to investigate the radial dependence of the nuclear ion-ion potential at extremely close distances

Evidence for energy dependent interaction in one-particle transfer reactions between heavy ions

Abstract The recently measured proton stripping cross sections in the collision 16 O+ 208 Pb at 793 MeV [M.C. Mermaz et al., Z. Phys. A 326 (1987) 353] is analyzed in the semiclassical approximation. Taking into account an energy dependence in the interaction, consistent with the proton scattering data, an accurate description of the absolute cross sections is obtained

Regular and chaotic regimes in coupled-channel calculations of nuclear scattering processes

The presence of regular and chaotic regimes in nuclear scattering processes has so far been established in the context of simple, schematic reaction models. It has been argued that traces of the underlying classical organization of phase space should also be present in complex quantal calculations performed with state-of-the-art coupled-channel codes. In this paper we show that this is indeed the case and develop concrete guidelines to infer - relying exclusively on features of the quantal results - the regular or chaotic character of the motion

Coupled channels analysis of the 16O + 28Si reaction near the Coulomb barrier

Abstract Good agreement with all the available experimental data on 16 O + 28 Si scattering and fusion in the energy range of E = 21–38 MeV was obtained with a deformed optical potential consistent with calculations based on nuclear structure information

Simple estimates of excitation energy sharing between heavy and light fragments in heavy-ion reactions

Qualitative arguments are used to estiamte the ratio of excitation energies between heavy and light fragments for asymmetric heavy-ion collisions. The value of this quantity is linked to the relative role played by inelastic and transfer degrees of freedom and thereby to an approximate function of the total kinetic energy loss. A numerical analysis that confirms the trends anticipated by the simple arguments is performed for the reactions 56Fe+ 238U and 86Kr+ 208Pb at bombarding energies in the laboratory of 476 and 1565 MeV, respectivelyComisión Asesora de Investigación Científica y Técnica 2868-8

Transfer reactions in the sudden limit of the pairing-rotor model

The transfer of multiple pairs of particles in heavy-ion reactions is studied in the sudden limit of the macroscopic pairing-rotor model

Realistic simulations of the AGATA Demonstrator+PRISMA spectrometer

Abstract The performance of the AGATA Demonstrator Array coupled to the PRISMA magnetic spectrometer has been evaluated consistently by using detailed Monte Carlo simulations of the two devices. Results for the multi-nucleon transfer reaction 48Ca+208Pb at 310 MeV beam energy are presented and discussed in this study. The present results suggest that the Doppler correction capabilities of the AGATA+PRISMA setup will be very close to the intrinsic energy resolution of the germanium detectors