Performance of VAMOS for reactions near the Coulomb barrier
نویسندگان
چکیده
VAMOS (VAriable MOde Spectrometer) is a large solid angle ray-tracing spectrometer employing numerical methods for reconstructing the particle trajectory. Complete identification of reaction products has been achieved by trajectory reconstruction. Equipped with a versatile detection system, VAMOS is capable of identifying reaction products from diverse reactions using beams at GANIL. The technique for trajectory reconstruction and its application for identifying reaction products are presented. The angular acceptance of the spectrometer has been studied using Monte Carlo simulation by an ion optics code. The spectrometer was coupled to the high efficiency EXOGAM γ-array to obtain γ-recoil coincidences for studying nuclei far from stability. The main features of the spectrometer as well as some results applied to experiments in deep inelastic collisions are described.
منابع مشابه
- th / 0 40 80 25 v 1 9 A ug 2 00 4 1 FUSION 03 , Concluding Remarks
Fusion reactions below the Coulomb barrier provide new insights into multidimensional quantum tunneling, nuclear reaction dynamics and nuclear structure.1), 2) These reactions are also of considerable interest to nuclear astrophysics. The evolution of main sequence stars, in particular stellar nucleosynthesis is governed by subbarrier fusion.3) It may be worthwhile to review some of the basic a...
متن کاملSemi-classical Characters and Optical Model Description of Heavy Ion Scattering, Direct Reactions, and Fusion at Near-barrier Energies
An approach is proposed to calculate the direct reaction (DR) and fusion probabilities for heavy ion collisions at near-Coulomb-barrier energies as functions of the distance of closest approach D within the framework of the optical model that introduces two types of imaginary potentials, DR and fusion. The probabilities are calculated by using partial DR and fusion cross sections, together with...
متن کاملFusion and Direct Reactions of Halo Nuclei at Energies around the Coulomb Barrier
The present understanding of reaction processes involving light unstable nuclei at energies around the Coulomb barrier is reviewed. The effect of coupling to direct reaction channels on elastic scattering and fusion is investigated, with the focus on halo nuclei, for which such effects are expected to be most important. With the aim of resolving possible ambiguities in the terminology a short l...
متن کاملDynamic Study on Fusion Reactions for Zr around Coulomb Barrier *
By using the updated improved Quantum Molecular Dynamics model in which a surface-symmetry potential term has been introduced for the first time, the excitation functions for fusion reactions of 40,48Ca+90,96Zr at energies around the Coulomb barrier have been studied. The experimental data of the fusion cross sections for 40Ca+90,96Zr have been reproduced remarkably well without introducing any...
متن کاملNear-barrier reactions with radioactive ion beams at the ReA3 facility
The new ReA3 re-accelerated beam facility at the National Superconducting Cyclotron Laboratory (NSCL) will provide high quality radioactive ion beams (RIBs), produced from fast fragmentation reactions, at energies around the Coulomb barrier. These radioactive isotopes can have exotic properties such as neutron/proton skins, halos, or unexpected changes in their shell structure. ReA3 will allow ...
متن کامل