Particle Emission in Heavy-Ion Reactions
- 25 January 1965
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 137 (2B), B332-B345
- https://doi.org/10.1103/PhysRev.137.B332
Abstract
Light charged particles produced at 0 deg in the interaction of 167-MeV ions with Al, Ni, Ag, and Au thick targets have been analyzed magnetically with nuclear-emulsion detectors. The spectra obtained are compared with extensive statistical-model calculations, which include both the effects of angular momentum and of multiple particle emission. The spectra from light targets are seen to be sensitive to the equilibrium shape of the compound nucleus, since rotational effects that depend on this shape are large for these nuclei. For on Au the de-excitation of the compound nucleus is found to be dominated by neutron emission, and a comparison of the calculations with neutron spectra seems to show that the nucleus fissions with highest probability after about 5±1 stages of neutron emission. Owing to the increased competition of neutron emission, charged-particle evaporation for the heavier elements decreases so much that the observed spectra are dominated by direct reaction products. These products, particularly the Li isotopes, are seen to arise from a breakup of the incident , and the energetics of this process are considered.
Keywords
This publication has 17 references indexed in Scilit:
- Compound Statistical Features in Nuclear ReactionsAnnual Review of Nuclear Science, 1962
- Momentum Transfer in Heavy-Ion-Induced FissionPhysical Review B, 1962
- Analysis of recent measurement of nuclear level density parametersNuclear Physics, 1961
- Liquid-Drop Nuclear Model with High Angular MomentumPhysical Review B, 1961
- Monte Carlo Calculations of Nuclear Evaporation Processes. IV. Spectra of Neutrons and Charged Particles from Nuclear ReactionsPhysical Review B, 1960
- Nuclear and Nucleon Scattering of High-Energy ElectronsAnnual Review of Nuclear Science, 1957
- Theory of Nuclear Level DensityPhysical Review B, 1954
- Nuclear Constitution and the Interpretation of Fission PhenomenaPhysical Review B, 1953
- Nuclear Physics B. Nuclear Dynamics, TheoreticalReviews of Modern Physics, 1937
- Neutron Capture and Nuclear ConstitutionNature, 1936