Activation Cross-Section Survey of Deuteron-Induced Reactions
- 15 March 1963
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 129 (6), 2636-2642
- https://doi.org/10.1103/PhysRev.129.2636
Abstract
A survey was made of activation cross sections for various nuclear reactions induced by 20-MeV deuterons. The () and () cross sections increase monotonically with increasing mass number, and in one case () the absolute () cross section is closely predicted by a distorted-wave Born approximation calculation. They are undoubtedly stripping and pickup reactions with little or no compound nucleus contribution. The fact that Coulomb barriers do not affect () cross sections indicates that the pickup occurs far outside the nucleus. The cross sections for () reactions are consistent with a model wherein the second proton is "evaporated" from a compound nucleus, but the level density parameters needed to fit this theory are somewhat lower than expected; this may indicate a contribution from a mechanism in which both protons are emitted in a direct interaction. Excluding the lightest element studied, , the activation cross sections are consistent with calculations assuming a reaction path that is predominantly () with evaporation of the second particle (i.e., one alpha) from a compound nucleus; however the reaction on seems to proceed by the path () with both particles being evaporated. Cross sections for () and () reactions in the mass range 60 to 90 indicate that many more low-energy neutrons than low-energy protons are emitted as first particles in deuteron-induced reactions; this indicates that compound nucleus formation is more important than stripping in these reactions.
Keywords
This publication has 13 references indexed in Scilit:
- Location of Single-Particle Levels in Medium Mass NucleiPhysical Review B, 1962
- Low-Resolution Survey of () Reactions in Heavy NucleiPhysical Review B, 1962
- Lipuid-Liquid Extraction of Vanadium(V) with Tributyl PhosphateAnalytical Chemistry, 1961
- Radiochemical Determination of Molybdenum by Solvent ExtractionAnalytical Chemistry, 1961
- The elastic scattering of 19.5 MeV deuterons by kryptonNuclear Physics, 1961
- Preparation of Thin Targets from PowdersReview of Scientific Instruments, 1960
- Excitation Function for theAl27(d, αp)Na24Reaction Between 0 and 28.1 MevPhysical Review B, 1959
- Excitation Functions of Bismuth and LeadPhysical Review B, 1959
- Anomaly in Energy Level Density MeasurementsPhysical Review B, 1956
- Cross Sections for the Formation of the Compound Nucleus by Charged ParticlesPhysical Review B, 1953