No abstract

Differential cross sections for the elastic scattering of various hydrogen and helium isotopes have been measured using accelerated particles from the Los Alamos 42-inch cyclotron. The scattering of protons and deuterons from deuterons, tritons, and helium-three particles has been studied over an energy range of 5 to 14 Mev. The elastic scattering of ^10-Mev polarized protons has also been studied. In all cases nuclear emulsions were used as detectors.Proton-deuteron elastic scattering has been measured at 5.6 and 7.85 Mev. A comparison is made to results at nearby energies of both p-D and n-D scattering and to theoretical predictions. The scattering of 10-Mev polarized protons from deuterons has been measured and provides support for calculations using central force approximations.Measurements of p-T and />-He 3 elastic scattering at 6.5 and 8.34 Mev give angular distributions which are quite similar to those for p-D and p-Ke*. An encouraging agreement is found with resonating-group calculations with central-force approximations of the Serber type.Deuteron-deuteron scattering has been measured at 6.0, 8.2, 12.1, and 13.8 Mev. A preliminary theoretical treatment indicates that the process is predominantly hard-sphere scattering with no strong level splitting.Deuteron-triton and deuteron-helium three scattering has been measured over the energy range of 5 to 14 Mev.

No abstract

No abstract

The present status of the T(d,n) He and T(t,2n) 4 He cross sections is reviewed for incident-particle energies below 1 MeV. Parameterixations of the T(d,n) cross section in this energy region are discussed along with predictions from a preliminary, but comprehensive, R-mutrix analysis of reactions in the five-nucleon system at low energies. Tabular values of these predictions are given at energies between 5 keV and 1 MeV.