The elastic scattering of protons and deuterons by deuterium
Wilson, Arthur Seymour
Legg, James C.
Master of Arts
The elastic scattering of protons and deuterons by deuterium has been investigated using the Rice University tandem Van de Graaff accelerator and a precision small volume gas scattering chamber. Excitation functions were taken at center-of-mass angles 60 and 90 degrees for laboratory deuteron energies from 4 to 8 MeV; and at center-of-mass angles 90 and 120 degrees for laboratory proton energies from 5 to 11 MeV, Angular distributions were taken for laboratory proton energies of 7,01 and 7,57 MeV, from center-of-mass angles 30 to 135 degrees, Excitation functions were measured in 20 keV steps; angular distributions were measured in 5 degree steps, Differential cross sections were measured with an absolute error of less than 5 percent and a relative error of less than 2 percent for excitation functions; and with an absolute error ofless than 2 percent and a relative error of less than 1.5 percent for angular distributions. The experimental cross sections from the p - d angular distributions were compared with cross sections calculated from the phase shifts of Van Oers and Brockman; agreement is fair at intermediate angles and becomes poor at forward and backward angles, The excitation functions do not exhibit any significant anomalies; therefore no excited states of isospin T = 1/2 in 3He with excitation energy 8.8 to 12,8 MeV or of isospin T = 0 in 4He with excitation energy 25.8 to 27.8 MeV are postulated, from this data at this time.