Abstract
Measurements in the deuteron energy range MeV have been made as follows on the reaction : (a) differential cross sections for protons to ground state and (3.09 MeV) as functions of angle and energy, (b) proton polarization to ground state and (3.09 MeV) as function of energy at 45° (lab system) and as functions of angle (10° to 120° lab) for protons to 3.09-MeV state at MeV, and (c) proton-gamma correlation measurements with the gamma-ray detector on the normal to the reaction plane for reactions to (3.68 MeV) and (3.85 MeV). In (b) and (c) a double-focusing magnetic spectrometer selected the proton group in question; the polarization of the selected protons was measured by observing the "left-right" asymmetry from a carbon scatterer. Backgrounds were made negligible in the polarization work by coincidence methods. All the data show fluctuations with deuteron energy throughout the energy range studied; these fluctuations are attributed to compound-nucleus effects which invalidate a distorted-wave Born approximation (DWBA) stripping interpretation of results at isolated energies although direct interaction is the predominant mechanism. It is shown by taking average values over a wide energy range (∼4 MeV) that a DWBA stripping description of the direct-interaction part of the reaction almost certainly will require the use of spin-dependent potentials.
- Received 18 March 1963
DOI:https://doi.org/10.1103/PhysRev.131.1632
©1963 American Physical Society