Electron-photon angular correlation measurements for excitation of the 2P state of hydrogen at 55 and 100 eV

Electron-photon angular correlations have been measured for excitation of the 2P state of hydrogen at incident energies of 55 and 100 eV. The data presented extend the results of Weigold and co-workers (1980) to smaller scattering angles and reveal the existence of a deep minimum in the parameter lambda at theta e =10 degrees at an incident electron energy of 100 eV.