EVIDENCE FOR ELECTRON-CAPTURE TO THE CONTINUUM BY PROTONS SCATTERED AT NON-0-DEGREES ANGLES FROM AR ATOMS

The process of electron capture to the continuum (ECC) has been studie d at non-0 degrees electron emission angles in a type of experiment in which the electrons ejected in a given direction are detected in coin cidence with the outgoing projectiles scattered on the target nucleus in the same direction. Triply differential cross sections (differentia l with respect to the energy and angle of the ejected electron and the angle of the scattered projectile) have been determined for 75-keV pr oton on Ar collisions at scattering angles 3.7 degrees, 5.0 degrees, a nd 8.1 degrees. The occurrence of the cusp peak in the coincidence spe ctra gives an evidence for the existence of the ECC process at non-0 d egrees emission angles. The experimental data are compared with result s of first-order distorted wave Born and classical trajectory Monte Ca rlo (CTMC) calculations.