MEASUREMENT OF CHARGE-CHANGING CROSS-SECTIONS IN COLLISIONS OF HE AND HE+ WITH H-2, O-2, CH4, CO AND CO2

Single- and double-electron loss cross sections of He, and single-electron capture and single-electron loss cross sections of He+ in collisions with H2, O2, CH4, CO and CO2 have been measured in the energy range 0.3-1.8 MeV. From the measured cross sections, charge-changing cross sections in collisions of He and He+ with C have been determined using the Bragg rule. Scaling is examined for electron capture cross sections. © 1990 Elsevier Science Publishing Co., Inc.