Retardinghyphen;Potential Measurement of the Kinetic Energy of Electrons Released in Penning Ionization

摘要

Kinetic energy of electrons released in ionization of N2, CO, NO, COS, CO2, C2H2, CH4, C2H6, C3H8, andnhyphen;C4H10by means of helium atoms in metastable 21Sand 23Sstates was measured and the energy of electronically excited ionic states determined. In N2, CO, COS, and CO2all accessible excited states were populated probably by a Franckmdash;Condon transition. Ionization of NO seems to proceed through prehyphen;ionization of the HeNO complex in which a part of internal energy is converted into kinetic energy of He and NO+. In ionization of C2H2and CH4, energy which can be effectively stored in the C2H2+and CH4+ions in the ground state was determined and the aspects of the dissociative ionization discussed. In ionization of C2H6, C3H8, andnhyphen;C4H10, more excitation energy is conferred on the ions than in ionization by charge transfer or electron impact.