Accession Number : AD0697447

Title :   THRESHOLD BEHAVIOR OF THE CROSS SECTION FOR IONIZATION OF He AND Ar BY MONO-ENERGETIC ELECTRONS,

Corporate Author : LAVAL UNIV QUEBEC CENTRE DE RECHERCHES SUR LES ATOMES ET LES MOLECULES

Personal Author(s) : Merchand,P. ; Paquet,C. ; Marmet,P.

Report Date : 16 DEC 1968

Pagination or Media Count : 11

Abstract : A new apparatus using crossed-beam techniques with a cylindrical electrostatic electron velocity selector for the study of ionization probability curves of gases is described. Results for He(+) and Ar(+) in the first eV above the ionization threshold are given. New computer techniques determine structure and near-threshold behavior. A simple power law yields a good representation of the experimental results for each ion state, with a different power in each case. For He a power law with power 1.16 is found. The results for Ar may be represented by two power laws with powers 1.3 and 1.34, respectively, joining at the energy of the doublet P(1/2) level of Ar(+). (Author)

Descriptors :   (*HELIUM, *GAS IONIZATION), (*ARGON, GAS IONIZATION), ELECTRON IRRADIATION, LABORATORY EQUIPMENT, DESIGN

Subject Categories : Physical Chemistry
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE