Accession Number : AD0680677

Title :   MULTIPLE IONIZATION OF MERCURY BY SUCCESSIVE ELECTRON IMPACTS,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) RADIO AND ELECTRICAL ENGINEERING DIV

Personal Author(s) : Redhead,P. A. ; Feser,S.

Report Date : 13 MAY 1968

Pagination or Media Count : 10

Abstract : Mercury ions of charge multiplicity up to n = 9 have been formed by repeated collisions of slow electrons (less than 150 eV) with ions trapped in an electron beam of high current density (.05 A/sq cm). Ion current is observed at electron energies below the ionization potential for all multiply charged ions up to n = 8 and is ascribed to collision sequences involving metastable states of the ions (eN/eN(m)/ee(N + 1), where N represents an ion of charge multiplicity n). All the breaks observed in the ionization probability curves for n < or = 3 can be explained in terms of collision sequences involving spectroscopically known metastable levels as limiting steps. Measured ionization potentials of the highly ionized species up to n = 9 are in reasonable agreement with extrapolation of spectroscopic values. (Author)

Descriptors :   (*MERCURY, IONIZATION), (*ELECTRON IRRADIATION, MERCURY), ELECTRON BEAMS, INTERACTIONS, ATOMIC ENERGY LEVELS, CANADA

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE