Accession Number : AD0670060

Title :   ON THE COEFFICIENT OF SURFACE IONIZATION OF FAST SECONDARY PARTICLES (O KOEFFITSIENTE POVERKHNOSTNOI IONIZATSII BYSTRYKH VTORICHNYKH CHASTITS),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Arifov,U. A. ; Khadzhimukhamedov,Kh. Kh. ; Ayukhanov,A. Kh.

Report Date : 19 SEP 1967

Pagination or Media Count : 11

Abstract : After a brief review of the literature, it is noted that there is no clarity in the question on the charge state of fast particles emitted from a surface and on the application of the law of surface ionization to these particles. Therefore, an experimental study was undertaken on the charge state of surface-emitted fast particles depending on the ionization energy and potential of bombarding ions. It was concluded that the scattering in the form of positive ions depends not on the charge state of the primary particle, but on the ionization potential of the bombarding particle. This process, however, only qualitatively agrees with the mechanisms of surface ionization. This should have been expected, since secondary scattered ions have an entire energy spectrum, from thermal to limiting, determined by single and multiple elastic collisions of the bombarding particle with the atoms of the metal. A better agreement of the results with the surface ionization mechanism may be obtained, apparently, only for the group of slow ions with energies below 10 ev.

Descriptors :   (*ION BOMBARDMENT, *SECONDARY EMISSION), SURFACES, IONIZATION, EMISSIVITY, IONIZATION POTENTIALS, CESIUM, ION BEAMS, TUNGSTEN, USSR

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE