Accession Number : AD0442445

Title :   INTERACTION OF SLOW ELECTRONS WITH CHEMISORBED OXYGEN,

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

Personal Author(s) : Redhead,P. A.

Report Date : 13 JAN 1964

Pagination or Media Count : 20

Abstract : Measurements have been made of the effects of low-energy electron bombardment (0-300 ev) on a chemisorbed layer of oxygen on polycrystalline molybdenum. Oxygen is adsorbed in two states at room temperature with approximate heats of adsorp tion of 60 and 110 kcal/mole, respectively. O(+) ions are released from the weakly bound state with a maximum probability of 10 to the -5th power ion/electron at an electron energy of 90 ev. The ion-energy distribution has a maximum at about 6 ev and a half-width of 5 ev. About 50 neutrals are released for every ion. The measured threshold energy for ion formation is in good agreement with the calculated value. (Author)

Descriptors :   (*OXYGEN, ADSORPTION), (*ELECTRON IRRADIATION, MEASUREMENT), GASES, IONIZATION, PROBABILITY, CHEMICAL EQUILIBRIUM, MOLYBDENUM, VACUUM APPARATUS, TUNGSTEN, FILAMENTS, IONS, HYDROGEN, NITROGEN, CARBON COMPOUNDS, MONOXIDES, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE