Accession Number : AD0637193

Title :   TEMPERATURE DEPENDENCE OF HELIUM TRANSFER CROSS SECTIONS.

Descriptive Note : Scientific rept. Jan 65-Mar 66.

Corporate Author : OKLAHOMA UNIV RESEARCH INST NORMAN

Personal Author(s) : St. John ,Robert M. ; Jobe,John D.

Report Date : APR 1966

Pagination or Media Count : 48

Abstract : Helium gas at a pressure of 63 microns and variable temperature has been excited by the impact of 100 eV electrons. At this pressure atomic collisions are plentiful and the excitation energy is thereby transferred from one state to another, primarily from singlet states to singlet and triplet D states. The 'multiple state' transfer process (transfer from N-singlet-P to nF and cascade from nF to lower singlet and triplet D states) is examined in light of the data acquired on the density of singlet P states for n from 3 through 8, singlet D states for n from 4 through 6, and triplet D states for n from 3 through 10. These data were acquired at 8 temperatures in the range from 300 to 1000K. (Author)

Descriptors :   (*HELIUM, *ATOMIC ENERGY LEVELS), ELECTRON IRRADIATION, EXCITATION, PROBABILITY, TRANSPORT PROPERTIES, ELECTRON TRANSITIONS

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE