Accession Number : AD0744097

Title :   Atomic Oxygen Absorption Cell System.

Descriptive Note : Final rept. 15 Apr 70-15 Dec 71,

Corporate Author : PHOTOCHEM INDUSTRIES INC FAIRFIELD N J

Personal Author(s) : Cerkanowicz,Anthony E. ; Simon,Donald R. ; Levy,Maurice E. ; Strowe,Robert J.

Report Date : 15 DEC 1971

Pagination or Media Count : 71

Abstract : An atomic oxygen absorption cell system has been developed for application in the measurement of absorption cross sections of atomic oxygen at wavelengths shorter than 910 A (the first ionization threshold). The system is based on vacuum ultraviolet photodissociation of oxygen molecules via absorption of light in the Schumann-Runge continuum (1300 A to 1760 A). The necessary dissociative vacuum ultraviolet flux is supplied from a cylindrical, xenon, plasma source which surrounds a sapphire walled absorption cell. The pressure, annular thickness and length of the xenon plasma is variable. Analysis indicates that an oxygen atom concentration in excess of 90% can be achieved under steady operating conditions. The cell is constructed to be compatible with McPherson vacuum monochromators. (Author)

Descriptors :   (*OXYGEN, ATOMIC SPECTROSCOPY), ULTRAVIOLET SPECTROSCOPY, ABSORPTION SPECTRA, LABORATORY EQUIPMENT, DISSOCIATION, SOURCES

Subject Categories : Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE