Accession Number : AD0412326

Title :   THE EFFECT OF LIGHT MOLECULES ON VIBRATIONAL RELAXATION IN OXYGEN.

Descriptive Note : Technical rept.,

Corporate Author : MISSISSIPPI UNIV UNIVERSITY

Personal Author(s) : Shields,F.D. ; Lee,K.P.

Report Date : 18 JUL 1963

Pagination or Media Count : 22

Abstract : Sound absorption and velocity measurements have been made in O2 with added amounts of H2, D2 and He. The number of collisions, Z sub 10(AB), necessary to de-excite the first vibrational state of O2 has been calculated from the measured relacation times. These values are in general agreement with values reported by Parker; Holmes, Smith, and Tempest; and White and Millikan. When log Z sub 10 (AB) is plotted vs the cube root of the reduced mass times the square of the vibrational frequency divided by the absolute temperature a linear relationship is found be tween the O2-H2 and the O2-He data. However Z sub 10 (O2-D2) is unexpectedly longer than Z sub 10 (O2-He). When the collision numbers, Z sub 10, for pure O2 and N2 are plot in this way they fall along a single curve. (Author)

Descriptors :   (*GASES, MOLECULAR PROPERTIES), (*OXYGEN, MOLECULAR PROPERTIES), MOLECULES, SOUND, ABSORPTION, VELOCITY, MEASUREMENT, HYDROGEN, DEUTERIUM, HELIUM, RELAXATION, TEMPERATURE, VIBRATION.

Distribution Statement : APPROVED FOR PUBLIC RELEASE