Experimental Studies of the Collisional Excitation of Infrared Active Vibrational Stretch Modes in CO2 and H2O with an Intersecting, Hyperthermal Molecular Beam Apparatus. Volume 1
Abstract
An intersecting, hyperthermal energy molecular beam apparatus with a liquid nitrogen called infrared radiation detector system designed to measure T- V collisional excitation cross sections for the infrared active modes of small molecules is described in this report. In addition, a novel infrared calibration technique using the self-emission of a molecular beam containing H2O or CO2 formed by supersonic expansion from a high temperature nozzle is presented and the design and testing of a dc arc heated supersonic nozzle source for producing molecular beams of atomic oxygen seeded in noble gases is discussed. Measured upper bounds for T-V excitation of the CO2 and H2O nu 3 vibrational modes in collision with N2 at several relative collision velocities in the range of 4 to 8 km/second are presented and compared to literature values for total scattering cross sections of CO2 and H2O as well as to previous experimental and theoretical determinations of CO2 and H2O nu 3 activation cross sections.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1975
- Accession Number
- ADA006237
Entities
People
- C. E. Kolb
- J. B. Anderson
- J. B. Fenn
- M. Camac
- R. B. Subbarao
Organizations
- Aerodyne Research