Intensities and the Fano line shape in the infrared spectrum of HD

Journal Article · Thu Feb 15 04:00:00 EST 1973 · Can. J. Phys., v. 51, no. 4, pp. 389-397

DOI:https://doi.org/10.1139/p73-050· OSTI ID:4316102

McKellar, A R.W.

The spectnam of gaseous HD at a temperature of 77 K and densities from 1 to 60 amagat was studied in the regions of the fundamental and first overtone bands. The 1- 0 band consists of two components: a collision-induced part, made up of broad Q and S transitions arising from collisions between molecules, and a dipole-allowed part, made up of much sharper P and R transitions due to free molecules. The collision-induced 2-- 0 band was too weak to be observed in these experiments, but the first overtone R(0) transition was studied. The collisioninduced fundamental band shows the expected similarity to the previously observed spectra of H/sub 2/ and D/sub 2/. A pronounced asymmetry in the fundamental band P and R transitions may be ascribed to a resonant interference with the underlying collision-induced continuum. Measurements of the intensities of the appropriate R(0) lines yield the following transition dipole moments: (0.49 plus or minus 0.02) x 10/sup -4/ for the fundamental, and (0.21 plus or minus 0.02) x 10/sup -4/ D for the first overtone band. (auth)

• Research Organization: National Research Council of Canada, Ottawa
• NSA Number: NSA-29-022216
• OSTI ID: 4316102
• Journal Information: Can. J. Phys., v. 51, no. 4, pp. 389-397, Journal Name: Can. J. Phys., v. 51, no. 4, pp. 389-397; ISSN CJPHA
• Country of Publication: Canada
• Language: English

Related Subjects

*DEUTERIUM-- EMISSION SPECTRA
*HYDROGEN-- EMISSION SPECTRA
ASYMMETRY
DIPOLE MOMENTS
DIPOLES
ENERGY-LEVEL TRANSITIONS
GASES
INTERFERENCE
MOLECULE-MOLECULE COLLISIONS
N60200* --Physics (Atomic & Molecular)--Atomic & Molecular Properties
RESONANCE