Induced absorption spectra of the infrared fundamental band of molecular deuterium at 77 K: S/sub 1/( J)+S/sub 0/( J) transitions

Journal Article · Mon Oct 15 04:00:00 EDT 1984 · J. Chem. Phys.; (United States)

OSTI ID:6467954

Gillard, P G; Prasad, R D.G.; Reddy, S P

The collision-induced spectra of the fundamental band of normal D/sub 2/ in the high frequency region 3200--3700 cm/sup -1/ were recorded for gas densities in the range 80--140 amagat at 77 K with a 2 m absorption cell. The contribution to the intensity of the band in this region comes from the high frequency wings of quadrupolar transitions S/sub 1/( J) and Q/sub 1/( J)+S/sub 0/( J) with J = 0 and 1, and from the group of transitions S/sub 1/(2) and Q/sub 1/( J)+S/sub 0/(2) with J = 0, 1, and 2 as well as from the relatively weaker double rotational transitions of the type S/sub 1/( J)+S/sub 0/( J); the latter transitions arise from the intermolecular interaction between the anisotropic component of the polarizability of one of the colliding pairs of molecules and the quadrupole field of the other. The experimental profiles were analyzed by assuming appropriate line shape functions and using the theoretical matrix elements of the quadrupole moment, isotropic polarizability, and anisotropy of polarizability of the D/sub 2/ molecule. From this analysis the characteristic half-width parameters delta/sub q/2 and delta/sub q/4 of the quadrupolar transitions and the binary and ternary absorption coefficients of the S/sub 1/( J)+S/sub 0/( J) transitions have been obtained. The experimental value of the binary absorption coefficient of S/sub 1/(0)+S/sub 0/(0) is (2.2 +- 0.1) x 10/sup -9/ cm/sup -1/ amagat/sup -2/ and the corresponding theoretical value is 1.53 x 10/sup -9/ cm/sup -1/ amagat/sup -2/.

• Research Organization: Department of Physics, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X7
• OSTI ID: 6467954
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 81:8; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
DEUTERIUM
ELECTRICAL PROPERTIES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
HYDROGEN ISOTOPES
INFRARED SPECTRA
ISOTOPES
LIGHT NUCLEI
LINE WIDTHS
NUCLEI
ODD-ODD NUCLEI
PHYSICAL PROPERTIES
POLARIZABILITY
ROTATIONAL STATES
SPECTRA
STABLE ISOTOPES