Observation of the new triple transitions [ital Q][sub 1]([ital J][sub 1])+[ital Q][sub 1]([ital J][sub 2])+[ital Q][sub 1]([ital J][sub 3]) in molecular hydrogen in its second overtone region

Journal Article · Mon Jan 16 04:00:00 EST 1995 · Physical Review Letters; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.74.367· OSTI ID:6601105

Reddy, S P; Xiang, F; Varghese, G ^[1]

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1. Department of Physics, Memorial University of Newfoundland , St. John's , Newfoundland, A1B 3X7 (Canada)

We report the first observation of simultaneous vibrational transitions [ital Q][sub 1]([ital J][sub 1])+[ital Q][sub 1]([ital J][sub 2])+[ital Q][sub 1]([ital J][sub 3]) corresponding to the triple collisions of the type H[sub 2]-H[sub 2]-H[sub 2] at 77, 201, and 298 K in the spectral region 12 300--12700 cm[sup [minus]1]. The observed integrated absorption coefficients [integral][alpha]([nu])[ital d][nu] show the density-cube dependence confirming the triple collision mechanism. The experimental ternary absorption coefficients agree within a factor of 2 or 3 with the values calculated from a theoretical model of the overlap-induced, irreducible, ternary dipole component of the three interacting hydrogen molecules, developed by Moraldi and Frommhold [preceding Letter, Phys. Rev. Lett., 74, 363 (1995)].

• OSTI ID: 6601105
• Journal Information: Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 74:3; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION SPECTRA
DATA
DIPOLES
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
EXPERIMENTAL DATA
HYDROGEN
INFORMATION
INTERMOLECULAR FORCES
MANY-BODY PROBLEM
MULTIPOLES
NONMETALS
NUMERICAL DATA
SPECTRA
TEMPERATURE RANGE
TEMPERATURE RANGE 0065-0273 K
TEMPERATURE RANGE 0273-0400 K
THREE-BODY PROBLEM
VIBRATIONAL STATES