Self-focusing in SF/sub 6/

Journal Article · Thu Jan 01 04:00:00 EST 1981 · Proc. Soc. Photo-Opt. Instrum. Eng.; (United States)

OSTI ID:6510784

Ackerhalt, J R; Galbraith, H W

It is shown by explicit calculation of the previously published quasicontinuum model that the molecular susceptibility rapidly approaches zero as higher excited states of the molecule become populated. Hence the overtones of the nu/sub 3/-pumped mode are totally responsible for the self focusing effects in SF/sub 6/. The nu/sub 3/ ladder contribution to the susceptibility is calculated. The vibrational model is a classical triply degenerate anharmonic oscillator in the Cartesian basis with the anharmonicity parameters chosen to be consistent with the latest spectroscopic anlaysis of the 3nu/sub 3/ overtone spectrum. The rotational structure is represented by a distribution of these oscillators where the distribution is chosen to correspond to the spectrum of the nu/sub 3/ fundamental. Good agreement is found with the 300K self-focusing data of Nowak and Ham at CO/sub 2/ P(28), P(20) and P(10) in SF/sub 6/.

• Research Organization: Los Alamos National Lab., NM
• OSTI ID: 6510784
• Journal Information: Proc. Soc. Photo-Opt. Instrum. Eng.; (United States), Journal Name: Proc. Soc. Photo-Opt. Instrum. Eng.; (United States) Vol. 288; ISSN SPIEC
• Country of Publication: United States
• Language: English

Related Subjects

640302* -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ABSORPTION
ANHARMONIC OSCILLATORS
BLOCH EQUATIONS
ELECTRONIC EQUIPMENT
ENERGY LEVELS
ENERGY-LEVEL DENSITY
EQUATIONS
EQUIPMENT
EXCITED STATES
FLUIDS
FLUORIDES
FLUORINE COMPOUNDS
FOCUSING
GASES
HALIDES
HALOGEN COMPOUNDS
HAMILTONIANS
LADDER APPROXIMATION
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MEDIUM TEMPERATURE
OSCILLATORS
POLARIZATION
PUMPING
QUANTUM OPERATORS
RELAXATION
SULFUR COMPOUNDS
SULFUR FLUORIDES
VAPORS