Emission Spectra of Hot Dense Gases.

Lalos, George T.; Hammond, Gordon L.

doi:10.1086/147294

Cited by 23 publications

(8 citation statements)

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“…Previous work has located it at 516 nm [20] or 506 nm [7]. There is an indication of the satellite near 530 nm in an experimental spectrum obtained by Lalos and Hammond [27]. Semi-classical calculations by Jungen and Staemmler [8] over a range of temperatures above 200 K have similar profile shapes to those we obtain with quantum-mechanical calculations.…”

Section: Resultssupporting

confidence: 80%

Theoretical study of pressure broadening of lithium resonance lines by helium atoms

2005

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Quantum mechanical calculations are performed of the emission and absorption profiles of the lithium 2s-2p resonance line under the influence of a helium perturbing gas. We use carefully constructed potential energy surfaces and transition dipole moments to compute the emission and absorption coefficients at temperatures from 200 to 3000 K at wavelengths between 500 nm and 1000 nm. Contributions from quasi-bound states are included. The resulting red and blue wing profiles are compared with previous theoretical calculations and with an experiment, carried out at a temperature of 670 K.

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Section: Resultssupporting

confidence: 80%

Theoretical study of pressure broadening of lithium resonance lines by helium atoms

2005

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“…Emission spectra of hot dense gases in a ballistic compressor were measured by Lalos & Hammond (1962) in a range of temperature from 3600 to 6200 K. They report an unidentified possibly Li-He "violet" band at about 0.53 µm which would agree with our calculation. The fluorescence emission spectrum of the Li(2s-2p) resonance transition in presence of helium at lower pressure and temperature (670 K) has been obtained by Scheps et al (1975).…”

Section: Theoretical Spectra Of LI Perturbed By He/hsupporting

confidence: 83%

Theoretical profiles of light alkali resonance lines for brown dwarf atmosphere conditions

Allard

Kielkopf

2005

A&A

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Abstract. The analysis of the far wings of resonance lines of alkali elements in brown dwarf spectra requires their accurate determination. A unified theory of collisional line profiles has been applied for the evaluation of absorption profiles of alkalis perturbed by helium and molecular hydrogen. The study of the dependence on temperature of the far wings of Li-He and Li-H 2 collisional profiles is reported.

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“…Weak satellite bands to the blue of the alkalimetal atom resonance lines ( 2 P) are also observed and are attributed to emission from an alkali-metal-Ar exciplex. This exciplex emission has been previously observed during rapid compression of alkali-metal vapor in a noble gas environment [36] and during MBSL from aqueous alkalihalide solutions [28,29]. The underlying continuum in Fig.…”

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confidence: 66%

Emission from Electronically Excited Metal Atoms during Single-Bubble Sonoluminescence

Flannigan

Suslick

2007

Phys. Rev. Lett.

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Variations in sonoluminescence (SL) from an acoustically driven but rapidly translating bubble in solutions of sulfuric acid with alkali-metal salts coincide with variations in translational bubble dynamics. At low acoustic pressures, emission from Ar excited states is observed and the bubble motion is smooth and elliptical. At elevated acoustic pressures, SL intensity decreases, emission from excited alkali-metal atoms is observed, and the bubble motion becomes increasingly erratic with frequent and abrupt changes in direction. These results provide a direct experimental link between single and multibubble SL and point toward the origins of sonochemical reactivity of nonvolatile species.

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Emission Spectra of Hot Dense Gases.

Cited by 23 publications

References 0 publications

Theoretical study of pressure broadening of lithium resonance lines by helium atoms

Theoretical study of pressure broadening of lithium resonance lines by helium atoms

Theoretical profiles of light alkali resonance lines for brown dwarf atmosphere conditions

Emission from Electronically Excited Metal Atoms during Single-Bubble Sonoluminescence

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