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Comparison of theoretical and experimental red and near infrared absorption spectra in overheated potassium vapour (CROSBI ID 114074)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Vadla, Čedomil ; Beuc, Robert ; Horvatic, Vlasta ; Movre, Mladen ; Quentmeier, Alfred ; Niemax, Kay Comparison of theoretical and experimental red and near infrared absorption spectra in overheated potassium vapour // European physical journal D : atomic, molecular and optical physics, 37 (2006), 1; 37-49-x

Podaci o odgovornosti

Vadla, Čedomil ; Beuc, Robert ; Horvatic, Vlasta ; Movre, Mladen ; Quentmeier, Alfred ; Niemax, Kay

engleski

Comparison of theoretical and experimental red and near infrared absorption spectra in overheated potassium vapour

The K2 molecular spectra have been theoretically and experimentally investigated in the wavelength range between 550 nm and 1100 nm and for the temperatures between 650 K and 1100 K. Semiclassical theoretical simulations were performed using the most recent data for the potential energy curves for the K(4S)+K(4S) and K(4S)+K(4P) systems and the relevant dipole transition moments. The calculated temperature dependent absorption spectra show an overall very good agreement with the experimental findings, especially in comparison with previous theoretical results. The measurements were performed by a spatially resolved absorption method in an inhomogeneous overheated potassium vapour generated in a heat-pipe. In addition, the temperature independent reduced absorption coefficients of the potassium diffuse triplet bands were measured. The obtained data can be used for a simple and accurate determination of potassium atom number densities in the range from 5x10^16 cm^(-3) to 5x10^(18) cm^(-3)

molecular spectra; infrared spectra; potential curves; number density determination

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Podaci o izdanju

37 (1)

2006.

37-49-x

objavljeno

1434-6060

Povezanost rada

Fizika

Indeksiranost