engleski

Determination of the atom number density in rubidium vapour

A new method for the atom number density determination in alkali vapour is proposed. The method is based on the comparison of numerical simulation of the alkali self-broadened resonance lines absorption profiles with measured ones. The numerical simulation calculates absorption profiles starting from the relevant set of alkali ab initio potential curves, using semiclassical stationary point approximation. As a result, the reduced absorption coefficient (absorption coefficient divided by the square of the atom number density) is obtained. By adjusting the temperature parameter of the model, it is shown that in the spectral region around resonance lines excellent agreement between simulated and experimental absorption profiles can be achieved.

number density; rubidium; absorption

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