A new method for the study of the diffusion of optically oriented atoms in a buffer gas View Full Text


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Article Info

DATE

1967-06

AUTHORS

A. Gozzini, N. Ioli, F. Strumia

ABSTRACT

We describe a new method for studying the diffusion and relaxation of an optically oriented vapour inside a buffer gas. By measuring the rotatory power of the criented vapor for light whose frequency is near that of an absorption line, the vapour’s polarization can be recorded continuosly during the relaxation or the diffusion process. Moreover, since the spectral distribution of this light is outside that of the absorption line, the vapour’s polarization is practically unperturbed by the detection process. The vapour is contained in a cylindrical cell. By means of a pulse of circularly polarized light we pump the vapour into a small cylindrical region of the cell. A second beam of linearly polarized light parallel to the pumping one (the analysing beam) travels inside the cell at a distance Δx from the oriented region. To every pulse of the orienting light a signal is obtained from a polarimeter, showing that the plane of polarization of the analysing beam rotates owing to the diffusion of the atoms, oriented by the pumping pulse, into the region of the cell scanned by the analysing beam. This signal is delayed by a timeT(x) from the pumping pulse. By measuringT(x) as a function of Δx, it is possible to obtain the diffusion coefficientD and the cross-section for disorienting collisions against the buffer gasσ. The experiment has been carried out orienting sodium vapour in He as a buffer gas. More... »

PAGES

185-193

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/bf02710617

DOI

http://dx.doi.org/10.1007/bf02710617

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1039998484


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