Precision measurement of the oscillator strength of the cesium 6 2S 1/2 →5 2D 5/2 electric quadrupole transition in propagating and evanescent wave fields

Details Precision measurement of the oscillator strength of the cesium 6 2S 1/2 →5 2D 5/2 electric quadrupole transition in propagating and evanescent wave fields Precision measurement of the oscillator strength of the cesium 6 2S 1/2 →5 2D 5/2 electric quadrupole transition in propagating and evanescent wave fields

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005phrva..71a2507t&link_type=abstract

Physical Review A, vol. 71, Issue 1, id. 012507

Physics

6

Visible And Ultraviolet Spectra, Oscillator Strengths, Lifetimes, Transition Moments, Laser Spectroscopy

Scientific paper

Hyperfine-structure-resolved absorption spectra of the 6 2S 1/2 →5 2D 5/2 of cesium atoms have been observed with a temperature-controlled cell and a diode laser. From a comparison with the absorption of the D2 transition at the same atom density range, the oscillator strength of the electric quadrupole transition was determined to be (4.69±0.05) ×10-7 . Reflection spectra of the same transition have also been observed in the partial and total reflection regimes with a reflection cell. An increase in the apparent oscillator strength was observed for total reflection with an increase in the angle of incidence, by a factor up to 1.5 at θc+83.8 mrad and 2.4 at θc+107.5 mrad for s and p polarizations, respectively, where θc is the critical angle. The observed enhancement is ascribed to the incidence-angle-dependent wave vector and polarization vector of the evanescent wave.

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