By using a supersonic beam of metastable Ne* atoms and a single-mode dye laser we determine the 2p(5)3s-3p specific mass shift of the (20,22)Ne isotopes by means of optical spectroscopy. The resulting value, on the basis of a systematic measurement of transition isotope shifts at different transition energies between 15,300 and 17,000 cm(-1), is 473 +/- 2.5 MHz. This is ~ 50 MHz larger than the best-known theoretical value.
Abstract.The recently developed STIRAP-technique (J. Chem. Phys. 92, 5363 (t990)) is applied to efficient population transfer and alignment of metastable Ne* atoms. Alignment parameters in the range -0.3 > Ao 2 > --1.0 are observed. The degree of alignment can be controlled by changing the angle between the field vectors of the linearly polarized pump-and Stokes-lasers. The transfer efficiency depends also on this angle. The results of numerical calculations agree satisfactorily with the experimental data.
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