Abstract
We describe the use of a new Doppler-free technique, two-photon optogalvanic spectroscopy (TOGS) in the observation of thirteen transitions from the four levels in the 3s configuration of 20Ne. The transitions from the two nonmetastable 3s levels are the first Doppler-free two-photon transitions reported from energy levels other than ground or metastable levels. This is also the first report of Doppler-free measurement of the 4d[5/2] J = 2–4d[5/2] J = 3 splitting in 20Ne.
© 1979 Optical Society of America
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