Direct Spectroscopic Observation of Electrons in Image-Potential States Outside Liquid Helium
- 11 February 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 32 (6) , 280-283
- https://doi.org/10.1103/physrevlett.32.280
Abstract
We present the first direct spectroscopic study of electrons bound in image-potential-induced surface states outside liquid helium. We have observed absorption lines which show the expected linear Stark effect in the presence of an electric field. Zero-field splittings extrapolated from the data are 125.9 and 148.6 GHz for electronic transitions from the ground state to the first two excited states in the image-potential well.Keywords
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