Direct Spectroscopic Observation of Electrons in Image-Potential States Outside Liquid Helium

doi:10.1103/PHYSREVLETT.32.280

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Direct Spectroscopic Observation of Electrons in Image-Potential States Outside Liquid Helium

C. C. Grimes, T. R. Brown

Feb 11, 1974

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Physical Review Letters

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Key Takeaway

Key Takeaway: Electrons bound in image-potential-induced surface states outside liquid helium show the linear Stark effect in the presence of an electric field, with zero-field splittings at 125.9 and 148.6 GHz.

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.

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