Scientific Results

Precision laser spectroscopy of helium

Year: 1994

Authors: Inguscio M., Pavone F.S., Marin F., Minardi F., De Natale P., Giusfredi G., Sasso A.

Autors Affiliation: Univ of Florence, Firenze, Italy

Abstract: This paper describes recent progress in the helium spectroscopy at 398 nm starting form the metastable level 23S1. The first measurements have been obtained in a discharge absorption cell where the metastable helium is produced. In this work, results obtained with the discharge cell is compared with the measurements obtained by means of a metastable atomic beam where the atoms are less perturbed by systematics effects (collisions, as Stark fields, etc.). Also, an improvement in the two-photon spectrometer is considered, increasing the power and the spectral purity of the sources.

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KeyWords: Atomic beams; Electron energy levels; Electron transitions; Fluorescence; Helium; Laser tuning; Spectrometers, Discharge absorption cell; Nuclear charge radius; One electron lamb shift; Precision laser spectroscopy; Spectral purity, Spectroscopy
DOI: 10.1109/EQEC.1994.698104

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