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Updated: Jun 20, 2026

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy
Published on: May 18, 2011
Ramsey fringes in the nonlinear Hanle effect in a metastable atomic beam
G Bertuccelli1, N Beverini, M Galli
1Dipartimento di Fisica deli' Universitá, Piazza Torricelli 2, I-56100 Pisa, Italy.
Abstract:
Evidence of coherence effects has been observed in the Zeeman sublevels by means of nonlinear level crossing in a metastable Ca beam with resonance width 3 orders of magnitude less than the radiative linewidth of the investigated transitions. By using two separate traveling waves, Ramsey-like fringes have been observed. The final measured widths are determined by the transit time, are weakly dependent on the magnetic-field inhomogeneities, and are independent of the natural width of the optical transitions and the laser bandwidth.
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