Light-Pressure-Induced Shifts of 2³S(J=1) = 2³P(J=0,1,2) Helium Lines in a Vapor Cell and Implications for the Fine Structure Constant Measurement

2004/01/15 by Tanya Zelevinsky, T. Zelevinsky, Zelevinsky, T.
Physics and Astronomy · #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum, superfluid, helium dynamics #physics.atom-ph

paper · pdf · doi:10.48550/arxiv.physics/0401074

This paper has been temporarily withdrawn

openalex publication_date 2004/01/15 · arxiv created 2004/01/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

This paper has been temporarily withdrawn by the authors. In the process of 4He 2P fine structure measurement in a vapor cell, highly nonlinear dependences of 2S₁ - 2P_J intervals on helium density are observed and attributed to light pressure. If total angular momentum of the excited state is not greater than that of the ground state, there are large polarization dependences and variations of shifts with helium pressure that exhibit apparent singularities. A pressure-variable cell may be a better system for control of this effect than an atomic beam. A method of avoiding the shifts for the fine structure measurement is suggested.

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