Analysis of nonresonant effects in the two-photon spectroscopy of helium
- 18 August 2021
- journal article
- research article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 54 (16), 165002
- https://doi.org/10.1088/1361-6455/ac232c
Abstract
In the present paper, we study nonresonant corrections for experimental measurements of the transition frequencies in the helium atom. Having attracted more attention, such effects can make a significant contribution to experiments based on one- and two-photon atomic spectroscopy. The quantum interference effects in the measurements of n (3) S (1) - 3(3) D (1) (n = 3, 4, 5) transition frequencies based on Doppler-free two-photon spectroscopy, are considered as a possible source of current discrepancy between the experimental and theoretical data. We demonstrate that line profile asymmetry caused by the quantum interference of fine sub-levels of the DJ3(J=1,2,3) <i state can reach tenths of a megahertz for different experimental conditions. Thus, previously unaccounted nonresonant corrections should be taken in next-generation experimental measurements of transitions frequencies in helium. However, they could not completely eliminate the current imbalance in the study of helium spectra and the question is still open.Funding Information
- Russian Science Foundation (20-72-00003)
This publication has 26 references indexed in Scilit:
- Energy levels for the stable isotopes of atomic helium(4He I and3He I)Canadian Journal of Physics, 2006
- Nonresonant effects in one- and two-photon transitionsCanadian Journal of Physics, 2002
- Nonresonant corrections to thetwo-photon resonance for the hydrogen atomPhysical Review A, 2002
- Asymmetry of the Natural Line Profile for the Hydrogen AtomPhysical Review Letters, 2001
- Frequency measurement of the 2S-12D transitions in hydrogen and deuterium, new determination of the Rydberg constantIEEE Transactions on Instrumentation and Measurement, 1999
- Radiative lifetimes of He I 33S1and 33DJby beam-gas dye-laser spectroscopyJournal of Physics B: Atomic, Molecular and Optical Physics, 1991
- Lifetimes of singly excited states in He IPhysical Review A, 1984
- Precision Wavelength Measurements and New Experimental Lamb Shifts in HeliumPhysical Review Letters, 1983
- Two-Photon Decay of the Singlet and Triplet Metastable States of Helium-like IonsPhysical Review B, 1969
- Natural Line ShapePhysical Review B, 1952