New standard magnetic field values determined by cancellations of 85Rb and 87Rb atomic vapors 52S1/2→62P1/2,3/2 transitions

• Published in: Journal of quantitative spectroscopy & radiative transfer Vol. 257
• Main Authors: Momier, Rodolphe, Aleksanyan, Artur, Gazazyan, Emil, Papoyan, Aram, Leroy, Claude
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-12-2020; Elsevier
• Subjects: Atomic spectroscopy; Hyperfine structure; Physics; Polarization; Zeeman effect; Hyperfine structure; Polarization; Zeeman effect; Atomic spectroscopy
• ISSN: 0022-4073; 1879-1352
• DOI: 10.1016/j.jqsrt.2020.107371

•Several hyperfine transitions of rubidium are cancelled for very precise values of the applied magnetic field.•It is now possible to determine transition cancellations numerically and, in some cases, analytically.•Measuring (precisely) the magnetic field values could help refining the values of some physical constants.
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In this article, we study the theoretical behaviour of all the possible hyperfine transitions (π, σ+ and σ−) between the 5S and 6P states of 87Rb and 85Rb atomic vapors under the influence of an external magnetic field B. We show that, for specific transitions, we obtain one or several B-values for which the transition intensity is cancelled. The precision of these values is limited to the uncertainty of the physical quantities that are involved in the problem, thus measuring precisely the B-values for the cancellations could be a way to determine these quantities more precisely. In the simplest cases involving 2 × 2 Hamiltonians, we give eigenvectors, eigenvalues and analytical formulas to determine the transition cancellation. By checking accuracy between formulas and numerical simulations, we conclude that it is possible to use the latter in order to determine all the cancellations even in the most complicated cases.