Features of the Formation of the Spin Polarization of an Alkali Metal at the Resolution of Hyperfine Sublevels in the 2 S 1/2 State

The optical orientation of the angular momenta of alkali atoms in the presence of a buffer gas (molecular nitrogen) has been studied experimentally. It has been shown that, even at a low concentration of molecular nitrogen in the cell, the excitation of 133Cs atoms from the lower hyperfine level wit...

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Bibliographic Details
Published in:JETP letters 2018-01, Vol.108 (8), p.513
Main Authors: Popov, E N, Bobrikova, V A, Voskoboinikov, S P, Barantsev, K A, Ustinov, S M, Litvinov, A N, Vershovskii, A K, Dmitriev, S P, Kartoshkin, V A, Pazgalev, A S, Petrenko, M V
Format: Article
Language:English
Subjects:
Alkali metals
Cesium 133
Cesium isotopes
Excitation
Magnetic resonance
Nitrogen
Nuclei (nuclear physics)
Polarization (spin alignment)
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Summary:The optical orientation of the angular momenta of alkali atoms in the presence of a buffer gas (molecular nitrogen) has been studied experimentally. It has been shown that, even at a low concentration of molecular nitrogen in the cell, the excitation of 133Cs atoms from the lower hyperfine level with F = 3, which belongs to the ground 2S1/2 state, results in a larger amplitude of the magnetic resonance than the excitation from the hyperfine level with F = 4. This result has been theoretically explained under the assumption that the spin state of the alkali atomic nucleus does not change at collision with a nitrogen molecule, which is accompanied by a nonradiative transition of the alkali atom from the excited 2P1/2 state to the ground 2S1/2 state.
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364018200122