Spin-polarized lithium diffusion in a glass hot-vapor cell

Ishikawa, Kiyoshi

doi:10.1007/s00340-016-6505-x

Cited by 9 publications

(2 citation statements)

References 25 publications

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“…Previous measurements of diffusion coefficients have involved analyzing transient signals associated with the optical pumping of alkali vapors [12,14,[18][19][20][21], measuring the amplitude decay of spin echoes in a magnetic gradient [15,22], and analyzing the spectrum of transmitted probe light well below the shot-noise limit to directly observe atomic motion [23]. The diffusion coefficient may also be determined indirectly via measurements of collision cross-sections [24].…”

Section: Introductionmentioning

confidence: 99%

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Pouliot,

Carlse,

Vacheresse

et al. 2021

Preprint

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We demonstrate a new technique for the accurate measurement of diffusion coefficients for alkali vapor in an inert buffer gas. The measurement was performed by establishing a spatially periodic density grating in isotopically pure 87 Rb vapor and observing the decaying coherent emission from the grating due to the diffusive motion of the vapor through N2 buffer gas. We obtain a diffusion coefficient of 0.245 ± 0.002 cm 2 /s at 50 • C and 564 Torr. Scaling to atmospheric pressure, we obtain D0 = 0.1819 ± 0.0024 cm 2 /s. To the best of our knowledge, this represents the most accurate determination of the Rb-N2 diffusion coefficient to date. Our measurements can be extended to different buffer gases and alkali vapors used for magnetometry and can be used to constrain theoretical diffusion models for these systems.

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Section: Introductionmentioning

confidence: 99%

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Pouliot,

Carlse,

Vacheresse

et al. 2021

Preprint

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“…Aluminum oxide materials (Al 2 O 3 ) such as crystalline sapphire and polycrystalline alumina (PCA) are alkali-resistant even at higher temperatures (for example, up to ∼1500 • C for sodium [6] and ∼1000 • C for cesium [7]) unless they are exposed to hot lithium vapor [8][9][10]. Since sapphire crystal is transparent across a wide range of wavelengths, from the visible to the infrared spectrum, sapphire crystals have been used as optical windows in a number of alkali-vapor cell experiments conducted at high temperatures [6,[11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Spectroscopic study of a diffusion-bonded sapphire cell for hot metal vapors

et al. 2017

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Characteristics of a diffusion-bonded sapphire cell for optical experiments with hot metal vapors were investigated. The sapphire cell consisted of sapphire-crystal plates and a borosilicate-glass tube, which were bonded to each other by diffusion bonding without any binders or glues. The glass tube was attached to a vacuum manifold using the standard method applied in glass processing, filled with a small amount of Rb metal by chasing with a torch, and then sealed. The cell was baked at high temperatures, and optical experiments were then performed using rubidium atoms at room temperature. The sapphire cell was found to be vacuum tight, at least up to 350°C, and the sapphire walls remained clear over all temperatures. From the optical experiments, the generation of a background gas was indicated after baking at 200°C. The background gas pressure was low enough to avoid pressure broadening of absorption lines but high enough to cause velocity-changing collisions of Rb atoms. The generated gas pressure decreased at higher temperatures, probably due to chemical reactions.

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Pressure effect on hyperfine CPT resonance of ground-state Li atoms in glass hot-vapor cell

Ishikawa

2019

Appl. Phys. B

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Spin-polarized lithium diffusion in a glass hot-vapor cell

Cited by 9 publications

References 25 publications

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Accurate Determination of an alkali-inert gas diffusion coefficient using coherent transient emission from a density grating

Spectroscopic study of a diffusion-bonded sapphire cell for hot metal vapors

Pressure effect on hyperfine CPT resonance of ground-state Li atoms in glass hot-vapor cell

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