Frequency Shift of the Zero-Field Hyperfine Splitting of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Cs</mml:mi></mml:mrow><mml:mrow><mml:mn>133</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Produced by Various Buffer Gases

Arditi, M.; Carver, Thomas R.

doi:10.1103/physrev.112.449

Cited by 76 publications

(19 citation statements)

References 3 publications

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“…If two each Rb atoms (involved in chemical interaction with the coating, rest gas or glass substrate) produce one hydrogen molecule, this continuous flow in cell volume 10cm 3 (typically 10 11 s -1 ) would produce hydrogen gas with permanently increased pressure about 10 Torr per year. On the other hand, it is well known that collisions of hydrogen molecules with Cs atoms shift their hyperfine resonance frequencies by 1,9 kHz / Torr [23]. Hence, permanently elevated background gas pressure would lead to long-term drifts of hyperfine resonance frequencies.…”

Section: Diffusion Of Rb Atoms In a Paraffin-coated Vapor Cellmentioning

confidence: 99%

Diffusion of Rb atoms in paraffin-coated resonant vapor cells

et al. 2017

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Abstract. We present the results of a study of the diffusion of Rb atoms in paraffin -coated resonant vapor cells. We have modeled the Rb diffusion both in the cell and in the coating, assuming that the main loss of Rb atoms is due to the physical absorption of the atoms by the glass substrate. It is demonstrated that the equilibrium atomic density in the cell is a monotonic function of the thickness of the paraffin coating: the density increases with an increase in the thickness of the coating. The diffusion coefficient for rubidium in paraffin thin films has been determined to be equal to 4.7  10 -7 cm 2 /s. The results of the experiment might be useful for a better understanding of the details involved in the processes of the interaction of alkali atoms with a paraffin coating and atomic diffusion in resonant vapor cells.

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Section: Diffusion Of Rb Atoms In a Paraffin-coated Vapor Cellmentioning

confidence: 99%

Diffusion of Rb atoms in paraffin-coated resonant vapor cells

et al. 2017

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“…If the background gas pressure is too high for alkali atoms to travel freely between the walls, the influences of the collisions should be taken into account. For example, collisions between cesium atoms and hydrogen molecules, which are typical species of the background gas [10][11][12], shift the ground state hyperfine transition frequency by 14 Hz/Pa [14] at 30…”

Section: Introductionmentioning

confidence: 99%

Non-negligible collisions of alkali atoms with background gas in buffer-gas-free cells coated with paraffin

Sekiguchi

Hatakeyama

2016

Appl. Phys. B

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We measured the rate of velocity-changing collisions (VCCs) between alkali atoms and background gas in buffer-gas-free anti-relaxation-coated cells. The average VCC rate in paraffin-coated rubidium vapor cells prepared in this work was 1 × 10 6 s −1 , which corresponds to ∼ 1 mm in the mean free path of rubidium atoms. This short mean free path indicates that the background gas is not negligible in the sense that alkali atoms do not travel freely between the cell walls. In addition, we found that a heating process known as "ripening" increases the VCC rate, and also confirmed that ripening improves the anti-relaxation performance of the coatings.

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“…54), and hyperfine interactions in alkali-metal atoms are affected by collisions with inert-gas atoms (Ref. 55). It is clear that much can be learnt both about wavefunctions and intermolecular forces from experimental and theoretical studies of these effects.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

The effects of collisions on molecular properties

Buckingham¹

1980

Pure and Applied Chemistry

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-This lecture is concerned with the changes in molecular properties that result from intermolecular forces. In addition to the potential energy, the optical, electric and magnetic properties of molecules, as well as transition probabilities, may change as a result of collisions. Some properties, such as simultaneous transitions and the circular dichroism of an achiral solute in a chiral solvent, result entirely from the interaction.In the general theory of the effects of long-range intermolecular forces on molecular properties, the change is expressed in terms of properties of the free molecules. The usefulness and limitations of such a description are considered. Progress in understanding intermolecular forces and solvent effects will depend upon a combination of experiment, ab initio computation and simulation.

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Frequency Shift of the Zero-Field Hyperfine Splitting ofCs133Produced by Various Buffer Gases

Cited by 76 publications

References 3 publications

Diffusion of Rb atoms in paraffin-coated resonant vapor cells

Diffusion of Rb atoms in paraffin-coated resonant vapor cells

Non-negligible collisions of alkali atoms with background gas in buffer-gas-free cells coated with paraffin

The effects of collisions on molecular properties

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