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Non-negligible collisions of alkali atoms with background gas in buffer-gas-free cells coated with paraffin
- Source :
- Applied Physics B. 122
- Publication Year :
- 2016
- Publisher :
- Springer Science and Business Media LLC, 2016.
-
Abstract
- 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 $1 \times 10^{6}$ s$^{-1}$, which corresponds to $\sim 1$ 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.<br />Comment: 5 pages, 4 figures
- Subjects :
- Alkali atoms
Work (thermodynamics)
Materials science
Physics and Astronomy (miscellaneous)
Atomic Physics (physics.atom-ph)
Mean free path
Buffer gas
General Engineering
Analytical chemistry
FOS: Physical sciences
General Physics and Astronomy
chemistry.chemical_element
02 engineering and technology
Sense (electronics)
021001 nanoscience & nanotechnology
Spin relaxation time
01 natural sciences
Physics - Atomic Physics
Rubidium
chemistry
0103 physical sciences
010306 general physics
0210 nano-technology
Subjects
Details
- ISSN :
- 14320649 and 09462171
- Volume :
- 122
- Database :
- OpenAIRE
- Journal :
- Applied Physics B
- Accession number :
- edsair.doi.dedup.....eb691da90e16df78098f589688089c2d