PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
We demonstrate a 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 87Rb 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 cm2 /s at 50°C and 564 Torr. Scaling to atmospheric pressure, we obtain D0 = 0.1819 ± 0.0024 cm2 /s. To the best of our knowledge, this represents the most accurate determination of the Rb-N2 diffusion coefficient. 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
Alexander Pouliot,Gehrig Carlse,Thomas Vacheresse, andAnantharaman Kumarakrishnan
"Accurate determination of an alkali-vapor-inert-gas diffusion coefficient using coherent transient emission from a density grating", Proc. SPIE 12016, Optical and Quantum Sensing and Precision Metrology II, 120160Q (2 March 2022); https://doi.org/10.1117/12.2616878
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Alexander Pouliot, Gehrig Carlse, Thomas Vacheresse, Anantharaman Kumarakrishnan, "Accurate determination of an alkali-vapor-inert-gas diffusion coefficient using coherent transient emission from a density grating," Proc. SPIE 12016, Optical and Quantum Sensing and Precision Metrology II, 120160Q (2 March 2022); https://doi.org/10.1117/12.2616878