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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 35, Iss. 13 — Jul. 1, 2010
  • pp: 2146–2148

Enhancement of Rb fine-structure transfer in He 4 due to three-body collisions

J. F. Sell, M. A. Gearba, B. M. Patterson, T. Genda, B. Naumann, and R. J. Knize  »View Author Affiliations


Optics Letters, Vol. 35, Issue 13, pp. 2146-2148 (2010)
http://dx.doi.org/10.1364/OL.35.002146


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Abstract

Using ultrafast laser excitation and time-correlated single-photon counting techniques, we have measured the collisional mixing rates between the rubidium 5 2 P fine-structure levels in the presence of He 4 gas. A nonlinear dependence of the mixing rate with He 4 density is observed. We find Rb fine-structure transfer is primarily due to binary collisions at He 4 densities of 10 19 cm 3 , while at greater densities, three-body collisions become significant. We determine a three-body collisional transfer rate coefficient ( 5 2 P 3 / 2 5 2 P 1 / 2 ) of 1.25 ( 9 ) × 10 32 cm 6 / s at 22 ° C .

© 2010 Optical Society of America

OCIS Codes
(020.2070) Atomic and molecular physics : Effects of collisions
(140.1340) Lasers and laser optics : Atomic gas lasers
(300.2530) Spectroscopy : Fluorescence, laser-induced
(300.6500) Spectroscopy : Spectroscopy, time-resolved

ToC Category:
Spectroscopy

History
Original Manuscript: March 29, 2010
Manuscript Accepted: May 11, 2010
Published: June 17, 2010

Citation
J. F. Sell, M. A. Gearba, B. M. Patterson, T. Genda, B. Naumann, and R. J. Knize, "Enhancement of Rb fine-structure transfer in 4He due to three-body collisions," Opt. Lett. 35, 2146-2148 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-13-2146

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