Table of Contents
International Journal of Spectroscopy
Volume 2010, Article ID 704183, 7 pages
http://dx.doi.org/10.1155/2010/704183
Research Article

Measurement of the ๐Ÿ– ๐Ÿ• R b [ ๐Ÿ“ P ๐Ÿ‘ / ๐Ÿ ( ๐น โ€ฒ = ๐Ÿ‘ ) โˆ’ ๐Ÿ“ S ๐Ÿ / ๐Ÿ ( ๐น = ๐Ÿ ) ] Effective Nonradiative Relaxation Rate near a Metallic Film

1Department of Physics, Xinjiang University, Urumqi 830046, China
2School of Science, Xi'an Jiaotong University, Xi'an 710049, China

Received 30 March 2010; Revised 20 May 2010; Accepted 2 July 2010

Academic Editor: Wei Kong

Copyright © 2010 Jing Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We have studied the effective nonradiative relaxation rate of the hyperfine level 8 7 R b [ 5 P 3 / 2 ( ๐น ๎…ž = 3 ) ] near a metallic film with diode laser-induced retrofluorescence spectroscopy and saturated-absorption spectroscopy technique. The glass-vapor interface is considered as two distinct regions, a wavelength-thickness vapor layer joined to the surface and a more remote vapor region. The total experimental retrofluorescence signal ๐‘† o b ( ๐œˆ ๐ฟ ) is the summation of the signal originating from the far-field region ๐‘† ๐‘‡ ( ๐œˆ ๐ฟ ) and the signal originating from the near-field region ๐‘  ๐‘› ( ๐œˆ ๐ฟ ) . Considering the thermalization of 8 7 R b ( 5 P 3 / 2 ) atoms in the far-field region, we can approximate ๐‘† ๐‘‡ ( ๐œˆ ๐ฟ ) by using the vertical fluorescence signal near the entrance window. Thus we get the experimental hyperfine signal profile of 8 7 R b in the near-field region. The value of the effective nonradiative transfer rate ๐ด ๐น ๐‘› ๐‘“ โ€ฒ = 3 โ†’ ๐น = 2 = 2 . 3 ร— 1 0 8 s โˆ’ 1 near the metallic film is relatively large compared to the spontaneous emission rate ๐ด ๐น โ€ฒ = 3 โ†’ ๐น = 2 = 1 . 1 ร— 1 0 7 s โˆ’ 1