Diffusion processes and atomic collisions of Na-rare gas systems studied by laser induced population grating method

K. Yamada, Y. Fukuda, T. Hashi

Research output: Contribution to journalArticle

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Abstract

Diffusion processes and atomic collisions of Na-He and Na-Ar systems have been studied by measurement of the time development of population gratings (Laser-Induced Population Grating; LIPG) induced in atomic levels by two intersecting resonant laser pulses and monitored through the Bragg diffraction of a probe laser beam. The diffusion process in the systems was observed through the decay of the LIPGs in the sodium ground-state (32S 1 2) sublevels. The pressure dependence of the diffusion constants were measured. The values showed rough agreement with the previously reported values which had been measured indirectly by the optical-pumping method. The gaussian process model and a simple collision kernel model were considered for the diffusion process. It was also found that with increasing buffer-gas pressure, the population gratings in the excited state 3 2P 1 2 were transferred to 3 2P 1 2, which was interpreted as an effect of fine-structure state-changing collisions.

Original languageEnglish
Pages (from-to)403-408
Number of pages6
JournalOptics Communications
Volume63
Issue number6
DOIs
Publication statusPublished - 1987 Sep 15

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Noble Gases
atomic collisions
Inert gases
rare gases
gratings
collisions
Lasers
lasers
Optical pumping
optical pumping
Excited states
pressure dependence
Ground state
gas pressure
Laser beams
Laser pulses
Buffers
buffers
Diffraction
Gases

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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Diffusion processes and atomic collisions of Na-rare gas systems studied by laser induced population grating method. / Yamada, K.; Fukuda, Y.; Hashi, T.

In: Optics Communications, Vol. 63, No. 6, 15.09.1987, p. 403-408.

Research output: Contribution to journalArticle

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