Laser Frequency-Modulated Spectroscopy of a Laser-Guided Plasma in Sodium Vapor: Line Positions for NaH (Α1Σ+ - Χ1Σ+), Na (9-13d and 11-14s), and Ar (5p-4s)

J. T. Bahns, C. C. Tsai, B. Ji, J. T. Kim, G. Zhao, W. C. Stwalley, J. C. Bloch, R. W. Field

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Abstract

Laser frequency-modulated (FM) spectroscopy has been used as an axial probe of a laser-guided electric discharge in sodium-argon vapor contained in an optically accessible metal heat pipe oven. Absorption measurements in the region 23 106-23 881 cm-1 provided accurate line positions (±<0.006 cm-1) for 141 transitions in the ν′ = 3-8 ← ν″ = 0 and ν′ = 5-9 ← ν″ = 1 bands of NaH (Α1Σ+ - Χ1Σ+). In addition, 18 transitions of Na (3p to 9-13d and 11-14s) and 10 of argon (5p-4s) were measured. Analysis of the spectrum indicates that perhaps all absorption signals are due to neutrals NaH, Na, and Ar and are observed via "population" modulation.

Original languageEnglish
Pages (from-to)222-229
Number of pages8
JournalJournal of molecular spectroscopy
Volume186
Issue number2
DOIs
Publication statusPublished - 1997 Dec

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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