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Type: Artigo
Title: Laser spectroscopy of calcium in hollow-cathode discharges
Author: Cavasso-Filho, R. L.
Mirage, A.
Scalabrin, A.
Pereira, D.
Cruz, F. C.
Abstract: We investigated the use of hollow-cathode discharges for high-resolution and high-sensitivity spectroscopy, using atomic calcium. Spectra with sub-Doppler resolution of Cai transitions at 423 (resonant), 610, 612, 616, 645, 657 (intercombination), and 672 mn were obtained by optogalvanic saturation spectroscopy in lamps filled with argon (0.6 and 2.5 Torr) and krypton (0.6 Torr). A Doppler background that is due to velocity-changing collisions, which may severely limit the resolution, can be greatly reduced by the choice of buffer gas. Sub-Doppler linewidths comparable with those achieved in atomic beams have been obtained, making a properly chosen hollow-cathode lamp a convenient tool for high-resolution spectroscopic experiments, providing wavelength references for laser frequency tuning. The sensitivity of optogalvanic detection and the excitation of most electronic levels by the discharge make these lamps attractive also for investigating weak and excited level transitions with the use of a simple experimental setup.
Subject: Feixes atômicos
Espectroscopia optogalvânica
Freqüência padrão
Colisões (Fisica)
Country: Estados Unidos
Editor: Optical Society of America
Citation: Journal Of The Optical Society Of America B-optical Physics. Optical Soc Amer, v. 18, n. 12, n. 1922, n. 1927, 2001.
Rights: fechado
Identifier DOI: 10.1364/JOSAB.18.001922
Date Issue: 2001
Appears in Collections:IFGW - Artigos e Outros Documentos

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