Sub-Doppler diode laser saturated absorption spectroscopy of barium in a low-pressure graphite furnace

Journal Article · Tue Sep 01 04:00:00 EDT 1998 · Applied Spectroscopy

DOI:https://doi.org/10.1366/0003702981945183· OSTI ID:675111

Lipert, R J ^[1]

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1. Microanalytical Instrumentation Center and Ames Laboratory--USDOE, Iowa State University, Ames, Iowa 50011-3020 (United States)

As a first step toward developing an optical isotope abundance measurement technique, sub-Doppler saturated absorption spectroscopy has been demonstrated by using a scanning diode laser as a tunable light source and a low-pressure graphite furnace for sample atomization. Spectral linewidths were reduced by a factor of 49 from the pressure-broadened, Doppler-limited value of 2.8 GHz to 57 MHz. This reduction in linewidths was accompanied by a 60-fold increase in detection limits, mainly due to increased loss of analyte through rapid diffusion at the low pressure used to minimize collisional broadening. Some residual homogeneous broadening was observed, which is primarily attributed to laser power broadening. {copyright} {ital 1998} {ital Society for Applied Spectroscopy}

• OSTI ID: 675111
• Journal Information: Applied Spectroscopy, Journal Name: Applied Spectroscopy Journal Issue: 9 Vol. 52; ISSN APSPA4; ISSN 0003-7028
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
56 BIOLOGY AND MEDICINE
APPLIED STUDIES
ABSORPTION
ABSORPTION SPECTROSCOPY
BARIUM
CHEMICAL ANALYSIS
DOPPLER EFFECT
ISOTOPE RATIO
LASER SPECTROSCOPY
RADIOACTIVE WASTES
SEMICONDUCTOR LASERS
VISIBLE SPECTRA