The influence of hyperfine structure and isotope shift on the detection of Rb by 2f-wavelength modulation diode laser absorption spectrometry: experimental verification of simulations
1998 (English)In: Spectrochimica Acta Part B - Atomic Spectroscopy, ISSN 0584-8547, E-ISSN 0031-6987, Vol. 52, no 14, 1895-1905 p.Article in journal (Refereed) Published
This work presents an experimental verification of a previously developed methodology for simulation of the 2f-wavelength modulation diode laser absorption spectrometry technique (2f-WM-DLAS) when the influence of hyperfine structure, isotope shift and collisional broadening and shift of an atomic transition is taken into account [J. Gustafsson, D. Rojas and O. Axner, Spectrochim. Acta, 52B, 1937-1953 (1997)]. The pilot element in the simulations was Rb, detected at the 780 nm 5s S-2(1/2) - 5p P-2(3/2) transition, in low-pressure cells and atmospheric-pressure reservoirs (e.g. graphite furnaces). This experimental investigation verifies that the simulations are able to predict, with good accuracy, experimental 2f-WM signals from Rb atoms under both low-pressure, room-temperature conditions and atmospheric-pressure, high-temperature conditions. This implies that the previously published simulation methodology can be used for predicting and optimizing 2f-WM signal strengths and shapes from Rb atoms (and thereby presumably also from other atoms) under a variety of pressure and temperature conditions.
Place, publisher, year, edition, pages
Elsevier, 1998. Vol. 52, no 14, 1895-1905 p.
wavelength modulation, diode laser, 2f-WM-DLAS, hyperfine structure, isotope shift, rubidium, graphite furnace, experimental verification
IdentifiersURN: urn:nbn:se:umu:diva-4360DOI: 10.1016/S0584-8547(98)00200-6ISI: 000078122400004OAI: oai:DiVA.org:umu-4360DiVA: diva2:143413