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Laboratory
for Atomic, Molecular and Laser Spectroscopy |
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RESEARCH |
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GENERAL |
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Find more about |
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Laboratory for Atomic, Molecular and Laser Spectroscopy is
mainly involved in the experimental and theoretical analysis of infrared
laser field – molecule interactions in gases. Linear and nonlinear
phenomena are investigated within the frame of fundamental and applied
research. Pulsed photoacoustic spectroscopy is used as experimental
technique, together with TEA CO2 laser as a light source, for all
of these activities. |
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Linear phenomena |
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To
find out more about investigation of linear phenomena and some characteristic
results obtained in our laboratory click here |
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LINEAR
PHENOMENA |
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Investigation of linear phenomena in gas mixtures was
based on the main characteristics of pulsed photoacoustic spectroscopy
technique: sensitivity, selectivity and good temporal resolution. These
characteristics allow one to detect very low concentration and differentiate
variety of different species present in a multicomponent gas mixture with
good temporal resolution of the photoacoustic signal, and on-line monitoring. |
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Nonlinear phenomena |
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The
results of multiphoton investigation in different gas mixtures, together with
collisional influence analysis, are here |
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NONLINEAR
PHENOMENA |
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Laser characteristics |
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Investigation of nonlinear phenomena, mainly multiphoton
absorption of polyatomic molecules, was based on analysis and calculation of
the most important physical parameters of polyatomic molecules, such as:
absorption cross-section, mean number of absorbed photons per one molecule
together with bulk relaxation times characterized by vibrational to
translational and rotational relaxation processes. |
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Publications |
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RELAXATION
PROCESSES |
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These and other relaxation processes, so called collisionally
induced processes, and their influence on the absorption characteristics of
polyatomic absorbers are investigated also, specially the influence of
nonabsorbing partners (buffer gases) in specific gas mixtures. All that analysis, specially with green house gases, are
of a great concern within the frame of environmental studies. |
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