Concurrent Upshot of Optical Path-length and Pressure at 603nm and 575nm on Ozone Absorption Cross Section in Relation to Green Communication

Michael David

Abstract


Ozone gas is a greenhouse gas. Accurate measurement of its concentration is dependent on the right value of ozone gas absorption cross section. In the literature, discrepancies and inconsistencies has been however linked with ozone gas absorption cross section. HITRAN 2012, available on spectralcalc.com simulator was used in simulating ozone gas absorption cross section to determine the simultaneous effect of optical path length and pressure at two peak wavelengths in the visible spectrum. Simulation outcomes obtained for optical path length of 10 cm to 120 cm show that optimum absorption cross section value of 5.1084 ×10-25 m2/molecule at 603 nm and 4.7182 ×10-25 m2/molecule at 575 nm for gas cells length between 10 cm and 120 cm is obtained at peak points. Pressure values at which ozone gas absorption cross section becomes a constant value of 5.1058×10-25 m2/molecule at 603 nm and 4.7158 ×10-25 m2/molecule at 575 nm is optical path length dependent. The percentage difference between 5.1084×10-25 m2/molecule and 5.1058 ×10-25 m2/molecule is 0.05% for all length of gas cells considered. Similarly, percentage difference between 4.7182×10-25 m2/molecule and 4.7158 ×10-25 m2/molecule is also 0.05% for all length of gas cells considered. The results are relevant for high accuracy and high precision ozone gas measurements.

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DOI: http://doi.org/10.11591/ijaas.v11.i2.pp%25p

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