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Volume 15, Issue 2 (Summer-Fall 2021)
IJOP 2021, 15(2): 227-236 |
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Enenche P, David M, Alenoghena C, Okoh S. Combined Effects of Temperature and Optical Path-Length on Ozone Gas Absorption Cross Section at 257.34nm and 279.95nm in Relation to Green Communications. IJOP 2021; 15 (2) :227-236
URL: http://ijop.ir/article-1-475-en.html
URL: http://ijop.ir/article-1-475-en.html
1- Department of Telecommunication Engineering, Federal University of Technology Minna, Nigeria.
Abstract: (1382 Views)
The value of ozone absorption cross section (OACS) is a key parameter used in the configuration of gas sensors. Sadly, the variations of certain parameters among others such as temperature, pressure, and optical path-length in a given spectrum can affect the values of OACS. As a result, there have been several discrepancies in the value of OACS. Recently, the simultaneous effects of optical path-length were investigated in the visible spectrum. Hence, there is the need to also carry out the same investigation in the UV spectrum. So, in this paper, we have reported the combined variation effects of temperature (100 K–350 K), and optical path-length (0.75 cm–130 cm) on OACS in the UV spectrum. We used the method of optical absorption spectroscopy as deployed in a model software called Spectralcalc. The software comprising the HITRAN12 latest line list was used to simulate OACS values. Simulated results were obtained using the latest available line list on the HITRAN12 Spectralcalc simulator. Our obtained results were slightly different from those reported for the visible spectrum but followed a similar trend, in that it showed a decrease in the OACS with an increase in the temperature from 100 K to 350 K at 279.95 nm and 257.34 nm by 1.09 % and 1.43 % respectively. While optical path-length had zero effect on it. We, therefore, conclude that at constant pressure, OACS depends on both temperature and absorption wavelength but not on optical path-length. The analysis reported in this work only seeks to address the differences in the OACS relative to temperature in the UV spectrum. So, the results obtained in this paper can be used to optimally configure ozone gas sensors to obtain an accurate measurement.
Keywords: Absorption cross section, absorption spectroscopy, optical path-length, ozone gas, temperature, UV.
Type of Study: Research |
Subject:
Atmospheric Optics and Remote Sensing
Received: 2021/11/24 | Revised: 2022/06/9 | Accepted: 2022/06/18 | Published: 2022/06/22
Received: 2021/11/24 | Revised: 2022/06/9 | Accepted: 2022/06/18 | Published: 2022/06/22
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