Experimental observation of the ��$_{2}$+4��$_{3}$ bands of HD$^{16}$O and HD$^{18}$O between 14975 and 15275 cm$^{-1}$
| العنوان: | Experimental observation of the ��$_{2}$+4��$_{3}$ bands of HD$^{16}$O and HD$^{18}$O between 14975 and 15275 cm$^{-1}$ |
|---|---|
| المؤلفون: | Chandran, S., Dixneuf, S., Orphal, J., Ruth, A.A. |
| بيانات النشر: | Elsevier, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | HD16O, Water isotopologues, Trace gas sensing, Overtone combination bands, Near infra-red, Fourier transform-incoherent broadband cavity enhanced absorption spectroscopy (FT-IBBCEAS), HD18O |
| الوصف: | The ��$_{2}$+4��$_{3}$ combination bands of HD$^{16}$O and HD$^{18}$O were measured using Fourier transform-incoherent broadband cavity-enhanced absorption spectroscopy (FT-IBBCEAS) with a spectral resolution of 0.08 cm$^{-1}$. The ro-vibrational lines of these bands were assigned through comparison with ab-initio molecular lines from the Tomsk variational calculation database (http://spectra.iao.ru/). For HD$^{18}$O and HD$^{16}$O in total 114 and 141 strong lines were assigned in the region between 14975.3 cm$^{-1}$ and 15243.3 cm$^{-1}$ and between 14998.5 cm$^{-1}$ and 15274.7 cm$^{-1}$, respectively. While the very satisfactory agreement of line intensities was used for line assignments, a systematic average discrepancy of ~0.305 cm$^{-1}$ in line positions was identified between the measured lines of HD$^{18}$O and the theoretically predicted lines from the Tomsk database. Similarly for HD$^{16}$O, an approximate wavenumber difference of ~0.361 cm$^{-1}$ was observed. The wavenumber accuracy of the Fourier transform cavity enhanced absorption spectrometer was confirmed on basis of concurrently measured H$_{2}$$^{16}$O spectra in the region between 15254.2 cm$^{-1}$ and 15376.9 cm$^{-1}$ and corroborated the systematic shifts of the ab initio data. A few lines of the ��$_{1}$+4��$_{2}$+2��$_{3}$ bands of HD$^{16}$O and HD$^{18}$O were also identified. The data are compared and discussed on basis of existing literature data. |
| اللغة: | English |
| DOI: | 10.5445/ir/1000130875 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::44361b652e744aacbb4f83badb52d513 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........44361b652e744aacbb4f83badb52d513 |
| قاعدة البيانات: | OpenAIRE |
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