Precise measurement of pressure broadening parameters for water vapor with a terahertz time-domain spectrometer

Autor:	Iwao Hosako, Takamasa Seta, Chiko Otani, Hiromichi Hoshina, Toshiyuki Iwamoto, Yasuko Kasai
Rok vydání:	2008
Předmět:	Radiation Materials science Absorption spectroscopy Spectrometer Terahertz radiation business.industry Infrared spectroscopy Quantum number Atomic and Molecular Physics and Optics symbols.namesake Optics Fourier transform symbols Time domain Atomic physics business Spectroscopy Water vapor
Zdroj:	Journal of Quantitative Spectroscopy and Radiative Transfer. 109:2303-2314
ISSN:	0022-4073
DOI:	10.1016/j.jqsrt.2008.03.005
Popis:	The pressure broadening parameters g N2 and g O2 of pure rotational transitions of water vapor with nitrogen and oxygen as foreign gases, respectively, were measured with a terahertz time-domain spectrometer (THz-TDS) in the frequency region from 0.5 to 3.5 THz. A White-type multi-pass cell was introduced in the THz-TDS system to precisely measure the absorption spectra of water vapor. The parameters of 36 lines were determined for both N2 and O2, of which 25 parameters for gN2 and 28 parameters for gO2 were the first laboratory experimental data. The quantum number dependence of the parameters was experimentally observed for the first time due to the good signal-to-noise ratio of this system compared with the conventional Fourier transform infrared spectrometer (FT-IR) experiments. r 2008 Elsevier Ltd. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::10a9abd89bbaa01cf14b37ecb54eb2ee https://doi.org/10.1016/j.jqsrt.2008.03.005 Zobrazit plný text záznamu Full Text from ScienceDirect