Far-infrared spectrum of sodium hydride |
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| Institution: | 1. Key Laboratory for Bionic Engineering of Ministry of Education, Jilin University, Changchun 130025, People''s Republic of China;2. State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, People''s Republic of China;1. Faculty of Engineering and Informatics, Universitas PGRI Semarang, Jl. Sidodadi Timur No. 24 Semarang, Central Java 50125, Indonesia;2. Faculty of Pharmacy, Universitas Setia Budi, Jl. Letjend Sutoyo Mojosongo, Surakarta, Central Java 57127, Indonesia;3. School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, No. 2 Chongwen Road, Nan''an District, Chongqing 400065,PR China;4. Independent Researcher, 925 Dalney St NW Atlanta, GA 30318, United States;5. School of Science, Kwansei Gakuin University, 2-1 Gakuen Sanda, Hyogo 669-1337, Japan;1. Indian Institute of Space Science and Technology, Thiruvananthapuram, 695547, Kerala, India;2. Government College, Karyavattom, University of Kerala, Thiruvananthapuram, 695581, Kerala, India;1. Key Laboratory of High-temperature and High-pressure Study of the Earth’s Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China;2. University of Chinese Academy of Sciences, Beijing 100049, China;1. School of Chemical Sciences, Universiti Sains Malaysia, 11800, Minden, Penang, Malaysia;2. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China;3. University of Chinese Academy of Sciences, Beijing, 100049, China;4. New Energy Department, Research Institute of Petroleum Exploration & Development, China National Petroleum Corporation, China;1. Laboratory for Synthetic and Structural Inorganic Chemistry – Bioinorganic and Metallodrugs. Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil;2. Department of Exact and Technological Sciences, State University of Santa Cruz, Rod. Jorge Amado, Km 16, 45662-900 Ilhéus, BA, Brazil;3. Catalysis and Transfer Phase Laboratory, Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo, Av. Prof. Lineu Prestes, 748, 05508-000 São Paulo, SP, Brazil;4. Department of Chemistry, Federal University of São Carlos, CP 676, 13565-905 São Carlos, SP, Brazil;5. Department of Immunology, Laboratory of Tumor Immunology, Institute of Biomedical Sciences, University of São Paulo, Av. Prof. Lineu Prestes, 1730, 05508-000 São Paulo, SP, Brazil;6. Department of Chemistry and Molecular Physics, São Carlos Chemistry Institute, University of São Paulo, Av. Trabalhador São Carlense, 400, 13566-590 São Carlos, SP, Brazil |
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| Abstract: | Rotational spectra in the v = 0, 1, 2, and 3 levels of the ground (1Σ) state of sodium hydride have been observed using tunable far-infrared radiation generated from the difference frequency between two CO2 lasers. The Dunham coefficients, which have been determined without the use of optical data or isotopic scaling relations, are Y01 = 146 999.138(38) MHz, Y02 = −10.29481(54) MHz, Y03 = 6.243(49) × 10−4 MHz, Y11 = −4109.912(68) MHz, Y12 = 0.14695(68) MHz, Y21 = 33.341(34) MHz, Y22 = −2.69(20) × 10−3 MHz, and Y31 = −1.0517(55) MHz. The constants are typically an order of magnitude more accurate than the best values previously available, and where comparison is possible, agreement is found to be excellent. |
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