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Sulfur hexafluoride (SF6) is widely used in the electric and electronic industry. It is also an important green-house gas. The study of spectroscopy and structure of weakly bound complexes containing SF6 is helpful to gain a deep understanding on the intermolecular interactions between SF6 and other atoms or molecules. The rotationally resolved spectrum of the perpendicular vibrational band of 32SF6-Ar in the 32SF6 v3 band region was reported in a previous work but the rotational analysis was not completed. In this work, this vibrational band of 32SF6-Ar is reinvestigated. The jet-cooled rovibrational spectrum of SF6/Ar/He gas mixtures is measured by a continuous-wave distributed feed-back quantum cascade laser (DFB-QCL) in the 10.6 μm region with a segmented- rapid-scan data acquisition scheme. The gas mixtures (SF6:Ar:He = 0.12:1:100) are expanded into a cylinder vacuum chamber through a 0.8 mm pin-hole nozzle. The probe laser is reflected about 90 times by a pair of astigmatic mirrors inside the chamber. The observed spectrum is analyzed by the standard symmetric-top Hamiltonian with the program PGOPHER. When the resonance interaction between the l = ±1 levels in the double-degenerate excited vibrational state of 32SF6-Ar is considered, which was ignored in the previous study, a successful rotational analysis of the perpendicular vibrational band is achieved. The band-origin of the perpendicular band is determined to be v0 = 947.45300(58) cm-1 and the resonance interaction parameter is q = -0.002325(70) cm-1. A set of absorption lines close to the Q branch of the 32SF6 v3 band is tentatively assigned to the perpendicular vibrational band of 32SF6-34SF6 complex. This band is heavily overlapped by the monomer lines so that very few lines could be assigned. The band-origin of this band is estimated to be 948.1181(12) cm-1. These results will be useful for developing highly accurate intermolecular potential energy surfaces for SF6-Ar complex and SF6 dimer in the future.
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[1] Makarov G N 2005 Physics-Uspekhi 48 37
[2] Zellweger J M, Philippoz J M, Melinon P, Monot, van den Bergh H 1984 Phys. Rev. Lett. 52 522
[3] Eerkens J W 1998 Laser and Particle Beams 16 295
[4] Makarov G N 2015 Physics-Uspekhi 58 670
[5] Li Y G, Guo J, Ma J P, Tang X, Li X, Yan B 2022 Acta Phys. Sin. 71 243401 (in Chinese) [李业军, 郭静, 马俊平, 唐显, 李鑫, 闫冰 2022 物理学报 71 243401]
[6] Geraedts J, Setiadi S, Stolte S, Reuss J 1981 Chem. Phys. Lett. 78 277
[7] Geraedts J, Stolte S, Reuss J 1982 Zeit. Phys. A 304 167
[8] Urban R D, Takami M 1995 J. Chem. Phys. 103 9132
[9] Asselin P, Potapov A, Turner A C, Boudon V, Bruel L, Gaveau M A, Mons M 2017 Phy. Chem. Chem. Phys. 19 17224
[10] Kolomiitsova T D, Mielke Z, Shchepkin D N, Tokhadze K G 2002 Chem. Phys. Lett. 357 181
[11] Tokhadze I K, Kolomiitsova T D, Shchepkin D N, Tokhadze K G, Mielke Z 2009 J. Phys. Chem. A 113 6334
[12] van Bladel J W I, van der Avoird A 1990 J. Chem. Phys. 92 2837
[13] Vazhappilly T, Marjolin A, Jordan K J 2016 J. Phys. Chem. B 120 1788
[14] Hartmann M, Miller R E, Toennies J P, Vilesov A F 1996 Science 272 1631
[15] Asselin P, Turner A C, Bruel L, Brenner V, Gaveau M A, Mons M 2018 Phy. Chem. Chem. Phys. 20 28105
[16] Luo W, Zhang Y L, Li W G, Duan C X 2017 J. Mol. Spectrosc. 334 22
[17] Yuan H R, Liu T, Zhu T X, Liu Y, Li X, Chen Y, Duan C X 2023 Acta Phys. Sin. 72 063301 (in Chinese) [袁洪瑞, 刘涛, 朱天鑫, 刘云, 李响, 陈杨, 段传喜 2023 物理学报 72 063301]
[18] Liu Y, Li X, Qing T, Duan C X 2025 J. Phys. Chem. A 129 2259
[19] Gordon I E, Rothman L S, Hargreaves R J et al. 2022 J. Quant. Spectrosc. Radiat. Transfer 277 107949
[20] Western C M 2017 J. Quant. Spectrosc. Radiat. Transfer. 186 221
[21] Suas-David N, Kulkarni V, Benidar A, Kassi S, Georges R 2016 Chem. Phys. Lett. 659 209
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