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High-resolution study of some doubly excited vibrational states of PH2D: the ν1+ν2, ν2+ν5, ν2+ν3, and ν2+ν6 bands |
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| Authors: | ON Ulenikov ES Bekhtereva H Bürger C Leroy |
| Institution: | a Laboratory of Molecular Spectroscopy, Physics Department, Tomsk State University, Tomsk 634050, Russia b Anorganische Chemie, FBC, Bergische Universität, D-42097 Wuppertal, Germany c Laboratoire de physique, UMR CNRS 5027, Université de Bourgogne, 9 Avenue A. Savary, B.P. 47 870, F-21078 Dijon, France |
| Abstract: | The absorption bands ν1+ν2, ν2+ν3, and ν2+ν6 of PH2D have been recorded for the first time using a high-resolution Bruker 120 HR interferometer, and rotationally analyzed. Some transitions belonging to the very weak band ν2+ν5 and enhanced in intensity by strong interactions with the ν1+ν2 band were also assigned. Sets of parameters obtained from the fit reproduce experimental line position of the bands ν1+ν2 and ν2+ν3 with about the experimental accuracy. The residuals of the ro-vibrational energies of the ν2+ν6 band are about 10 times larger. Reasons for the poorer reproduction of the latter data are given. |
| Keywords: | Vibration-rotation spectra PH2D molecule Resonance interactions Spectroscopic parameters |
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