Abstract book - Prof. Per Jensen, Ph.D. - Bergische Universität ...

152 Poster session, H39New Millimeter-Wave Measurements of the NH 3 –CO and NH 3 –N 2Molecular ComplexesAlexandr A. Dolgov 1 , Alexey Potapov 2 , Victor A. Panfilov 1 , Leonid A. Surin 1,2 ,Stephan Schlemmer 21 Institute of Spectroscopy RAS, Troitsk, Russia, dolgov.adonix@gmail.com;2 I. Physikalisches Institut, University of Cologne, Germany, surin@ph1.uni-koeln.deDolgov A.A.Potapov A.Panfilov V.A.Surin L.A.Schlemmer S.The pure rotational spectra of the isoelectronic van der Waals complexes, NH 3 –CO andNH 3 –N 2 , have been measured using the intracavity OROTRON jet spectrometer in thefrequency range of 112-139 GHz. For the NH 3 –CO complex observed and assignedtransitions belong to the R-branches with rotational J numbers from 5 to 19 of the K = 1– 0, K = 2 – 1, K = 0 – 0 and K = 1 – 1 subbands. These transitions are continuations tohigher J values of transition series correlating with the rotationless j NH3 = 0 state (Asymmetry)of free orthoNH 3 and j NH3 = 1 state (E-symmetry) of free paraNH 3 observedpreviously at lower frequencies. 1 For NH 3 –N 2 six new transitions were observedbelonging to different nuclear spin-modifications of the complex: orthoNH 3 –orthoN 2 ,orthoNH 3 –paraN 2 and paraNH 3 –orthoN 2 . The transitions involve the K = 0 and K = 1states and extend earlier millimeter-wave data 2 to higher J numbers.Both new data sets were analyzed together with known infrared, millimeter-wave andmicrowave transitions in order to determine the molecular parameters of the NH 3 –COcomplex in the both A and E states and NH 3 –N 2 complex for the case of orthoNH 3 –orthoN 2 modification. A comparison of derived parameters with those of the recentlystudied CH 4 –CO complex 3 is also presented.The authors acknowledge the Deutsche Forschungsgemeinschaft (Grants SU 579/1,SCHL 341/8) and the Russian Foundation for Basic Research (Grants 12-03-00985, 12-02-91337) for financial support.References[1] C. Xia, K.A. Walker, and A.R.W. Mckellar, Mol. Phys. 99, 643, 2001[2] K.A. Walker and A.R.W. Mckellar, Mol. Phys. 99, 1391, 2001[3] A.V. Potapov, A.A. Dolgov, V.A. Panfilov, L.A. Surin, S. Schlemmer,J. Mol. Spectrosc. 268, 112, 2011