Moraes, João Carlos Silos [UNESP]Pereira, D.Carelli, G.Moretti, A.Strumia, F.2014-05-202014-05-201996-06-01Infrared Physics & Technology. Oxford: Pergamon-Elsevier B.V., v. 37, n. 4, p. 547-551, 1996.1350-4495http://hdl.handle.net/11449/32429We present the results of an intracavity Stark spectroscopy experiment on the fundamental state of (CD3OH)-C-13. We use an optically pumped hybrid waveguide FIR laser, CH2F2 as active molecule, and (CD3OH)-C-13 as absorbent molecule. No Brewster window is needed to separate the lasing gas from the absorbing deuterated methanol. An absorption line is assigned as E(l) symmetry (n, K, J): (1,4,18) --> (1,5,18) and its frequency is measured as 63.08631 cm(-1) with a precision of a few parts in 10(7); two more absorptions are reported and a tentative assignment for one of them.547-551engArtigo10.1016/S1350-4495(95)00084-4WOS:A1996UR65100019Acesso restrito