HIGH-RESOLUTION SPECTROSCOPIC STUDY OF THE (310)LOCAL MODE-COMBINATION BAND SYSTEM OF ASH3

The high-resolution spectra of AsH3 in the 8130 - 8340 cm(-1) region, which were assigned to the (310;A(1)), and (310; E-1), and the (310; E -2) local mode combination bands, have been recorded at a resolution o f 0.01 cm(-1) and rotationally analyzed. The spectroscopic parameters were obtained by least-squares fitting. The rotational energy levels w ere fitted for the (310; A(1)) state (21 levels in all) up to J = 5, f or the (310; E-2) state (43 levels in all) up to J = 7, and for the (3 10; E-1) state (43 levels in all) up to J = 5. The complication of the rotational structure indicates rotational perturbation. (C) 1998 Acad emic Press.