Line intensities of the phosphine dyad at 10 μm

Over 1000 measured line intensities of phosphine (PH3) are reported for the region 830 to 1310 cm(-1), which contains the two lowest fundamentals in Coriolis interaction. These measurements are fitted to 1.5% for nu(2) at 992.13 cm(-1) and 2.1 % for nu(4) at 1118.31 cm(-1), respectively, using five intensity parameters that include three Herman-Wallis type terms. In addition, some 60 intensities of the 2nu(2) - nu(2) hot band are modeled. The corresponding assignments and line positions of the dyad from previous work [L. Fusina and G. Di Lonardo, J. Mol. Struct. 517-518, 67-78 (2000)] are combined with the present intensity study to provide an improved PH3 database for planetary studies. The total integrated intensity for the dyad is 156.(4) cm(-2) atm(-1) at 296 K. (C) 2002 Elsevier Science (USA).