| OCR Text |
Show 25 momento transition In order for order it is necessary ,that the! electrons involved have either a common ground or common excited state orbitalo in the" former. case Term 2Q16a is certain , I interaction differed fhe.several clculations . . assumpions by - EYring20•21•22,23 and coworkerso .f applicable 0 Term 2016a has been evaluated under to choice the first to mix to th transition potentia. Vi.:r5' and the nature. of the wave functions used to describe the cromophoric group., Term 2016c has by Joneso27 been .evaluated Kirkwood and coworkers never attempted to evaluate term 2016b (the rotational strength for a singe' transition) but instead lated the line 0 The panding V term sum in a 1J is the multipole expansion . can in l/r be .. approximated by e,< o :: r. 1J [1 _ non-zero be written can as 3ftij vft 1J] .• 1 -. The first lJ dipole=dipole interactiqn term which T .;. calcu- of the contribution of all transitions t the Na D potential energy term, V,.,.J!, t .l:.!J .• as • r. 1J 1J BY'making a series of transformations involving the mean polarizability. a.P a.. 1 :'a.!l 1 + a2 1 of each group. + a3 .l one • can and the anisotropy ratio, 8i - 1 a.!l 1 = a.. 1 , express the molecular rotation at the Na D |
