A SUPERSONIC MOLECULAR-BEAM OPTICAL STARK STUDY OF CAOH AND SROH

The permanent electric dipole moments of CaOH and SrOH in their X(2)SIGMA+, A(2)PI(3/2), A(2)PI(1/2), and B(2)SIGMA+ states have been measured using the technique of supersonic molecular beam optical Stark spectroscopy. For CaOH the values obtained were-mu-(X(2)SIGMA+) = 1.465(61)D, mu-(A(2)PI 1/2) = 0.836(32)D, mu-(A(2)PI 3/2) = 0.766(24)D, and mu(B(2)SIGMA+) = 0.744(84)D, while for SrOH the values were mu-(X(2)SIGMA+) = 1.900(14)D, mu-(A(2)PI 1/2) = 0.590(45)D, mu-(A(2)PI 3/2) = 0.424(5)D, and mu-(B(2)SIGMA+) = 0.396(61)D. The results are compared with values from a recent ab initio calculation for CaOH and with the predictions of a semiempirical electrostatic polarization model.