STUDY ON THE QUENCHING FOR PCL(B(1)SIGMA( -V MODEL()) BY E)

Using the reaction of Ar(P-3(0,2)) + PCl3 as a source of PCl(b(1) Sigm a(+)), we have measured the quenching rate constants of PCl(b, upsilon ' = 0) for more than 20 quenchers. The E-V model is used to calculate the rate constants. Comparison of the calculated values with the exper imental ones shows that the quenching of PCl(b) by the quencher molecu les results from the electronic-to-vibrational energy resonant transfe r and has relations to the Franck-Condon factors for the PCl(b, v' = 0 --> a, upsilon '' = m) transition: and the anharmonicities of the ter minal bonds of the quencher molecules. In addition, the influence of t he polarizability on the quenching rate constants is discussed.