Tsai, Po-YuPo-YuTsaiKING-CHUEN LIN2018-09-102018-09-102011http://www.scopus.com/inward/record.url?eid=2-s2.0-79955530591&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/364530The rotational energy transfer (RET) by Ar collisions within the SH X (2)Π (v'' = 0, J'' = 0.5-10.5) state is characterized. The integral cross sections as a function of collision energy for each rotational transition are calculated using a quantum scattering method in which the constructed potential energy functions are based on a ground state potential energy surface (PES) reported previously. On the other hand, a laser-induced excitation fluorescence technique is employed to monitor the relaxation of the rotational population as a function of photolysis-probe delay time following the photodissociation of H(2)S at 248 nm. The rotational population evolution is comparable to its theoretical counterpart based on calculated Λ-resolved RET rate constants. The propensity in Λ-resolved RET transitions is found to approximately resemble the case of OH(X (2)Π, v'' = 0) + Ar. The Λ-averaged RET collisions are also analyzed and result in several propensity rules in the transitions. Most propensity rules are similar to those observed in the collisions of SH(A (2)Σ(+)) by Ar. However, the behavior of the conserving ratio, defined as rate constants for spin-orbit conserving transition divided by those for spin-orbit changing transition, shows distinct difference from those described by Hund's case (b).[SDGs]SDG7journal article10.1039/c0cp01882a2-s2.0-79955530591