Quenching of highly vibrationally excited pyrimidine by collisions with CO2

摘要: Relaxation of highly vibrationally excited pyrimidine (C4N2H4) by collisions with carbon dioxide has been investigated using diode laser transient absorption spectroscopy. Vibrationally hot (E′=40635cm−1) was prepared 248‐nm excimer excitation, followed rapid radiationless relaxation to the ground electronic state. The nascent rotational population distribution (J=58–80) 0000 state CO2 resulting from probed at short times following pulse. Doppler spectroscopy used measure recoil velocity for J=58–80 Rate constants and probabilities populating these states were determined. measured energy transfer probabilities, indexed final bath state, resorted as a function ΔE create function, P(E,E′), E′−E∼1300–7000cm−1. P(E,E′) is fitted single exponential biexponential det...