首页>
外文期刊>journal of chemical physics
>The temperature dependence of rsquo;rsquo;single collisionrsquo;rsquo; bimolecular beamndash;gas chemiluminescent reactions. I. Theory
【24h】
The temperature dependence of rsquo;rsquo;single collisionrsquo;rsquo; bimolecular beamndash;gas chemiluminescent reactions. I. Theory
展开▼
机译：The temperature dependence of rsquo;rsquo;single collisionrsquo;rsquo; bimolecular beamndash;gas chemiluminescent reactions. I. Theory
We consider a rsquo;rsquo;single collisionrsquo;rsquo; bimolecular beamndash;gas chemiluminescent reaction in which a metal beam formed effusively intersects a tenuous atmosphere of oxidant gas (10minus;4to 10minus;6torr) resulting in the emission of visible radiation from excited electronic states of the reaction products. The kinetics of this beamndash;gas chemiluminescent reaction are studied in order to derive the relationship between the chemiluminescent intensity and the parameters of the beamndash;gas reaction. A formula is derived which relates the relative single collision chemiluminescent intensity to reactant mass and temperature, the enthalpy of vaporization or sublimation of the (metal) beam source material (Dgr;Hsub, Dgr;Hvap), and the Arrhenius activation energy (Eexp) for formation of products in particular, chemiluminescing, excited electronic states. The determination of the temperature dependence of the observed chemiluminescence provides an upper bound to Dgr;Hvaporization (Dgr;Hsub). If Dgr;His accurately known through independent studies, and heat capacity data is available,Eexpmay be evaluated. The significance ofEexpdetermined from chemiluminescence experiments is considered for metal beams with and without thermally populated internal states.
展开▼
