Global reward state affects learning and activity in raphe nucleus and anterior insula in monkeys

202009 bcrcVersion of RecordPublishe

Calibration and Chemical Kinetics Modeling of an OH Chemiluminesence Diagnostic

Existing shock-tube data from H2/O2/Ar mixtures were used to examine the chemical kinetics of OH* A2Σ+-X2Π chemiluminescence in the temperature range from 1010-1750 K. Using a detailed kinetics model of the well-known H2/O2 chemistry with an appropriate OH* subset of reactions, the kinetics of OH* formation, depletion, and chemiluminescence were studied, and the relationship between OH and OH* was explored. In general, the initial rise times of OH and OH* coincide closely, but the OH* peaks slightly later and decays much faster than the ground state OH. The OH* formation is dominated by the key H + O2 = OH + O reaction, and the main source of OH* was modeled as H + O + M = OH* + M. Using the data of this study and the H2/O2 detailed mechanism, a new reaction rate coefficient for this key OH* formation reaction was determined. The overall model was used to calibrate the OH* chemiluminescence diagnostic for the measurement of absolute OH* concentrations. © 2003 by The Aerospace Corporation