25 16 # first data record, number of data records Reference: JPL Publication 94-26 Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling Evaluation Number 11 December 15, 1994 page 155 CHClF2 (HCFC-22) + hv -> Products "The absorption cross sections of CHClF2 (HCFC-22) have been measured at room temperature by Robbins and Stolarski [1332] and Chou et al. [300], at 208K and 218K by Hubrich et al. [713], and between 210 and 295 K by Simon et al. [1425]. The agreement between these groups is reasonable. The preferred absorption cross sections, listed in Table 46, are taken from work of Simon et al. Photolysis of CHClF2 is rather unimportant throughout the atmosphere: reaction with OH radicals is the dominant destruction process." Table 46. Absorption Cross Sections of CHClF2. --------------------------------------------------------------------------------------- lambda 1E20 sigma (cm^2) (nm) 295K 270K 250K 230K 210K --------------------------------------------------------------------------------------- 174 5.72 5.72 5.72 5.72 5.72 176 4.04 4.04 4.04 4.04 4.04 178 2.76 2.76 2.76 2.76 2.76 180 1.91 1.91 1.91 1.91 1.91 182 1.28 1.28 1.28 1.28 1.28 184 0.842 0.842 0.842 0.842 0.842 186 0.576 0.576 0.576 0.576 0.576 188 0.372 0.372 0.372 0.372 0.372 190 0.245 0.245 0.245 0.245 0.242 192 0.156 0.156 0.156 0.152 0.148 194 0.103 0.102 0.099 0.096 0.093 196 0.072 0.069 0.067 0.064 0.062 198 0.048 0.045 0.043 0.041 0.039 200 0.032 0.029 0.029 0.0259 0.0159 202 0.0220 0.0192 0.0184 0.0169 0.0159 204 0.0142 0.0121 0.0114 0.0104 0.0096