HNO3 photolysis cross-sections (T dependent) Note: QY (HNO3 = NO2 + OH) is unity (IUPAC 2003) Burkholder et al., J. Geophys. Res., 98, 22,937, 1993 Recommended by IUPAC 2003 http://www.iupac-kinetic.ch.cam.ac.uk sigma(T) = A * exp(B*(T-298)) A is in (10^-20) cm2 wavelength (nm) A B sigma (298K) 186 1580 1.7 1.58E-17 188 1480 1.7 1.48E-17 190 1360 1.7 1.36E-17 192 1225 1.7 1.225E-17 194 1095 1.7 1.095E-17 196 940 1.7 9.4E-18 198 770 1.65 7.7E-18 200 588 1.66 5.88E-18 202 447 1.69 4.47E-18 204 328 1.74 3.28E-18 206 231 1.77 2.31E-18 208 156 1.85 1.56E-18 210 104 1.97 1.04E-18 212 67.5 2.08 6.75E-19 214 43.9 2.17 4.39E-19 216 29.2 2.17 2.92E-19 218 20 2.21 2E-19 220 14.9 2.15 1.49E-19 222 11.8 2.06 1.18E-19 224 9.61 1.96 9.61E-20 226 8.02 1.84 8.02E-20 228 6.82 1.78 6.82E-20 230 5.75 1.8 5.75E-20 232 4.87 1.86 4.87E-20 234 4.14 1.9 4.14E-20 236 3.36 1.97 3.36E-20 238 2.93 1.97 2.93E-20 240 2.58 1.97 2.58E-20 242 2.34 1.88 2.34E-20 244 2.16 1.75 2.16E-20 246 2.06 1.61 2.06E-20 248 2 1.44 2E-20 250 1.97 1.34 1.97E-20 252 1.96 1.23 1.96E-20 254 1.95 1.18 1.95E-20 256 1.95 1.14 1.95E-20 258 1.93 1.12 1.93E-20 260 1.91 1.14 1.91E-20 262 1.87 1.14 1.87E-20 264 1.83 1.18 1.83E-20 266 1.77 1.22 1.77E-20 268 1.7 1.25 1.7E-20 270 1.62 1.45 1.62E-20 272 1.53 1.49 1.53E-20 274 1.44 1.56 1.44E-20 276 1.33 1.64 1.33E-20 278 1.23 1.69 1.23E-20 280 1.12 1.78 1.12E-20 282 1.01 1.87 1.01E-20 284 0.909 1.94 9.09E-21 286 0.807 2.04 8.07E-21 288 0.709 2.15 7.09E-21 290 0.615 2.27 6.15E-21 292 0.532 2.38 5.32E-21 294 0.453 2.52 4.53E-21 296 0.381 2.7 3.81E-21 298 0.316 2.92 3.16E-21 300 0.263 3.1 2.63E-21 302 0.208 3.24 2.08E-21 304 0.167 3.52 1.67E-21 306 0.133 3.77 1.33E-21 308 0.105 3.91 1.05E-21 310 0.0814 4.23 8.14E-22 312 0.0628 4.7 6.28E-22 314 0.0468 5.15 4.68E-22 316 0.0362 5.25 3.62E-22 318 0.0271 5.74 2.71E-22 320 0.0197 6.45 1.97E-22 322 0.0154 6.7 1.54E-22 324 0.0108 7.16 1.08E-22 326 0.0082 7.55 8.2E-23 328 0.00613 8.16 6.13E-23 330 0.00431 9.75 4.31E-23 332 0.00319 9.93 3.19E-23 334 0.00243 9.6 2.43E-23 336 0.00196 10.5 1.96E-23 338 0.00142 10.8 1.42E-23 340 0.00103 11.8 1.03E-23 342 0.000861 11.8 8.61E-24 344 0.000694 9.3 6.94E-24 346 0.000501 12.1 5.01E-24 348 0.000415 11.9 4.15E-24 350 0.000417 9.3 4.17E-24