| COMMENTS: | JPL-2010 recommendation, adopting the earlier recommendations of
S.P. Sander, R.R. Friedl, D.M. Golden, M.J. Kurylo, R.E. Huie, V.L. Orkin, G.K. Moortgat, A.R. Ravishankara, C.E. Kolb, M.J. Molina, and B.J. Finlayson-Pitts, “Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies. Evaluation Number 14“, JPL Publication 02-25, Jet Propulsion Laboratory, Pasadena, 2002; http://jpldataeval.jpl.nasa.gov/ , and
S.P. Sander, R.R. Friedl, D.M. Golden, M.J. Kurylo, G.K. Moortgat, H. Keller-Rudek, P.H. Wine, A.R. Ravishankara, C.E. Kolb, M.J. Molina, B.J. Finlayson-Pitts, R.E. Huie, V.L. Orkin, “Chemical Kinetics and Photochemical Data for Use in Atmospheric Studies. Evaluation Number 15“, JPL Publication 06-2, Jet Propulsion Laboratory, Pasadena, 2006; http://jpldataeval.jpl.nasa.gov/ :
Absorption cross sections σ: 205-230 nm, data of C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, and P.J. Crutzen, "Temperature dependence of UV absorption cross sections and atmospheric implications of several alkyl iodides," J. Geophys. Res. 102(D11), 12819-12829 (1997); DOI: 10.1029/97JD00530, 235-355 nm, mean of the data of C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, and P.J. Crutzen, "Temperature dependence of UV absorption cross sections and atmospheric implications of several alkyl iodides," J. Geophys. Res. 102(D11), 12819-12829 (1997); DOI: 10.1029/97JD00530, and O.V. Rattigan, D.E. Shallcross, and R.A. Cox, "UV absorption cross-sections and atmospheric photolysis rates of CF3I, CH3I, C2H5I and CH2ICl," J. Chem. Soc. Faraday Trans. 93, 2839-2846 (1997); DOI: 10.1039/A701529A, 360-390 nm, data of O.V. Rattigan, D.E. Shallcross, and R.A. Cox, "UV absorption cross-sections and atmospheric photolysis rates of CF3I, CH3I, C2H5I and CH2ICl," J. Chem. Soc. Faraday Trans. 93, 2839-2846 (1997); DOI: 10.1039/A701529A. Temperature coefficients a1 and a2: 223-298 K, C.M. Roehl, J.B. Burkholder, G.K. Moortgat, A.R. Ravishankara, and P.J. Crutzen, "Temperature dependence of UV absorption cross sections and atmospheric implications of several alkyl iodides," J. Geophys. Res. 102(D11), 12819-12829 (1997); DOI: 10.1029/97JD00530, σ(λ, T) = σ(298 K) [1 + a1(T-298) + a2(T-298)2] with -------------------------------
λ 103 a1 105 a2
(nm) (K-1) (K-2)
-------------------------------
205 -1.59 -3.83
210 8.47 3.76
215 6.12 4.30
220 0.232 0.13
225 -0.0938 0.660
230 -0.268 -1.4e-6
235 -0.512 -0.388
240 -0.793 -0.664
245 -0.929 -0.758
250 -1.22 -1.13
255 -1.25 -1.00
260 -1.56 -1.14
265 -1.05 -0.294
270 -1.33 -0.593
275 -1.07 -0.298
280 -0.618 -0.309
285 -0.326 -0.554
290 0.300 -0.711
295 1.55 -0.245
300 2.38 -0.0473
305 3.13 0.394
310 3.13 0.303
315 2.74 -0.317
320 2.44 -0.533
325 2.87 0.140
330 8.52 -4.21
335 2.02 -2.25
340 5.20 4.54
345 7.05 6.88
350 9.12 11.7
355 12.27 18.9
Temperature coefficients B: 243-333 K, O.V. Rattigan, D.E. Shallcross, and R.A. Cox, "UV absorption cross-sections and atmospheric photolysis rates of CF3I, CH3I, C2H5I and CH2ICl," J. Chem. Soc. Faraday Trans. 93, 2839-2846 (1997); DOI: 10.1039/A701529A, ln σ(λ, T) = ln σ(λ, 298 K) + B × (T - 298) with -----------------
λ 103 B
(nm) (K-1)
-----------------
235 0.24
240 0.12
245 -0.02
250 -0.11
255 -0.28
260 -0.44
265 -0.55
270 -0.59
275 -0.47
280 -0.18
285 0.32
290 0.99
295 1.73
300 2.56
305 3.08
310 3.50
315 3.56
320 3.46
325 3.44
330 3.72
335 4.09
340 4.87
345 5.69
350 6.88
355 8.16
360 9.01
365 11.06
370 11.47
375 12.77
380 15.14
385 19.12
390 20.48
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