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.

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  6.38  3.15
210  4.07  6.28
215  4.93  6.75
220  4.06  5.70
225  2.81  3.81
230  2.62  3.83
235  1.28  2.17
240  0.876   1.96
245  0.233   1.62
250 -0.111  1.58
255 -1.03    0.606
260 -1.48   -0.0332
265 -1.09  1.2e-6
270 -0.54   -0.257
275  0.770  0.0299
280  2.01  0.110
285  3.85  0.926
290  5.47  1.65
295  7.00  2.52
300  8.56  4.11
305  9.31  4.89
310 10.56   6.87
315 10.83   6.81
320 11.98   9.76
325 12.98  11.30
330 14.56  17.50
335 18.81  24.60
340 13.90  9.08
345 18.86  22.1
350 20.19  20.1
355 -7.04  -40.5

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 -0.27
240 -0.40
245 -0.62
250 -0.79
255 -0.82
260 -0.75
265 -0.44
270  0.36
275  1.23
280  2.36
285  3.61
290  4.83
295  6.33
300  7.48
305  8.08
310  7.55
315  7.92
320  8.27
325  8.81
330  9.30
335 10.20
340 11.16
345 12.41
350 11.28
355 12.20