30 50         # first data record, number of data records
Reference: JPL Publication 97-4
           Chemical Kinetics and Photochemical Data for Use in Stratospheric
           Modeling
           Evaluation Number 12
           January 15, 1997
           page 208 ff.

CF2ClBr (Halon-1211) + hv -> Products

"The preferred absorption cross sections at 298 K, listed in Table 59, are the
mean of the values reported by Gillotay and Simon [201] at 2 nm intervals and
Burkholder et al. [40] at 1 nm intervals.  Molina et al. [208], Giolando
et al. [106], and Orkin and Kasimovskaya have also measured the cross sections 
at 5 nm and 10 nm intervals, respectively.  The agreement among all these 
studies is quite good.

The temperature dependence of the cross sections has been measured by Gillotay
and Simon as well as Burkholder et al.  The agreement between the two
studies is poor.  We have not evaluated the temperature dependence of the cross
section and the readers are referred to the original publications for this
information.  Orkin and Kasimovskaya measured the cross ssections in the
wavelength range 190-320 nm, at 295 K; their results agree with the
recommendation."

Table 59.  Absorption Cross Sections of CF2ClBr
--------------------------------------------------------------------------
lambda (nm)		1E20 sigma (cm^2)
--------------------------------------------------------------------------
190			47
192			58
194			70
196			83
198			96
200			112
202			118
204			121
206			122
208			121
210			117
212			112
214			106
216			98
218			90
220			81
222			72
224			64
226			56
228			49
230			42
232			36
234			31
236			26
238			22
240			18
242			15
244			12
246			10
248			8.0
250			6.5
252			5.1
254			4.0
256			3.2
258			2.4
260			1.9
262			1.4
264			1.1
266			0.84
268			0.63
270			0.48
272			0.36
274			0.27
276			0.20
278			0.15
280			0.1
282			0.079
284			0.058
286			0.043
288			0.031