BrO -> Br + O. The BrO radical has a banded spectrum in the 290¨C380 nm range. 
The strongest absorption feature is around 338 nm. The measured cross sections 
are both temperature- and resolution dependent. As an example, the spectrum 
measured by Wahner et al. [423] is shown in Figure 4-4. The bands are due to a 
vibrational progression in the A <- X system, and the location of the bands, 
along with the assignments and cross sections measured using 0.4 nm resolution, 
are shown in Table 4-62. BrO is expected to dissociate upon light absorption. 
As a guide, the cross sections averaged over 5 nm wavelength intervals are taken 
from the work of Cox et al. [92], and are listed in Table 4-63. These authors 
estimate a BrO lifetime against atmospheric photodissociation of ~20 seconds at 
the earth's surface, for a solar zenith angle of 30 deg. The earlier BrO cross 
section measurements were carried out mostly around 338 nm, and these have been
reviewed by CODATA ([81,82]).
wlow   wupper   xs, 1e-20 cm2
300	305	200
305	310	259
310	315	454
315	320	391
320	325	600
325	330	753
330	335	628
335	340	589
340	345	515
345	350	399
350	355	228
355	360	172
360	365	161
365	370	92
370	375	51