wavel.	cross sect.	10^3 B
(nm)	(cm2 molec.-1)	(K^-1)
------------------------------
174	1.1709e-17	
176	6.624e-18	
178	3.772e-18	
180	2.410e-18	
182	1.784e-18	
184	1.544e-18	
186	1.535e-18	
188	1.661e-18	
190	1.870e-18	
192	2.093e-18	
194	2.225e-18	
196	2.283e-18	
198	2.260e-18	
200	2.256e-18	
205	2.153e-18	
210	2.345e-18	
215	2.632e-18	-2.02
220	2.720e-18	-1.79
225	2.474e-18	-1.50
230	1.958e-18	-0.96
235	1.389e-18	-0.04
240	8.860e-19	0.71
245	5.190e-19	1.80
250	2.803e-19	2.70
255	1.401e-19	3.91
260	6.607e-20	5.16
265	3.037e-20	6.33
270	1.347e-20	7.75
275	5.90e-21	8.74
280	2.55e-21	11.6
285	1.14e-21	13.8
290	4.99e-22	15.3
295	2.10e-22	16.5
300	9.0e-23 	21.9