mole fraction	T	cross sect. at 253.7 nm 
x10^2		(K)	(cm2 molecule^-1)
------------------------------------------------
8.0		1140	2.98e-19
		1165	4.05e-19
		1250	4.40e-19
		1415	5.47e-19
		1460	4.47e-19
		1460	5.47e-19
		1730	9.44e-19
5.0		 827	3.10e-19
		 885	3.33e-19
		1248	4.32e-19
		1353	4.32e-19
		1421	5.01e-19
		1574	7.11e-19
2.6		1290	3.82e-19
		1343	4.74e-19
		1346	4.63e-19
		1511	5.12e-19
		1634	8.18e-19
		1666	9.94e-19
		1847	1.12e-18
		1921	2.13e-18
1.7		 891	3.21e-19
		1296	4.13e-19
		1404	5.09e-19
		1486	5.74e-19
		1677	1.14e-18
		1919	1.52e-18