wavel.	cross sect.	error limit
-----------------------------------
184.950	1.343e-19	0.004-19
202.548	2.161e-20	0.008e-20
206.200	1.133e-20	0.005e-20
213.857	2.27e-21	0.01e-21
228.802	5.92e-23	0.03e-23