wavelength	cross section 	error limit

290 to 295	4.78e-20	2.4e-21
295 to 300	4.30e-20	2.1e-21
300 to 305	3.74e-20	1.9e-21
305 to 310	3.21e-20	1.6e-21
310 to 315	2.73e-20	1.4e-21
315 to 320	2.30e-20	1.1e-21
320 to 325	1.90e-20	9.0e-22
325 to 330	1.53e-20	7.0e-22
330 to 335	1.21e-20	6.0e-22
335 to 340	9.17e-21	4.6e-22
340 to 345	6.54e-21	3.3e-22
345 to 350	4.19e-21	2.1e-22
350 to 355	2.20e-21	1.1e-22