T in K cross sect. at 190 nm 970 3.42e-20 1257 7.18e-20 1355 1.01e-19 1726 2.03e-19 1840 2.15e-19 1981 2.93e-19 2490 3.78e-19 2714 4.20e-19 3632 5.57e-19 4220 6.10e-19