T in K cross sect. at 248 nm 423 6.68e-17 473 8.08e-17 523 9.49e-17 573 1.09e-16 623 1.23e-16 673 1.37e-16 723 1.51e-16 773 1.65e-16 823 1.79e-16 873 1.93e-16 923 2.07e-16 973 2.21e-16 1023 2.35e-16 1073 2.49e-16 1123 2.64e-16 1173 2.78e-16 1223 2.92e-16 1273 3.06e-16