T in K cross sect. at 190 nm 970 1.92e-20 1303 6.84e-20 1636 1.45e-19 1969 2.40e-19 2302 3.42e-19 2635 4.46e-19 2968 5.47e-19 3301 6.45e-19 3634 7.37e-19 3967 8.25e-19 4300 9.06e-19