T in K cross sect. at 196.4 nm 979 1.22e-20 1270 5.04e-20 1367 6.91e-20 1369 6.94e-20 1741 1.46e-19 1840 1.62e-19 1997 2.03e-19 2511 3.23e-19 2733 3.67e-19 3631 5.01e-19 4248 5.40e-19