T(K) cross sect. at 174 nm 295 1.91e-17 400 1.88e-17 500 1.83e-17 600 1.79e-17 700 1.74e-17 800 1.68e-17 900 1.63e-17 1000 1.57e-17 1100 1.51e-17 1200 1.45e-17 1300 1.38e-17 1400 1.32e-17 1500 1.25e-17 1600 1.19e-17 1700 1.12e-17 1800 1.05e-17 2000 9.28e-18