T in K cross sect. at 447.7 nm 295 5.18e-18 300 4.87e-18 320 3.82e-18 340 3.03e-18 360 2.42e-18 380 1.95e-18 400 1.59e-18 420 1.31e-18 440 1.08e-18 460 9.04e-19 480 7.62e-19 500 6.49e-19 520 5.57e-19 540 4.82e-19 560 4.22e-19 580 3.72e-19 600 3.31e-19 620 2.97e-19 640 2.69e-19 660 2.46e-19 680 2.26e-19 700 2.11e-19 720 1.98e-19 740 1.87e-19 760 1.79e-19 780 1.72e-19 800 1.68e-19