ARRHENIUS PARAMETERS FOR THE REACTION OF H-ATOMS WITH GEH4

Rate constants for H atom attack on GeH4 have been measured in pulsed photolysis experiments in the temperature range 293-473 K. H atoms wer e generated by the Hg-sensitized photolysis of H-2 and were monitored by Lyman-alpha absorption. The values obtained are given by k(8)/cm(3) s(-1) = (0.98 +/- 0.13) x 10(-10) exp[(-926 +/- 49)/T] An evaluation of the available data on the reaction has been undertaken, and the bes t value for the rate constant over the temperature range 200-500 K is recommended to be k(8)/cm(3) s(-1) = (1.21 +/- 0.10) x 10(-10) exp[(-1 008 +/- 25)/T].