Temperature dependence of the recombination rate constant of hydrogen atoms in solid H2 at 1.5 K< T < 5.5 K
Katunin A. Ya., Lukashevich I. I., Orozmamatov S. T., Sklyarevskii V. V., Suraev V. V., Filippov V. V., Filippov N. I., Shevtsov V. A.
A second-order recombination process occurs in the solid mixture Η + H2. At T>4.5 К the rate constant for this recombination is К [T)~ exp (~Ea/kT), with Ea = 107±10 K. The temperature dependence K(T) in the region 1.5 Κ < Τ <4.3 К apparently corresponds to a nonclassical diffusion of Η atoms in H2.