摘要: The reactivity of tritium is largely determined by a steady state ion concentration of about one part in 10(sup 9) of the background molecules. These ions determine the reaction rates with other materials, and impurities of the or... 展开 The reactivity of tritium is largely determined by a steady state ion concentration of about one part in 10(sup 9) of the background molecules. These ions determine the reaction rates with other materials, and impurities of the order of 1 ppM can be shown to determine on which species the ion resides. In pure tritium, T(sub 3+) changes to T(sub 5+) as the pressure is increased above a few thousand pascals (10 torr). In the presence of common impurities, the ions CT(sub 5+), T(sub 3)O(sup +), and N(sub 2)T(sup +) become dominant. Rarely, because of the large energy involved, N(sup +) is formed which leads to NT(sub 4+). It is shown that when the ion resides on the impurity such as CH(sub 4)T(sup +), the exchange only takes place during methane-methane collisions and thus it is slow. 10 refs., 2 figs., 1 tab. (ERA citation 13:047086) 收起