J = 1 TO J = 0 D2 CONVERSION IN SOLID D-T

J = 1 to J = 0 molecular rotational time constants for J = 1 D2 in solid D-T at 1.8 to 14 K have been obtained by analyzing the longitudinal relaxation times T1 of the tritons in the same sample. The inherent time constant in the electric quadrupole theory of T1 is a function of both the J = 1 T2 and J = 1 D2 concentrations. By subtracting out the J = 1 T2 behavior as obtained from pure T2 samples, the J = 1 to J = 0 D2 time constants remain. From 10 to 14 K, the D2 time constants are longer than those for T2 at constant temperature by the ratio of the nuclear magnetic moments. From 1.8 to 5.3 K, the two time constants are identical at about 5 h. A time-constant minimum occurs at about 10 K for both hydrogens. A rate-equation theory of rotational catalysis by free hydrogen atoms created by the tritium radioactivity is presented.