NMR LINESHAPES IN SOLID TRITIUM AND DEUTERIUM-TRITIUM

We report on the NMR free induction decays (FID) fr om solid tritium ( T-2), deuterium-trititum (D-T), and H-2 HD and D-2 containing 2% triti um. The FID in pure components is typically a beat decay for spin conc entrations >30%, can exponential for spin concentrations <10%, and a G aussian or Gaussian-exponential for spin concentrations in between. In mixtures of DT or HD, the deuteron FID is a Gaussian-exponential whil e the T or H FID is typically a beat decay ol Gaussian depending on te mperature. The linewidth is shown to consist mostly of inter molecular and intramolecular contr ibutions, with a small component resulting f rom unpaired hydrogen atoms created by the tritium radioactivity.