Spin-lattice relaxation of protons and deuterons in NH4NO3 and ND4NO3

The spin-lattice relaxation timesT1 were measured for protons and deuterons in polycrystalline NH4NO3 and ND4NO3. The investigation was carried out at temperatures between about 80°K and 430°K using the NMR pulse method. From the measured values ofT1 the activation energies for the reorientation motions of NH 4 + and ND 4 + ions below 200°K were calculated to be 2.07±0.11 kcal/mole and 2.56±0.23 kcal/mole, respectively. The quadrupole coupling constante2Qq/h of the deuteron in ND 4 + ion was found to be 194±30 kc/s.