Proton Spin-Lattice Relaxation in NH₄Cl

Proton Spin–Lattice Relaxation in Monocrystalline Ammonium Chloride

“…ab (g), [7] effects at all temperatures. Our earlier description of the anisotropic proton spin-lattice relaxation in monocrystalline C 4 Cl confirms this statement (13).…”

“…With identically oriented NH / 4 ions, the lattice is in its ordered state (Fig. 1b) relaxation times exists in the theories (8)(9)(10)(11) and no anisotropy follows from (7,25,26) at all temperatures.…”

“…In the NMR experiments, the ACFs of the second rank (7,12,25,26) and only once in the monocrystal of NH 4 Cl (13). The polycrystalline experimental data were analyzed with the help of the single-correlation-time expression assuming the isotropic reorientation of an ammonium ion (2,25,26) as well as by use of two correlation times corresponding to the C 3 and S 4 reorientations of the NH ties of the ion motion as well as the proton relaxation are averaged in a polycrystalline sample.…”