Is Spin–Rotational Relaxation Effective in Solid NH4I?

摘要: Spin–lattice relaxation times for protons in NH4I and deuterons ND4I are reported, the dipolar quadropolar rates derived. In cubic phase of NH4I, these used to analyze frequency‐independent rate proton spins, which increases approximately exponentially with increasing temperature, a slope 1.5 kcal/mole. The mechanism suggested is spin–rotational interaction. There qualitative agreement both rotational diffusion transient rotation models, were developed liquids. However, strength coupling predicted by models some one two orders magnitude too weak quantitatively reproduce observed this solid.