Nuclear Quadrupole Resonance Study of Molecular Motion and Intermolecular Forces in Solid Chlorine

概要

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Nuclear quadrupole resonance frequencies of ^35<C>l and ^37<C>l in solid chlorine were measured between 20°K and its triple point 172°K. The spectrum consists of a doublet at low temperatures because of isotopic splitting. The results were analyzed in terms of temperature-dependent libration frequencies in a quasi-harmonic approximation. The quadrupole coupling constant for ^35<C>l was found to be 108.975±0.003 Mc/sec at 0°K and 109.872±0.010 Mc/sec for the static lattice. The librational frequency was 90.1±3.0cm^<-1> at 0°K decreasing to 74.3cm^<-1> at 160°K. The lower limit to the asymmetry of the electric field gradient was 8.5% in comparison to bromine (20%) and iodine (17.5%), showing the existence of some covalent character in the intermolecular forces. Some problems concerning the intermolecular potential in solid and gaseous chlorine are pointed out in connection with the re-analysis of the second virial coefficient.
社団法人日本物理学会の論文
1967-01-05