The nuclear quadrupole resonance of I^<127> in solid iodine has already been measured 1) 2) 3) and also the resonance frequencies were reported as 332 Mc and 644 Mc at room temperature. The structure of the resonance line has also been studied 4) precisely with a single crystal of iodine, and the complexity of the structure has been explained as a result of the electron-coupled spin-spin interaction.
In this paper, the spectrum of the nuclear quadrupole resonance of iodine nuclei in the surroundings of paraffin or sulfur was investigated in the solid state by using the mixtures of iodine and paraffin or sulfur in comparison with the pure crystalline iodine powder. The shift of resonance frequency of iodine nuclei in the different surroundings can not be observed. The width of the absorption lines of the mixture of iodine and sulfer was almost equal to that of the crystalline iodine, but the width of the absorption line of the mixture of iodine and paraffin seemed to be different from that of the crystalline iodine and is very narrow.
This result shows us that the nuclei of iodine in paraffin are oriented to a fixed direction as likely as in a single crystal of pure iodine.