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Abstracts
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Authors
Sohn, C.W., Jung, J.K., Seo, Y.M., Choh, S.H., Park, Y.M. and Song, S.K.
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Title
Impurity Effects on 14N NQR in Mixed Systems; [(CH2)6N4]1-x [KNO3]x and [(CH2)6N4]1-x[SC(NH2)2]x
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Journal
Jrnl of the Korean Physical Society, Vol 32, Feb 1998, pp. S639-S642
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Abstract: X-ray diffraction in 14N NQR have been investigated at room temperature in mixed systems, [(CH2)6N4]1-x [KNO3]x and [(CH2)6N4] 1-x [SC(NH2)2]x , grown by evaporating mixed solutions. The results of x-ray pattern in both systems show that introducing [KNO3 or SC(NH2)2] impurity into (CH2)6N4 leads to a formation of impurity cluster in the cubic phase of (CH2)6N4. The spin-lattice relaxation time (T1) of 14N NQR in (CH2)6N4 matrix in two mixed systems were measured. In both systems T1 tends to increase with impurity content. The change of T1 due to impurity is explained by the increase in the activation energy for reorientational motion of (CH2)6N4 molecules. Impurity effects of local molecular dynamics in two mixed systems are also discussed and compared to those from the hydrated HMT.
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