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Pressure Dependence of the Chlorine NQR in Chloro Pyridines

Ramesh, KP and Ramakrishna, J and Suresh, KS and Rao, CR (2000) Pressure Dependence of the Chlorine NQR in Chloro Pyridines. In: the XVth International Symposium on Nuclear Quadrupole Interactions, July,25-30.1999, Leipzig, Germany,.

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The Cl-35 NQR frequency (nu(Q)) and spin lattice relaxation time (T-1) in 2,6-dichloropyridine, 2 amino 3,5-dichloropyridine and 6 chloro 2-pyridinol have been measured as a function of pressure up to 5.1 kbar at 300 K, and the data have been analysed to estimate the temperature coefficients of the NQR frequency at constant volume. All the three compounds show a non linear variation of the NQR frequency with pressure which can be described by a 2(nd) order polynomial in pressure. The rate of change of the NQR frequency with pressure is positive and decreases with increasing pressure. The spin lattice relaxation time TI in all the three compounds shows a small increase with pressure, indicating that the relaxation is mainly due to the torsional motions.

Item Type: Conference Paper
Publisher: Verlag der Zeitschrift für Naturforschung
Additional Information: Copyright of this Proceedings belongs to Verlag der Zeitschrift für Naturforschung.
Keywords: chlorine NQR; spin-lattice relaxation time; pressure dependence; 2,6 dichloropyridine; 2-amino 3,5-dichloropyrine; 6-chloro 2-pyridinol
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 04 Nov 2009 10:07
Last Modified: 04 Nov 2009 10:07
URI: http://eprints.iisc.ac.in/id/eprint/18102

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