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Pressure and temperature dependence of the chlorine NQR in caesium and sodium chlorates
Author(s) -
Ramesh K. P.,
Suresh K. S.,
Raghavendra Rao C.,
Ramakrishna J.
Publication year - 2008
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/mrc.2206
Subject(s) - chemistry , nuclear quadrupole resonance , caesium , sodium chlorate , electric field gradient , relaxation (psychology) , spin–lattice relaxation , sodium , quadrupole , analytical chemistry (journal) , nuclear magnetic resonance , inorganic chemistry , atomic physics , social psychology , psychology , physics , organic chemistry , chromatography
The 35 Cl nuclear quadrupole resonance (NQR) frequencies (ν Q ) in caesium and sodium chlorates were measured as a function of temperature, from 77 to 300 K at different pressures up to 5.1 kbar, and the data were analysed to estimate the volume dependence of the electric field gradient (EFG), torsional frequency and also the contributions to the NQR frequency from static and dynamic effects. The variation of spin‐lattice relaxation time with pressure at different temperatures was studied in the case of sodium chlorate and at room temperature in case of caesium chlorate. The pressure dependence of the spin‐lattice relaxation time ( T 1 ) suggests that the relaxation is mainly due to the torsional motions. Copyright © 2008 John Wiley & Sons, Ltd.