Taking the reader through the underlying principles of molecular translational dynamics, this book outlines the ways in which magnetic resonance, through the use of magnetic field gradients, can reveal those dynamics. The measurement of diffusion and flow, over different length and time scales, provides unique insight regarding fluid interactions with porous materials, as well as molecular organisation in soft matter and complex fluids. The book covers both time and
frequency domain methodologies, as well as advances in scattering and diffraction methods, multidimensional exchange and correlation experiments and orientational correlation methods ideal for studying anisotropic environments. At the heart of these new methods resides the ubiquitous spin echo, a
phenomenon whose discovery underpins nearly every major development in magnetic resonance methodology. Measuring molecular translational motion does not require high spectral resolution and so finds application in new NMR technologies concerned with 'outside the laboratory' applications, in geophysics and petroleum physics, in horticulture, in food technology, in security screening, and in environmental monitoring.
The late Paul Callaghan was a world leader in the use of magnetic field gradients to measure molecular translational motion, having led most of the major advances for the past 30 years. He was made Professor of Physics in 1984, and was appointed Alan MacDiarmid Professor of Physical Sciences in 2001. The sole-authored and co-authored output of Callaghan and his co-workers is represented by some 250 scientific papers and 3 patents, and by a definitive research monograph. This work was recognized by a Fellowship of the Royal Society of New Zealand (1991), The Royal Society of London (2001), the (European) Ampere Prize (2004), The (NZ) Cooper (1991), Mechaelis (1994), Hector (1998), and Rutherford Medals (2006), and by Callaghan's election as President of the International Society of Magnetic Resonance (2008), appointment as Associate Editor of the Journal of Magnetic Resonance (2009), and award of the Gunther Laukien Prize for Magnetic Resonance (2010).
1. Thermal processes and diffusion ; 2. Flow and dispersion ; 3. Quantum description of nuclear ensembles ; 4. Introductory magnetic resonance ; 5. Magnetic field gradients and spin translation ; 6. Restricted diffusion ; 7. Restricted displacements and diffraction phenomena ; 8. Double wavevector encoding ; 9. Multidimensional PGSE NMR ; 10. Velocimetry ; 11. Translational dynamics and quantum coherence ; 12. Tricks of the trade