title: Motional averaging of nuclear resonance in a field gradient.
abstract: The traditional view of nuclear-spin decoherence in a field gradient due to molecular self-diffusion is challenged on the basis of temperature dependence of the linewidth, which demonstrates different behaviors between liquids and gases. The conventional theory predicts that in a fluid, linewidth should increase with temperature; however, in gases we observed the opposite behavior. This surprising behavior can be explained using a more detailed theoretical description of the dephasing function that accounts for position autocorrelation effects.
authors.affiliation: Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E Young Drive East, Los Angeles, California 90095-1059, USA.
authors.forename: Nanette N
authors.initials: NN
authors.lastname: Jarenwattananon
authors.affiliation: Department of Chemistry and Biochemistry, University of California Los Angeles, 607 Charles E Young Drive East, Los Angeles, California 90095-1059, USA.
authors.forename: Louis-S
authors.initials: LS
authors.lastname: Bouchard