Generating spin turbulence through nonlinear excitation in liquid-state NMR.
Chaotic dynamics of a water magnetization in a 600 MHz NMR spectrometer was generated by a radiation damping-based electronic feedback. Erratic induction signal was observed for several tens of seconds. The analysis of the data shows that this chaotic behaviour can be ascribed to spin turbulence in the sample and that a simpler model based on the three-dimensional Bloch equations modified to include a feedback field may not account for the experimental data.
Abergel
Daniel
D
Département de Chimie, Ecole Normale Supérieure, 24, rue Lhomond, 75231 Paris Cedex 05, France. daniel.abergel@ens.fr
Louis-Joseph
Alain
A
D004581:Electronics; D004867:Equipment Design; D007700:Kinetics; D050866:Liquid Crystals / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation / Q000379:methods*; D008280:Magnetics; D017711:Nonlinear Dynamics; D011827:Radiation; D011846:Radio Waves; D012680:Sensitivity and Specificity