JMP  Vol.3 No.11 , November 2012
The Spin Transition and Susceptibility of NMR Samples in a Time Dependent Longitudinal Field
ABSTRACT
To construct pulsed high magnet, with rapid adjustments to large changes in the field strength, it is a mandatory acces-sory to development a special NMR probes to provide a precise real-time map of the magnetic field. In order to do so, it is necessary to understand the variations of the spin transition and susceptibility of NMR samples in a time dependent longitudinal field. This work analyzes the effect on the spin transition by a time dependent longitudinal field. For a 1/2 spin system, we have derived a simple formula for the prediction of the probabilities of occupation of the 1/2 and ?1/2 states in a non-static field. We also calculate the magnetic susceptibility of the water and give an analysis of the effect on the magnetic susceptibility in a time dependent longitudinal field and RF frequency.

Cite this paper
Y. Hu, H. Ma, J. Li and B. Xu, "The Spin Transition and Susceptibility of NMR Samples in a Time Dependent Longitudinal Field," Journal of Modern Physics, Vol. 3 No. 11, 2012, pp. 1732-1736. doi: 10.4236/jmp.2012.311214.
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