Magnetic-field-induced quadrupole splitting in gaseous and liquid Xe-131 NMR: Quadratic and quartic field dependence

A theory for the magnetic-field-dependent quadrupole splitting in the Xe-13 1 NMR spectra in isotropic media is presented and tested by ab initio elect ronic structure calculations. Evidence exists only for even-power magnetic field dependence. The dominant mechanism is verified to be the electric fie ld gradient caused by the diamagnetic distortion of the atomic electron clo ud, quadratic in the magnetic held. The computed results are in excellent a greement with the recent experiment by Meersmann and Haake.