Multi-dimensional spectroscopy

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Abstract
Three-dimensional lineshapes which are observed in non-linear stochastic N.M.R. spectroscopy are analysed in terms of 1D and 2D cross-sections. Two important results are obtained: (1) A 1D sub-diagonal cross-section, which is similar to a conventional CW or FT N.M.R. spectrum, can exhibit a narrower line-shape than obtained in 1D FT-spectroscopy. (2) The relaxation times T 1 and T 2 can be determined from the lineshapes of selected cross-sections, independent of magnetic field inhomogeneity.