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A quantitative method of deconvoluting the ESR dating signal in fossil tooth enamel into individual signals is presented. The method uses integrated ESR spectra. Two models give consistent results: the dating signal is a sum of four isotropic Gaussian signals or alternatively of two isotropic Gaussian signals plus an anisotropically split axial signal. A broad underlying isotropic signal at g = 2.007 is found independently of the model applied. The results indicate that past studies based on the overall peak-to-peak amplitude may overestimate the D E (and thus the age) of enamel samples by about 15%.