Extended Data Fig. 5: ESR dose response curves (DRCs) derived from the Ti-H ESR signal measured in the quartz samples from Bété I.
From: Humans in Africa’s wet tropical forests 150 thousand years ago
Fitting was performed as follows: (see text for further information): a, with the Ti-2 function (data weighting by 1/s2); b, with the single saturating exponential (SSE) function (data weighting by 1/I2) with Dmax = 4.5 kGy; and c, Dmax = 2.8 kGy. Each experimental data point and associated vertical errors bar represent the mean ESR intensity and 1 standard deviation derived from the repeated measurements, respectively. DRCs display ESR intensities after noise subtraction.
