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Time-course of double lesion formation by LEE impact. T5BrUT was exposed to 10 eV electrons during 0, 0.5, 1, 1.5, 3, 5 minutes at a constant electron beam flux of 10.6 μA. The yield of double lesions was determined by HPLC-UV. The data was fitted to a single exponential (dashed line) and to a straight line at initial times (solid line, R=0.999). Each point is the average of 3 independent measurements.
