Experimental Δ G ( r ) for both pumped (black) and thermally driven equilibrium (red) transitions, showing the dimerized PDF subtracted from the un-dimerized PDF, over the low- r range containing the W signature centred at 3.5 A of strong-dimer removal. The pumped data averages over all the positive pump–probe delay times, with the line thickness indicating uncertainty (Supplementary Note 2 ). The equilibrium data are scaled by 0.29 times; therefore, the signatures approximately match in scale.
