Fig. 1: Experimental results and simulations of TERCE.
a, b present the θcm-KER distributions of the three-body CE channel induced by linearly and circularly polarised 40 fs laser pulses, KER and θcm stand for the total kinetic energy release and the bond angle. Here, I labels the enhanced ionisation with weak polarisation independence, and II and III label the distributions with strong polarisation dependence, indicating that these events are correlated with electron recollision processes. c θcm-KER distribution mainly originates from TERCE for linearly polarised laser pulses. The events with larger energy differences (>12 eV) between D+ and O+ are selected for region I and II. The events from asymmetric CE are added for region III. d θcm-KER distribution for circularly polarised laser pulses. The same conditions as c are used. The two-dimensional global fit of (c) with seven dominant (θcm-KER) components are shown in (f). The four components in region II are marked by the dashed and solid circles in (c) and (f). The intensity is plotted on a logarithmic scale. e Simulated θcm-KER distributions based on TERCE. For region II, the θcm-KER distributions dissociated along the doublet and quartet states of the trication are shown and marked with the dashed and solid circles, respectively. For region III, the θcm-KER distribution dissociated along the quartet state of trication is shown.
