document: Under these experimental conditions, the observed dynamics has to occur where the probe laser induces the reactions resulting in further ionization [30]. The two-step decay model [26] was applied to explain the above-mentioned fragmentation of DCPD to CPD, shown in Figure 8a. The fitting of the rise and decay components of the transients were done by Matlab® programming using the curve fitting Levenberg–Marquardt algorithm. The best fit decay constants for the biexponential decay components of C10H12+ ion signal is τ1=35fs and τ2=240fs, while that for C5H6+ ion signal is τ1=36fs and τ2=280fs, respectively. These decay constants conform to the previously reported time constants of norbornene and norbornadiene [22,23]. The transients of the reaction fragment C5H6+ are sufficiently different from that of the parent ion C10H12+ indicating that we are studying the distinct dynamics of the neutrals and not that of the parent ion fragmentation [24]. Applying laser control principles under such experimental circumstances also confirms that we are controlling the product yield of C5H6+, resulting from the photochemical reaction of DCPD.
extractive_keyphrases: applying laser control principles best fit decay constants biexponential decay components cpd curve fitting levenberg–marquardt algorithm dcpd decay constants distinct dynamics of the neutrals further ionization matlab® programming norbornadiene norbornene observed dynamics parent ion probe laser reactions rise and decay components transients
abstractive_keyphrases: c10h12+ c10h12+ ion signal c5h6+ c5h6+ ion signal controlling the product yield of c5h6+ fragmentation of dcpd to cpd laser control principles parent ion fragmentation photochemical reaction of dcpd two-step decay model τ1=35fs τ1=36fs τ2=240fs τ2=280fs