
April 25, 2014 11:1 PSP Book - 9in x 6in 06-Rashid-A.-Ganeev-c06
Comparison of High-Order Harmonic Generation in Uracil 231
Figure 6.13 HHG in uracil plasma plume using 780 and 1300 nm probe
pulses and 780 nm, 160 ps ablating pulses. Reproduced from Ref. 89 with
permission from the PCCP Owners Society.
From the above, it is clear that there are differences in the
non-linear response of the ablation plumes of the two pyrimidine
nucleobases uracil and thymine. For better understanding of the
observed differences, the composition of the plumes was analyzed
via TOFMS. The mass spectra collected on uracil and thymine
nanosecond laser ablation plumes are presented ...