
April 24, 2014 17:36 PSP Book - 9in x 6in 05-Rashid-A.-Ganeev-c05
Isolated Sub-Femtosecond XUV Pulse Generation in Mn Plasma Ablation 169
5.4 Isolated Sub-Femtosecond XUV Pulse Generation in
Mn Plasma Ablation
In this section, I discuss the HHG from transition metal plasmas.
These are very promising targets in view of the giant resonances
found in the photoionization cross-sections. For example, the Mn
+
cross section is nearly 40 Mb at 50 eV photon energy [55],
whereas rare gas atoms have cross-sections between 1 and 8 Mb
at this photon energy [56]. Photorecombination–the third step in
the recollision model–is the inverse process of photoionization
[57] ...