... cross sections is 10 5 and 10 7 correspondingly. This fact provides the obvious non-efficiency of standard photoionization scheme. Coherence and Ultrashort Pulse Laser Emission 164 where ... account 414 412 377 376 362 375 323 SE 1,96 10- 27 2 ,10 10-27 SE 1,88 10- 27 1,98 10- 27 2,8 10- 27 2,4 10- 27 2,2 10- 27 2,2 10- 27 2,0 10 -27 Table 1. Characteristics for 3p21S0 ... fields, in particular, laser fields has been the subject of intensive experimental and theoretical investigation (Holt et Coherence and Ultrashort Pulse Laser Emission 180 Using δ -pulse provides...