Role of elastic scattering in high-order above threshold ionization
Chen Zhang-Jin†, Ye Jian-Mian, Xu Yang-Bing
       
Intensity dependences of the weighted ionization yield (solid curve, left vertical axis) and the ionization yield (dotted curve, right vertical axis) for single ionization of He in a 120-fs pulse with a wavelength of 780 nm at peak intensities of (a) 6.5×1014 W/cm2 and (b) 8.0×1014 W/cm2. See text.