Fig. 3: Argon.
From: Relativistic treatment of hole alignment in noble gas atoms

a The populations of ion hole 3p, j = 3/2 with different magnetic quantum numbers in argon as a function of the photon energy. The system interacted with a Gaussian pulse of 300 as with the intensity of 1012 Wcm−2 In the computations, only the 3p orbital was open and propagation ran from −2400 as to 7200 as. b the hole alignment ratio of populations in (a).