Double multiphpton ionization of strontium atom
Aleksakhin I.S. , Zapesochnyi I.P. , Suran V.V.
Results are presented of investigations of multiphoton ionization of strontium atoms of a neodymium laser. The degrees of nonlinearity of the processes of production of singly charged (K+ = 5.0±0.2) and doubly charged (K2+ = 10.1 ±0.6) ions. It is proposed that the doubly charged ions are produced from the ground state of the atom by simultaneous detachment of the external electrons.