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VOLUME 26 (1977) | ISSUE 1 | PAGE 14
Double multiphpton ionization of strontium atom
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.