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VOLUME 19 (1974) | ISSUE 5 | PAGE 271
Investigation of the excitation of strontium atoms by electron impact from metastable states
The method of intersecting electron and atom beams was used to perform experiments on stepwise excitation of strontium atoms from metastable states. The excited atoms were produced by passage of the atom beam through a pulsed gas-discharge chamber. We investigated the excitation of four triplet levels from the ground state and excited states. Using as an example the comparison of the excitation functions of the transition 53P2 — 63£>2 from the ground and metastable states, it is shown that their behavior differs significantly in character. So large a difference between the shapes of the curves is attributed to the fact that the excitation of the investigated level starts from initial states having different multiplicities.