HIGH PRECISION MEASUREMENT OF THE LIFETIME OF THE 3P2 AND 4P5/2-STATES IN Ar16+ AND Ar15+

H. Dohmann , R. Mann

In addition to the four known metastable (1s2s)1S0, 3S1, 3P2 and 4P5/2- states promptly decaying levels in Li- and Be-like Ar could be identified in the delayed x-ray and electron spectrum. Although these states have only a lifetime of about 10-l4 s the influence of these lines on the spectrum is observed 10-9 s after passing the foil. This effect is explained by cascading processes with high principal quantum number n ≥ 14. The measured lifetime of the 4P5/2-state, considering the influence of cascades, is (0.58 ± 0.02) ns and is in very good agreement with the known value of 0.56 ns, predicted by theory. The 3P2-state is not populated by cascading processes and its lifetime is (1.44 ± 0.08) ns.

Domaines: Articles anciens

H. Dohmann, R. Mann. HIGH PRECISION MEASUREMENT OF THE LIFETIME OF THE 3P2 AND 4P5/2-STATES IN Ar16+ AND Ar15+. Journal de Physique Colloques, 1979, 40 (C1), pp.C1-218-C1-220. ⟨10.1051/jphyscol:1979145⟩. ⟨jpa-00218425⟩