Beam-foil lifetime measurements in Pb III and Pb IV

1 May 1988

journal article
Published by Canadian Science Publishing in Canadian Journal of Physics

Vol. 66 (5) , 402-404
https://doi.org/10.1139/p88-067

Abstract

Beam-foil intensity decay curves for transitions in the wavelength range from 900 to 2200 Å are used to derive the lifetimes of the 6s6p¹P₁ and ³P₁ 6s6d¹D₂, 6s7s¹S₀, and 6p²¹D₂ levels of Pb III, and the 6p²P_1/2 and ²P_3/2, 6d²D_3/2 and ²D_5/2, 7s²S_1/2, and 5d⁹6s²²D_3/2 levels of Pb IV, arbitrarily normalized decay curve (ANDC) analyses being used for the 6s6p and 6p levels. In the case of the two 6s6p levels studied in Pb III, good agreement is found with a recent calculation in which a polarization model accounts for valence–core correlation. However, the agreement between the lifetimes observed for the 6p levels in Pb IV and a similar, earlier calculation is only fair.

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