Phys. Rev. Lett. 85, 38–41 (2000)Excited-Configuration Metastable Level Lifetimes of Cl-like Mn IX and Fe XReceived 1 December 1999; published in the issue dated 3 July 2000 Forbidden transitions from levels with 3P and 1D cores in excited configurations of Cl-like Mn IX and Fe X have been isolated using interference filters. The fluorescence decay lifetimes of ions orbiting in a Kingdon ion trap were measured. New relativistic configuration interaction calculations of relevant level lifetimes, to aid the analysis, based on B-spline basis sets, are also presented. Line identifications and experimental lifetimes are Mn IX (4D7/2-4F9/2):363(-3/+7) nm; τ(Mn IX 3p4(3P)3d4F9/2) = 210±42 ms; τ(Fe X ,3p4(3P)3d4F9/2) = 85.7±9.2 ms; τ(Fe X ,3p4(3P)3d4F7/2) = 93±30 ms; and τ(Fe X ,3p4(1D)3d2G9/2) = 17.8±3.1 ms. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.38
DOI:
10.1103/PhysRevLett.85.38
PACS:
32.70.Fw, 32.50.+d
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