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- W1667237311 abstract "Radiative transition rates provide information on the long-range behavior of atomic wavefunctions. Measurements of radiative rates thus complement energy level measurements which primarily test atomic wavefunctions near the nucleus. Slow transition rates ({le} 10{sup 6} s{sup {minus}1}) have been measured by laser fluorescence or in ion traps, while faster rates are measured using the beam-foil technique on heavy-ion accelerators. The latter technique provides rates up to about 10{sup 12}s{sup {minus}1} corresponding to picosecond lifetimes. Here, the authors present measurements of femtosecond lifetimes. The lifetime of the 2p{sub 3/2}{sup 5}3d{sub 5/2} {sup 1}D{sub 1} in neonlike Ba{sup 46+} was measured to be 1.65 fs with an uncertainty of +0.19 and {minus}0.05 fs. The measurement was carried out on the Livermore EBIT using ultrahigh-resolution crystal spectroscopy of cold ions with temperature as low as 0.06 keV interacting with a 7.50-keV electron beam. The radiative lifetime was then determined from the measured width of the Lorentzian-shaped line profile and the time-energy uncertainty relations. The technique opens the possibility of determining ultrafast lifetimes from virtually any highly charged ion." @default.
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- W1667237311 date "1996-05-01" @default.
- W1667237311 modified "2023-09-24" @default.
- W1667237311 title "Measurements of Femtosecond Radiative Lifetimes in Highly Charged Ions" @default.
- W1667237311 hasPublicationYear "1996" @default.
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