Dielectronic Resonance Method for Measuring Isotope Shifts

Abstract

Longstanding problems in the comparison of very accurate hyperfine-shift measurements to theory were partly overcome by precise measurements on few-electron highly-charged ions. Still the agreement between theory and experiment is unsatisfactory. In this paper, we present a radically new way of precisely measuring hyperfine shifts, and demonstrate its effectiveness in the case of the hyperfine shift of $4s\_1/2$ and $4p\_1/2$ in ${}^{207}{\mathrm{Pb}}^{53+}$. It is based on the precise detection of dielectronic resonances that occur in electron-ion recombination at very low energy. This allows us to determine the hyperfine constant to around 0.6 meV accuracy which is on the order of 10%.

References in corpus (1)

• Transition energy and lifetime for the ground state hyperfine splitting of high Z lithiumlike ions

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• Dielectronic recombination studies of ions relevant to kilonovae and non-LTE plasma
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