Abstract
The hyperfine induced 2s2p 3P0 → 2s2 1S0 transition rate in Be-like 33S12+ has been measured employing electron-ion recombination spectroscopy at a heavy-ion storage ring. The measured value of 0.094(4) s−1 is in excellent agreement with the results of the most recent theoretical calculations.
Highlights
Hyperfine quenching in atoms and ions [1] is the shortening of excited-state lifetimes by the interaction of the electron shell with the magnetic moment of the atomic nucleus
A drastic hyperfine quenching effect is observed in divalent atoms and ions where the first excited level above the ground state is the ns np 3P0 state. (Fig. 1)
Under the assumption that the target electron density and the partial pressures of the residual-gas components do not change during the measurement, the time evolution of the populations Nm and Ng of the metastable 2s 2p 3P0 state and of the 2s2 1S0 ground state, respectively, can be obtained from solving the following set of rate equations [41]: d Nm dt
Summary
Hyperfine quenching in atoms and ions [1] is the shortening of excited-state lifetimes by the interaction of the electron shell with the magnetic moment of the atomic nucleus. A drastic hyperfine quenching effect is observed in divalent atoms and ions (with valence shell n) where the first excited level above the ground state is the ns np 3P0 state. A nucleus with nonzero spin induces a mixing of the ns np 3P0 state with its neighboring ns np 3P1 state via the hyperfine interaction. This drastically increases the ns np 3P0 → (ns)2 1S0 transition rate. A comprehensive review of the field, which covers other classes of atomic systems such as He-like ions, has been published recently [1]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
