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Spontaneous Two-Photon Decay Rates In Hydrogenlike And Heliumlike Ions, Gordon W. F. Drake
Spontaneous Two-Photon Decay Rates In Hydrogenlike And Heliumlike Ions, Gordon W. F. Drake
Physics Publications
A theoretical study of the two-photon emission rate from the 1s2s 1S state of two-electron ions is presented. High-precision values of the nonrelativistic emission rate for ions with nuclear charge Z up to 36 are obtained by use of correlated variational wave functions of the Hylleraas type. Summations over intermediate states are performed by finite-basis-set methods. The results are used to obtain an accurate extrapolation formula and to study the convergence characteristics of a 1/Z expansion for the decay rate. The leading hydrogenic term is calculated to an accuracy which substantially exceeds Klarsfeld's, and the next term is obtained for …
Lamb Shifts And Fine-Structure Splittings For Light Muonic Ions: Hyperfine-Structure Corrections, R. A. Swainson, Gordon W. F. Drake
Lamb Shifts And Fine-Structure Splittings For Light Muonic Ions: Hyperfine-Structure Corrections, R. A. Swainson, Gordon W. F. Drake
Physics Publications
Our previous calculations for the energy splittings of the states 2s1/2-2p1/2 and 2s1/2-2p3/2 for the muonic ions - Li, - Be, and - B are extended to include hyperfine-structure corrections. The results show that there is a rich spectrum of well-resolved hyperfine transitions lying throughout the visible and infrared parts of the spectrum. A measurement of the transition frequencies would provide a precise determination of the nuclear radius and the hyperfine-structure coupling constants. © 1986 The American Physical Society.
Asymmetry Measurement Of The 2s1/2(Hy1s1/2 Relativistic Magnetic-Dipole Matrix Element In He+, A. Van Wijngaarden, J. Patel, Gordon W. F. Drake
Asymmetry Measurement Of The 2s1/2(Hy1s1/2 Relativistic Magnetic-Dipole Matrix Element In He+, A. Van Wijngaarden, J. Patel, Gordon W. F. Drake
Physics Publications
When a beam of spin-polarized He+(2s1/2) ions is quenched by an electric field E, the emitted radiation intensity contains a left-right-asymmetry term proportional to Pk×E, where P is the spin-polarization vector and k is the observation direction. The resulting asymmetry is proportional to the relativistic magnetic dipole matrix element 1s1/2,1/2M1,02s 1/2,1/2. The measured asymmetry (2.935±0.337)×10-4 corresponds to the matrix element 1s1/2,1/2M1,02s 1/2,1/2 =-(0.2725±0.0313)α2eLatin small letter h with stroke/mc, in agreement with the theoretical value -0.2794α2eLatin small letter h with stroke/mc. The measurement provides a direct test of the relativistic corrections to the magnetic dipole transition operator. © 1986 The American …