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Eigenvalues Of The 2p3pp3 And 2p3dd1,3 Bound States Of The Helium Isoelectronic Sequence, H. Doyle, M. Oppenheimer, Gordon W. F. Drake
Eigenvalues Of The 2p3pp3 And 2p3dd1,3 Bound States Of The Helium Isoelectronic Sequence, H. Doyle, M. Oppenheimer, Gordon W. F. Drake
Physics Publications
The 1Z expansion method is used to calculate the eigenvalues of the 2p3pP3 and 2p3dD1,3 states of the helium isoelectronic sequence. The results are compared to variational calculations for neutral helium. Wavelengths are predicted for a number of transitions originating in doubly excited states of the heliumlike ions up to Fe xxv. The results for neutral helium are compared to recent beam-foil experiments and alternative line identifications are made. The predicted wavelength for the 2p3dD3-2p2P3 transition is 3014, in close agreement with the line observed by Berry et al. at 3012 ± 2. © 1972 The American Physical Society.
Relativistic Corrections To Radiative Transition Probabilities, Gordon W. F. Drake
Relativistic Corrections To Radiative Transition Probabilities, Gordon W. F. Drake
Physics Publications
The rate of spontaneous emission of radiation by a loosely bound composite system is calculated from quantum electrodynamics correct through terms of relative order α2Z2. Recent criticisms by Feinberg and Sucher of the semiclassical method of deriving the higher-order radiation coupling terms are discussed. It is proved that the Breit interaction remains valid in the presence of radiation emission and that the semiclassical and quantum-electrodynamic methods of deriving the higher-order coupling terms always yield the same results to relative order α2Z2. We discuss in particular relativistic corrections to allowed and spin-forbidden electric dipole transitions and the 1s2s S13-1s2 S01 magnetic …
Radiative Transition Rates From The 2p3p P3 And 2p3d D1,3 States Of The Helium Isoelectronic Sequence, Gordon W. F. Drake
Radiative Transition Rates From The 2p3p P3 And 2p3d D1,3 States Of The Helium Isoelectronic Sequence, Gordon W. F. Drake
Physics Publications
The Hylleraas-Scherr-Knight variation-perturbation method is applied to the calculation of oscillator strengths for the dominant transitions from the metastable 2p3p P3 and 2p3d D1,3 states of helium and the heliumlike ions. The results explain the absence of the 1s2pP3-2p3pP3 transition of He i from recent beam-foil excitation spectra. © 1972 The American Physical Society.