Hartree-fock transition theory and multi-electron transitions in atoms and molecules

Heterojunction Bipolar Transistor with an Additional Minority Carrier Reflection Barrier in the Emitter

“…It was carried out as a demonstrative example of the semiquantative capabilities of state-specific HF transition theory in describing two-electron excitations. Nevertheless, apart from large quantitative differences, the shape of the σ ++ (E) of [21] for the 4 P o → 4 P channel and the appearance of the maximum around 9 eV, in the length formulation, is very similar to that produced by the present calculation of the total cross section.…”

“…Aspects of the features of the σ ++ (E) for process (1) have been published as results of measurements [20] and of two theoretical investigations [21,22]. Of the latter, the first was reported by Nicolaides [21] and covered the photon energy range 6.53-24.80 eV.…”

“…Of the latter, the first was reported by Nicolaides [21] and covered the photon energy range 6.53-24.80 eV. It involved only the 4 P(εp, ε p) channel and the computation neglected electron correlation in initial and final states.…”

Radiative lifetimes of triply excited states of the Li isoelectronic sequence

“…Only 15 symmetry-adapted configurations were used for the 2s 2p P state, 11 for the 2p P, 11 for the 2s2p D, 11 for the 2s2p 5, 9 for the 2s2p P, and 8 for the 2p D . We also list the re- [19,28]) that the occurrence of multielectron transitions does not always have electron correlation as the exclusive cause. They are also allowed by the nonorthonormality between the self-consistent orbitals of initial and final states.…”

“…[19,28] that multielectron electric dipole transitions not only are allowed in the single configuration approximation but that their occurrence can be interpreted semiquantitatively as being caused mainly by the coupling of all the electrons (and not just the one seemingly making the dipole transition) in the two different self-consistent fields of initial and final states. [2] R. Bruch …”