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Physics of Electronic and Atomic Collisions: ICPEAC XI

Observations of the induced-dipole transitions for alkaline-earth atoms colliding with rare gas atoms

Kiyoshi Ueda, Takashi Fujimoto, Kuniya Fukuda

Published Jan 1, 1979• 0 citations
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Photon Hall scattering from alkaline-earth-like atoms and alkali-like ions

Bart A. van Tiggelen, David Wilkowski

We investigate the possibility of observing a magneto-transverse scattering of photons from alkaline-earth-like atoms as well as alkali-like ions and provide orders of magnitude. The transverse magneto-scattering is physically induced by the interference between two possible quantum transitions of an outer electron in a S state, one dispersive electric-dipole transition to a P orbital state and a second resonant electric-quadrupole transition to a D orbital state. In contrast with previous mechanisms proposed for such an atomic photonic Hall effect, no real photons are scattered by the electric-dipole allowed transition, which increases the ratio of Hall current to background photons significantly. The main experimental challenge is to overcome the small detection threshold, with only 10−5 photons scattered per atom per second.

arXiv:1610.03389•The European Physical Journal Special Topics•May 1, 2017•1 citation
Using the wave functions of the multichannel-quantum-defect theory, a semiclassical theory for both elastic and inelastic collisional cross sections of Rydberg atoms, in which there can be more than one valence electron, with ground-state rare-gas atoms is obtained. Especially the noble-gas-induced broadening cross sections of Rydberg series in alkaline-earth atoms can be calculated. An application of theory is shown to explain the irregular broadening rates of Sr 5sns 1^{1}1S0{\mathit{S}}_{0}S0​ series due to collision with Xe, and a good agreement between theory and experiment is achieved.
We investigate the possibility of observing a magneto-transverse scattering of photons from alkaline-earth-like atoms as well as alkali-like ions and provide orders of magnitude. The transverse magneto-scattering is physically induced by the interference between two possible quantum transitions of an outer electron in a S state, one dispersive electric-dipole transition to a P orbital state and a second resonant electric-quadrupole transition to a D orbital state. In contrast with previous mechanisms proposed for such an atomic photonic Hall effect, no real photons are scattered by the electric-dipole allowed transition, which increases the ratio of Hall current to background photons significantly. The main experimental challenge is to overcome the small detection threshold, with only 10−5 photons scattered per atom per second.