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Ultracold homonuclear and heteronuclear collisions in metastable helium

Autor: Cocks, D. G., Whittingham, I. B., Peach, G.

Publikováno v: Phys. Rev. A 99, 062712 (2019)

Scattering and ionizing cross sections and rates are calculated for ultracold collisions between metastable helium atoms using a fully quantum-mechanical close-coupled formalism. Homonuclear collisions of the bosonic ${}^{4}$He$^{*} +{}^{4}$He$^{*}$

Externí odkaz: http://arxiv.org/abs/1904.01281

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Collisional broadening of alkali doublets by helium perturbers

Autor: Mullamphy, D. F. T., Peach, G., Venturi, V., Whittingham, I. B., Gibson, S. J.

We report results for the Lorentzian profiles of the Li I, Na I and K I doublets and the Na I subordinate doublet broadened by helium perturbers for temperatures up to 3000 K They have been obtained from a fully quantum-mechanical close-coupling desc

Externí odkaz: http://arxiv.org/abs/physics/0609251

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Ultracold atomic collisions in tight harmonic traps: Perturbation theory, ionization losses and application to metastable helium atoms

Autor: Beams, T J, Peach, G, Whittingham, I B

Collisions between tightly confined atoms can lead to ionization and hence to loss of atoms from the trap. We develop second-order perturbation theory for a tensorial perturbation of a spherically symmetric system and the theory is then applied to pr

Externí odkaz: http://arxiv.org/abs/physics/0408125

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