Nonadiabatic coupling in cold collisions of spin-polarized metastable hydrogen atoms

Robert C. Forrey, Alex Dalgarno, Yulian V. Vanne, Alejandro Saenz, Piotr Froelich

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Previous calculations of low-temperature cross sections for collisions between spin-polarized metastable hydrogen atoms are improved to include nonadiabatic radial and angular coupling at large interatomic separations. The electrostatic dipole-quadrupole interaction produces nonadiabatic radial coupling between (2s,2p) and (2p,2p) states, while the Coriolis interaction produces nonadiabatic angular coupling. Both of these long-range contributions are handled in a space-fixed atomic gauge that is particularly convenient for a spin-polarized system. The improved theoretical results are compared with an existing experiment.

Original languageEnglish (US)
Article number052709
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number5
StatePublished - Nov 29 2007

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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