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

Journal Article · Thu Nov 15 00:00:00 EST 2007 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.76.052709· OSTI ID:21028016

Forrey, Robert C; Dalgarno, Alex; Vanne, Yulian V; Saenz, Alejandro; Froelich, Piotr ^[1]

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1. Department of Physics, Pennsylvania State University, Berks Campus, Reading, Pennsylvania 19610-6009 (United States)

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.

• OSTI ID: 21028016
• Journal Information: Physical Review. A, Vol. 76, Issue 5; Other Information: DOI: 10.1103/PhysRevA.76.052709; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOM-ATOM COLLISIONS
ATOMS
COUPLING
CROSS SECTIONS
DIPOLES
HYDROGEN
INTERACTIONS
METASTABLE STATES
POTENTIAL ENERGY
QUADRUPOLE MOMENTS
QUADRUPOLES
SPIN
SPIN ORIENTATION
TEMPERATURE RANGE 0065-0273 K