Fine structure in cold collisions of spin-polarized H(2s) atoms

S. Jonsell, R. C. Forrey, A. Saenz, P. Froelich, A. Dalgarno

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


We have calculated cross sections and rate coefficients for elastic scattering, ionization, and double excitation transfer in collision of two hydrogen atoms in the 2s state. We find that for collision energies between 5 × 10-10 a.u. and 10-6 a.u. elastic scattering has the largest cross section. For temperatures below 0.02 K ionization is the dominant loss process, while for higher temperatures double excitation transfer dominates. Our results for the total loss rate are found to be within a factor 2 or 3 of the error bars of recent measurements.

Original languageEnglish (US)
Pages (from-to)299-301
Number of pages3
JournalPhysica Scripta T
StatePublished - 2004
EventXXIII International Conference on Photonic, Electronic, and Atomic Collisions, 23rd ICPEAC - Stockholm, Sweden
Duration: Jul 23 2003Jul 29 2003

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics
  • General Physics and Astronomy


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