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Thomas Pohl

New interpretations of measured antihydrogen velocities and field ionization spectra

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  • T. Pohl
  • H.R. Sadeghpour
  • ,
  • G. Gabrielse

We present extensive Monte Carlo simulations, showing that cold antihydrogen ((H) over bar) atoms are produced when antiprotons ((p) over bar) are gently heated in the side wells of a nested Penning trap. The observed (H) over bar with high energies, that had seemed to indicate otherwise, are instead explained by a surprisingly effective charge-exchange mechanism. We shed light on the previously measured field-ionization spectrum, and reproduce both the characteristic low-field power law as well as the enhanced (H) over bar production at higher fields. The latter feature is shown to arise from (H) over bar atoms too deeply bound to be described as guiding center atoms, atoms with internally chaotic motion.

Original languageEnglish
Article number143401
JournalPhysical Review Letters
Number of pages4
Publication statusPublished - 6 Oct 2006

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