Data di Pubblicazione:
2008
Citazione:
Efficient positronium laser excitation for antihydrogen production in a magnetic field / F. Castelli, I. Boscolo, S. Cialdi, M.G. Giammarchi, D. Comparat. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 78:5(2008), p. 052512.052512.
Abstract:
Antihydrogen production by charge exchange reaction between positronium Ps atoms and antiprotons
requires an efficient excitation of Ps atoms up to high-n levels Rydberg levels . In this study it is assumed that
a Ps cloud is produced within a relatively strong uniform magnetic field 1 T and with a relatively high
temperature 100 K . Consequently, the structure of energy levels are deeply modified by Zeeman and motional
Stark effects. A two-step laser light excitation, the first one from ground to n=3 and the second from this
level to a Rydberg level, is proposed and the physics of the problem is discussed. We derive a simple formula
giving the absorption probability with substantially incoherent laser pulses. A 30% population deposition in
high-n states can be reached with feasible lasers suitably tailored in power and spectral bandwidth.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
F. Castelli, I. Boscolo, S. Cialdi, M.G. Giammarchi, D. Comparat
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