- Tytuł:
- Large numbers of cold positronium atoms created in laser-selected Rydberg states using resonant charge exchange
- Autorzy:
-
Storry, C. H.
Müllers, A.
Zieliński, Marcin
McConnell, R.
Gabrielse, G.
Richerme, P.
Kolthammer, W. S.
Hessels, E. A.
George, M. C.
Walz, J.
Grzonka, D.
Fitzakerley, D.
Weel, M. - Opis:
- Lasers are used to control the production of highly excited positronium atoms (Ps*). The laser light excites Cs atoms to Rydberg states that have a large cross section for resonant charge-exchange collisions with cold trapped positrons. For each trial with 30 million trapped positrons, more than 700 000 of the created Ps* have trajectories near the axis of the apparatus, and are detected using Stark ionization. This number of Ps* is 500 times higher than realized in an earlier proof-of-principle demonstration (2004 Phys. Lett. B 597 257). A second charge exchange of these near-axis Ps* with trapped antiprotons could be used to produce cold antihydrogen, and this antihydrogen production is expected to be increased by a similar factor.
- Dostawca treści:
- Repozytorium Uniwersytetu Jagiellońskiego
Artykuł