The 3P3 state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 3P3 level is a simple pathway for producing metastable 2S3 positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 3P3 state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.
Mariazzi S., Caravita R., Aghion S., Amsler C., Antonello M., Belov A., et al. (2019). Production of long-lived positronium states via laser excitation to 33P level. American Institute of Physics Inc. [10.1063/1.5135827].
Production of long-lived positronium states via laser excitation to 33P level
Prevedelli M.;
2019
Abstract
The 3P3 state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 3P3 level is a simple pathway for producing metastable 2S3 positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 3P3 state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.| File | Dimensione | Formato | |
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