Producing long-lived 2 3S positronium via 3 3P laser excitation in magnetic and electric fields
Articolo
Data di Pubblicazione:
2018
Abstract:
Producing positronium (Ps) in the metastable 2 3
S state is of interest for various applications in fundamental
physics. We report here on an experiment in which Ps atoms are produced in this long-lived state by spontaneous
radiative decay of Ps excited to the 3 3
P level manifold. The Ps cloud excitation is obtained with a UV laser pulse
in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field
of 300 V cm−1. The evidence of the 2 3
S state production is obtained to the 3.6σ level of statistical significance
using a novel analysis technique of the single-shot positronium annihilation lifetime spectra. The dynamic of the
Ps population on the involved levels has been studied with a rate equation model.
S state is of interest for various applications in fundamental
physics. We report here on an experiment in which Ps atoms are produced in this long-lived state by spontaneous
radiative decay of Ps excited to the 3 3
P level manifold. The Ps cloud excitation is obtained with a UV laser pulse
in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field
of 300 V cm−1. The evidence of the 2 3
S state production is obtained to the 3.6σ level of statistical significance
using a novel analysis technique of the single-shot positronium annihilation lifetime spectra. The dynamic of the
Ps population on the involved levels has been studied with a rate equation model.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Atomic and Molecular Physics, and Optics
Elenco autori:
Aghion, S.; Amsler, C.; Antonello, M.; Belov, A.; Bonomi, G.; Brusa, R. S.; Caccia, M.; Camper, A.; Caravita, R.; Castelli, F.; Cerchiari, G.; Comparat, D.; Consolati, G.; Demetrio, A.; Di Noto, L.; Doser, M.; Evans, C.; Fanì, M.; Ferragut, R.; Fesel, J.; Fontana, A.; Gerber, S.; Giammarchi, M.; Gligorova, A.; Guatieri, F.; Hackstock, P.; Haider, S.; Hinterberger, A.; Holmestad, H.; Kellerbauer, A.; Khalidova, O.; Krasnický, D.; Lagomarsino, V.; Lansonneur, P.; Lebrun, P.; Malbrunot, C.; Mariazzi, S.; Marton, J.; Matveev, V.; Mazzotta, Z.; Müller, S. R.; Nebbia, G.; Nedelec, P.; Oberthaler, M.; Pagano, D.; Penasa, L.; Petracek, V.; Prelz, F.; Prevedelli, M.; Rienaecker, B.; Robert, J.; Røhne, O. M.; Rotondi, A.; Sandaker, H.; Santoro, R.; Smestad, L.; Sorrentino, F.; Testera, G.; Tietje, I. C.; Vujanovic, M.; Widmann, E.; Yzombard, P.; Zimmer, C.; Zmeskal, J.; Zurlo, N.
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