Efficient $2^{3}S$ positronium production by stimulated decay from the $3^{3}P$ level

Abstract

We investigate experimentally the possibility of enhancing the production of $2^{3}S$ positronium atoms by driving the $1^{3}S$-$3^{3}P$ and $3^{3}P$-$2^{3}S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^{3}P$ to $2^{3}S$. The decay of $3^{3}P$ positronium atoms towards the $2^{3}S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The dependence of the stimulating transition efficiency on the intensity of the IR pulse has been measured to find the optimal enhancement conditions. A maximum relative increase of $\times (3.1\pm 1.0)$ in the $2^{3}S$ production efficiency, with respect to the case where only spontaneous decay is present, was obtained.

arXiv comment6 pages, 4 figures

References in corpus (5)

• Precision physics of simple atoms: QED tests, nuclear structure and fundamental constants
• Studying Antimatter Gravity with Muonium
• Velocity selected production of $2^{3}S$ metastable positronium
• Producing long-lived $2^3\text{S}$ Ps via $3^3\text{P}$ laser excitation in magnetic and electric fields
• Possibility of forming a stable Bose-Einstein condensate of $2{}^3{S}_1$ positronium atoms

Cited by in corpus (3)

• Toward inertial sensing with a monochromatic $2^{3}S$ positronium beam
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• J-PET detection modules based on plastic scintillators for performing studies with positron and positronium beams