¤ OpenAccess: Hybrid

This work has “Hybrid” OA status. This means it is free under an open license in a toll-access journal.

Velocity-selected production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mmultiscripts><mml:mi mathvariant="normal">S</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mspace width="0.16em" /><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> metastable positronium

Claude Amsler,Massimiliano Antonello,Alexander S. Belov,Germano Bonomi,R. S. Brusa,M. Caccia,A. Camper,R. Caravita,F. Castelli,G. Cerchiari,D. Comparat,G. Consolati,A. Demetrio,L. Di Noto,M. Doser,M. Fanì,S. Gerber,A. Gligorova,F. Guatieri,P. Hackstock,S. Haider,A. Hinterberger,H. Holmestad,A. Kellerbauer,O. Khalidova,D. Krasnický,V. Lagomarsino,P. Lansonneur,P. Lebrun,C. Malbrunot,S. Mariazzi,V. Matveev,Simon Müller,G. Nebbia,P. Nédélec,Markus K. Oberthaler,D. Pagano,L. Penasa,Vojtěch Petráček,F. Prelz,M. Prevedelli,B. Rienäcker,J. Robert,Ole Røhne,Alberto Rotondi,Heidi Sandaker,R. Santoro,L. Smestad,F. Sorrentino,G. Testera,I. C. Tietje,E. Widmann,P. Yzombard,Christian Zimmer,Nicola Zurlo

Positronium

Physics

Metastability

2019

Positronium in the 2 3 S metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns), making it a promising candidate for interferometry experiments with a neutral matter-antimatter system.In the present work, 2 3 S positronium is produced, in the absence of an electric field, via spontaneous radiative decay from the 3 3 P level populated with a 205-nm UV laser pulse.Thanks to the short temporal length of the pulse, 1.5 ns full width at half maximum, different velocity populations of a positronium cloud emitted from a nanochanneled positron-positronium converter were selected by delaying the excitation pulse with respect to the production instant. 2 3 S positronium atoms with velocity tuned between 7 × 10 4 ms -1 and 10 × 10 4 ms -1 were thus produced.Depending on the selected velocity, a 2 3 S production efficiency ranging from ∼0.8% to ∼1.7%, with respect to the total amount of emitted positronium, was obtained.The observed results give a branching ratio for the 3 3 P-2 3 S spontaneous decay of (9.7 ± 2.7)%.The present velocity selection technique could allow

Cite this:

Generate Citation

“Velocity-selected production of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>2</mml:mn><mml:mmultiscripts><mml:mi mathvariant="normal">S</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mspace width="0.16em" /><mml:mn>3</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math> metastable positronium” is a paper by Claude Amsler Massimiliano Antonello Alexander S. Belov Germano Bonomi R. S. Brusa M. Caccia A. Camper R. Caravita F. Castelli G. Cerchiari D. Comparat G. Consolati A. Demetrio L. Di Noto M. Doser M. Fanì S. Gerber A. Gligorova F. Guatieri P. Hackstock S. Haider A. Hinterberger H. Holmestad A. Kellerbauer O. Khalidova D. Krasnický V. Lagomarsino P. Lansonneur P. Lebrun C. Malbrunot S. Mariazzi V. Matveev Simon Müller G. Nebbia P. Nédélec Markus K. Oberthaler D. Pagano L. Penasa Vojtěch Petráček F. Prelz M. Prevedelli B. Rienäcker J. Robert Ole Røhne Alberto Rotondi Heidi Sandaker R. Santoro L. Smestad F. Sorrentino G. Testera I. C. Tietje E. Widmann P. Yzombard Christian Zimmer Nicola Zurlo published in 2019. It has an Open Access status of “hybrid”. You can read and download a PDF Full Text of this paper here.