# 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

> Research article (Physical review. A/Physical review, A, 2019) · cited 29× · AI/ML

**Wikidata**: [openalex:W2886240753](https://www.wikidata.org/wiki/openalex:W2886240753)  
**Source**: https://4ort.xyz/entity/velocity-selected-production-of-mml-math-xmlns-mml-http-www-w3-org-1998-math-mathml-mml-mrow-mml-mn-2-mml-mn-mml-mmultis