Cassidy, DB;
Hisakado, TH;
Tom, HWK;
Mills, AP;
(2012)
Optical spectroscopy of molecular positronium.
Physical Review Letters
, 108
(13)
, Article 133402. 10.1103/PhysRevLett.108.133402.
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Abstract
We report optical spectroscopic measurements of molecular positronium (Ps ), performed via a previously unobserved L=1 excited state. Ps molecules created in a porous silica film, and also in vacuum from an Al(111) crystal, were resonantly excited and then photoionized by pulsed lasers, providing conclusive evidence for the production of this molecular matter-antimatter system and its excited state. Future experiments making use of the photoionized vacuum L=1 Ps could provide a source of Ps ions, as well as other multipositronic systems, such as Ps H or Ps O. © 2012 American Physical Society.
| Type: | Article |
|---|---|
| Title: | Optical spectroscopy of molecular positronium |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.108.133402 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.108.133402 |
| Language: | English |
| Additional information: | © 2012 American Physical Society |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1362293 |
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