Abstract
Positronium is an ideal system for the research of the bound state QED. The hyperfine splitting of positronium (Ps-HFS, about 203 GHz) is an important observable but all previous measurements of Ps-HFS had been measured indirectly using Zeeman splitting. There might be the unknown systematic errors on the uniformity of magnetic field. We are trying to measure Ps-HFS directly using sub-THz radiation. We developed an optical system to accumulate high power (about 10 kW) radiation in a Fabry-Pérot resonant cavity and observed the positronium hyperfine transition for the first time.
Original language | English |
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Pages (from-to) | 141-147 |
Number of pages | 7 |
Journal | Hyperfine Interactions |
Volume | 212 |
Issue number | 1-3 |
DOIs | |
Publication status | Published - 2012 Dec |
Externally published | Yes |
Keywords
- Hyperfine splitting
- Positronium
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Nuclear and High Energy Physics
- Condensed Matter Physics
- Physical and Theoretical Chemistry