Title :
Direct measurement of positronium hyperfine splitting — Testing fundamental physics with sub-THz gyrotron
Author :
Miyazaki, A. ; Yamazaki, T. ; Suehara, T. ; Namba, T. ; Asai, S. ; Kobayashi, T. ; Saito, H. ; Idehara, T. ; Ogawa, I. ; Sabchevski, S.
Author_Institution :
Dept. of Phys., Univ. of Tokyo, Tokyo, Japan
Abstract :
The direct transition from o-Ps to p-Ps was firstly observed, using a gyrotron, a mode-converter and a Fabry-Pérot cavity. The Einstein´s A coefficient is measured as 3.9 (+1.8 -1.7) · 10-8 s-1. It is the first step to directly examine a reported discrepancy of positronium hyperfine splitting.
Keywords :
gyrotrons; microwave measurement; positronium; Einstein A coefficient; Fabry-Perot cavity; mode-converter; positronium hyperfine splitting direct measurement; sub-THz gyrotron; Cavity resonators; Educational institutions; Gyrotrons; Magnetic field measurement; Mirrors; Physics; Resonant frequency;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6104758
