Y. Urushizaki

Gyrotron FU CW V for hyperfine structure measurement on positronium

T. Suehara, T. Idehara, I. Ogawa, 2009, International Conference on Infrared, Millimeter, and Terahertz Waves.

New Experiment for the First Direct Measurement of Positronium Hyperfine Splitting with Sub-THz Light

S. Asai, T. Suehara, Tomio Kobayashi, 2010 .

Probing the energy structure of positronium with a 203 GHz Fabry-Perot Cavity

S. Asai, T. Suehara, T. Idehara, 2010, 1007.0834.

Precise measurement of the HFS of positronium using the zeeman effect I: Experimental set-up and RF system

G. Akimoto, S. Asai, Y. Sasaki, 2010 .

Precise measurement of HFS of positronium using Zeeman effect

G. Akimoto, S. Asai, Y. Sasaki, 2010 .

Experiment for the first direct measurement of the hyperfine splitting of positronium

S. Asai, T. Suehara, M. Yoshida, 2010 .

First observation of o-Ps to p-Ps transition and first direct measurement of positronium hyperfine splitting with sub-THz light

S. Asai, T. Suehara, Tomio Kobayashi, 2011, 1105.4352.

Detection of the Direct Hyperfine Transition of Positronium Atoms using sub-THz High-power Radiation

G. Akimoto, S. Asai, T. Yamazaki, 2010, 1007.0843.