About NAMBA Toshio
About Univ. Tokyo, Tokyo, JPN
About Progress of Theoretical and Experimental Physics (Web)
About positronium
About quantum electrodynamics
About ground state
About micro structure
About precision measurement
About lifetime
About gamma detection
About Zeeman effect
About bound state
About hyperfine structure
About orthopositronium
About Exotic atoms and molecules
About ポジトロニウム
About 精密測定