| 摘要 |
PROBLEM TO BE SOLVED: To inspect the electronic state of a material surface layer, the activity of catalytic action or the like by an atomic scale as well as with nano-second or higher time accuracy. SOLUTION: A pulsated low-speed proton ray 1 in a nano-second time domain is converged on and irradiated to the reverse side of a thin film type probe sample 2, while a probe 3 is moved along the upper surface of the probe sample 2 in such a state as kept in contact and faced thereto. Then, positronium molecules Psn (n>=2, integer) are generated in the contact gap. Thereafter, a coherent annihilation gamma ray is detected and the positronium molecules Psn are observed separately from positrons and positronium Ps, thereby probing the properties of a material surface layer, particularly the activity of catalytic action or the like by an atomic scale and with nano-second or higher time accuracy. |
