Localized positronium atoms in porous structures studied by 2D-ACAR |
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| Authors: | A Uedono S Tanigawa |
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| Institution: | (1) Present address: Research Center for Advanced Science and Technology, University of Tokyo, 4-6-1, Komaba, Meguro-ku, 153 Tokyo, Japan;(2) Institute of Materials Science, University of Tsukuba, Tsukuba, 305 Ibaraki, Japan |
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| Abstract: | The localization of positronium (Ps) atoms was studied by measurements of two-dimensional angular correlation of positron annihilation radiation (2D-ACAR) for porous glasses. Annihilations of positron-electron pairs with a large anisotropy were found in 2D-ACAR spectra. This fact can be attributed to the momentum uncertainty due to the localization of Ps in a finite dimension of pores. The present investigation showed the possibility of the detection of microstructures in amorphous materials by the 2D-ACAR technique. |
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