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Reaction of Positronium with Proton in Ultra-stable Y Zeolite Studied by Positrons |
| ZHU Jun1;MA Li1;WANG Shao-Jie1;LUO Xi-Hui2 |
| 1Department of Physics, Wuhan University, Wuhan 430072
2Fushun Research Institute of Petroleum and Petrochemicals, Fushun 113001
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| Cite this article: |
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ZHU Jun, MA Li, WANG Shao-Jie et al 2000 Chin. Phys. Lett. 17 134-136 |
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Abstract The positron annihilation lifetime spectra were measured as a function of the heating temperature for the ultra-stable Y (USY) zeolites. The lifetime spectra were well resolved into five lifetime components, and the longer lifetimes т3, т4 and т5 are assigned to ortho-positronium annihilating in the β-cage, super-cage and the second pore in USY zeolite, respectively. The interesting observation is that the annihilation rate λ5 (the reciprocal of The т5) of the fifth component increases and its intensity I5 decreases with the increasing heating temperature. The result is interpreted in terms of the increase in proton and the reaction between the positronium and proton in USY zeolite after heated.
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78.70.Bj
82.65.-i
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Published: 01 February 2000
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