Chin. Phys. Lett.  1993, Vol. 10 Issue (11): 684-687    DOI:
Original Articles |
Observation of Spin-Conversion of Positronium in Zeolite
CHEN Zhiquan;WANG Shaojie (S. J. Wang)
Department of Physics, Wuhan University, Wuhan 430072
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CHEN Zhiquan, WANG Shaojie (S. J. Wang) 1993 Chin. Phys. Lett. 10 684-687
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Abstract We have measured the positron lifetime spectra of zeolite 13X as a function of exposed air pressure. Four lifetime components have been obtained and properly assigned. The longer lifetimes τ3 and τ4, are attributed to ortho-positronium annihilating in the β-cage and supercage in zeolite respectively. More interesting observation is that the positron annihilation parameters vary significantly with the exposed air pressure. It is interpreted in terms of the spin-conversion of positronium with paramagnetic oxygen.

Keywords: 78.70.Bj      82.65.-i     
Published: 01 November 1993
PACS:  78.70.Bj (Positron annihilation)  
  82.65.-i  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y1993/V10/I11/0684
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CHEN Zhiquan
WANG Shaojie (S. J. Wang)
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