Observation of Spin-Conversion of Positronium in Zeolite

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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	WANG Shaojie (S. J. Wang)

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