Migration Enthalpy of Thermal Vacancies by Positron Spectroscopy

Chin. Phys. Lett.

2005, Vol. 22

Issue (8): 1998-2001 DOI:

Original Articles

Migration Enthalpy of Thermal Vacancies by Positron Spectroscopy

Emad A. Badawi

Faculty of Science, Department of Physics, El-Minia University, El-Minia, Egypt

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Emad A. Badawi 2005 Chin. Phys. Lett. 22 1998-2001

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Abstract The trapping of positrons at vacancy site in some materials provide a new and sensitive method for the equilibrium determination of point defect migration enthalpy. Data are presented for commercial Al--Mg alloys and fitted to a model allowing presentation in the form of Arrhenius plots, hence the migration enthalpy H_iv^m can be determined by the positron annihilation lifetime technique. The results show that the value of H_iv^m increases as the concentration of Mg increases.

Keywords: 61.72.Hb 61.66.Dk 61.72.-y

Published: 01 August 2005

PACS:	61.72.Hb
	61.66.Dk	(Alloys )
	61.72.-y	(Defects and impurities in crystals; microstructure)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I8/01998

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