The influence of hydrogen concentration on positron lifetime and electrical resistivity in vanadium-hydrogen systems

• Autorzy: Pietrzak R. , Szatanik R.
• Języki publikacji: EN

Abstrakty

EN

Positron lifetime spectra and electrical resistivity of the vanadium-hydrogen systems with hydrogen concentration ranging from 0 to 0.29 at.H/at.V have been investigated. The range of hydrogen concentrations under investigation included the single alfa phase and a mixture of the alfa and beta phases of V-H system. The registered positron lifetime spectra were analysed by decomposition into two components. A distinct change in the annihilation parameters has been found after exceeding the boundary concentration of hydrogen in vanadium corresponding to the phase transition alfa (alfa+ beta). Correlation of changes in the parameters of the positron lifetime spectrum and in the electrical resistivity resulting from the changes in hydrogen concentration, has been revealed.

Słowa kluczowe

EN

positron lifetime; resistivity; V-H system; annihilation parameters

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2010
• Tom: Vol. 55, No. 1
• Strony: 35--39
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Pietrzak R.

autor

Szatanik R.

• Institute of Physics, Opole University, 48 Oleska Str., 45-052 Opole, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Bambikidis G (ed) (1981) Metal hydrides. NATO ASI Series B, Physics, Vol. 76. Plenum Press, New York, p 5
• 2. Čižek J, Procházka I, Becvar F et al. (2004) Hydrogen--induced defects in bulk niobium. Phys Rev B 69:224106–224119
• 3. Čižek J, Procházka I, Brauer G et al. (2007) Hydrogen interaction with vacancies in electron irradiated niobium. Acta Phys Pol A 113:1293–1300
• 4. Hasegawa M, Koike S, Hirabayashi M, Asano H, Suzuki T (1979) Angular correlation of positron annihilation radiation from single crystals of vanadium-deuter alloys. J Phys Soc Japan 46:481–487
• 5. Hautojarvi P, Huomo H, Puska M, Vehanen A (1985)Vacancy recovery and vacancy-hydrogen interaction in niobium and tantalum studied by positrons. Phys Rev B 32:4326–4331
• 6. Kansy J (1996) Microcomputer program for analysis of positron annihilation lifetime spectra. Nucl Instrum Methods A 374:235–244
• 7. Mantl S, Trifthauser W (1975) Direct evidence for vacancy clustering in electron irradiated copper by positron annihilation. Phys Rev Lett 34:1554–1557
• 8. Pietrzak R, Frączek D, Szatanik R (2009) The influence of external uniaxial stretching on the electromigration and diffusion of hydrogen in iron. J Phys Chem Solids 70:588–594
• 9. Puska M, Nieminen R (1983) Defect spectroscopy with positrons: a general calculational method. J Phys F: Metal Phys 13:333–346
• 10. Seger A (1997) Chalenges to positron and positronium physics by material science. Mater Sci Forum 1:1–34