Some remarks on positron/positronium diffusion models

• Autorzy: Świątkowski W.
• Języki publikacji: EN

Abstrakty

EN

Positrons thermalized near the sample boundary (as well as Ps atoms formed in the sample) can reach the boundary as a result of diffusive movement. Observations of such effects as positron reemission or positron surface trapping as well as positronium emission allow one to calculate respective diffusion lengths. From the presented analysis it follows that some models used in such calculations give quite wrong results.

Słowa kluczowe

EN

diffusion; diffusion length; positron; positronium

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2003
• Tom: Vol. 48, nr 3
• Strony: 141--144
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Świątkowski W.

• Institute of Experimental Physics, University of Wrocław, 9 M. Borna Sq., 50-204 Wrocław, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

• 1. Anwand W, Brauer G, Hasegawa M, Dersch O, Rauch F (2001) A study of positron properties in quartz crystals and synthetic silica glass. Acta Phys Pol A 99:321−328
• 2. Baranowski A, Ewertowski R, Świątkowski W (1991) Positron trapping rate coefficient for thermalized positrons at metaldielectric interface. Acta Phys Pol A 79:517−523
• 3. Bergersen B, Pajanne E, Kubica F, Stott MJ, Hodges CH (1974) Positron diffusion in metals. Solid State Commun 15:1377−1380
• 4. Berkurts KH, Wirtz K (1964) Neutron physics, 2nd ed. Springer Verlag, Berlin−Göttingen−Heidelberg−New York
• 5. Brandt W (1974) Positron dynamics in solids. Appl Phys 5:1−23
• 6. Brandt W, Paulin R (1972) Positron diffusion in solids. Phys Rev B 5:2430−2435
• 7. Dębowska M, Świątkowski W (1999) Some remarks on diffusion model of positron reemission and/or positron surface trapping. Acta Phys Pol A 95:515−520
• 8. Dupasquier A, Zecca A (1985) Atomic and physics experiments with slow-positron beams. Riv Nuovo Cimento 8:1−73
• 9. Schultz PJ, Lynn KG (1988) Interaction of positron beams with surfaces, thin films, and interfaces. Rev Mod Phys 60:701−779
• 10. Serna J (1990) Positronium diffusion in crystalline polyethylene. Phys Status Solidi A 122:489−493
• 11. Świątkowski W (1974) The possibility of using the metal−metal contact effects to investigate the slow positron diffusion. Nukleonika 19:79−83