Monte Carlo simulation of the positron implantation profiles in the layered samples

• Autorzy: Dryzek J. , Horodek P.
• Języki publikacji: EN

Abstrakty

EN

Theoretical studies of the positron implantation profiles in the layered samples are presented. Simulations performed using a GEANT4 tool kit revealed accumulation of positrons in denser layer embedded by less dens environment. This effect is significant for implantation profiles of slow positrons formed in a beam. Nevertheless, it is also present in conventional experiments, where positrons are emitted from radioactive nuclei. In some cases the diffusion process, which follows the implantation and thermalization processes, can smear this effect. However, defects on the interfaces or differences in the positron affinity can sustain it.

Słowa kluczowe

EN

positron implantation; implantation profile; GEANT4 tool kit

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2010
• Tom: Vol. 55, No. 1
• Strony: 13--16
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Dryzek J.

autor

Horodek P.

• The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences, 152 Radzikowskiego Str., 31-342 Kraków, Poland and Institute of Physics, University of Zielona Góra, 4a Prof. Z. Szafrana Str., 65-516 Zielona Góra, Poland, Tel.:,

Bibliografia

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• 3. Brauer G, Anwand W (eds) (2002) Proceedings of the 9th Int Workshop on Slow-Positron Beam Techniques for Solids and Surfaces. Elsevier, Amsterdam
• 4. Dryzek J, Singleton D (2006) Implantation profile and linear absorption coefficients for positrons injected in solids from radioactive sources 22Na and 68Ge\68Ga. Nucl Instrum Methods B 252:197–204
• 5. Hugenschmidt C, Pikart P, Stadlbauer M, Scherckenbach K (2008) High elemental selectivity to Sn submonoleyers embedded in Al using positron annihilation spectroscopy. Phys Rev B 77:092105
• 6. Puska MJ, Lanki P, Nieminen RM (1989) Positron affinities for elemental metals. J Phys: Condens Matter 1:6081–60