POSITRON BACKSCATTERING PROBABILITIES FROM SOLID-SURFACES AT 2-30 KEV

被引：52

作者：

MAKINEN, J

PALKO, S

MARTIKAINEN, J

HAUTOJARVI, P

机构：

[1] Lab. of Phys., Helsinki Univ. of Technol., Espoo

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1992年 / 4卷 / 36期

关键词：

D O I：

10.1088/0953-8984/4/36/006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A measurement of the total positron backscattering probabilities using a magnetically guided positron beam is reported. Backscattering yields were measured as a function of the incident positron energy in the range 2-30 keV and the atomic number Z of the target (6 less-than-or-equal-to Z less-than-or-equal-to 79). Absolute backscattering probabilities extracted from the annihilation count rates at the target are compared with doubly differential measurements at 35 keV. The total backscattering ratios from these two measurements agree within the experimental uncertainties. The experimental backscattering probabilities compare well with Monte Carlo simulations of keV positron slowing in solids.

引用

页码：L503 / L508

页数：6

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