A study of positron properties in quartz crystals and synthetic silica glass

被引：7

作者：

Anwand, W

Brauer, G

Hasegawa, M

Dersch, O

Rauch, F

机构：

[1] Forschungszentrum Rossendorf EV, Inst Ionenstrahlphys & Mat Forsch, D-01314 Dresden, Germany

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany

来源：

ACTA PHYSICA POLONICA A | 2001年 / 99卷 / 3-4期

关键词：

D O I：

10.12693/APhysPolA.99.321

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The monoenergetic positron beamline "SPONSOR" at Rossendorf has been used to investigate the positron behaviour in a naturally grown Brasilian quartz, two synthetic quartz crystals of different origin, and synthetic silica glass. The measurements allow us to obtain the positron diffusion length of free positrons and Bloch para-positronium, if formed, in these materials. In addition, hydrothermal treatment of a synthetic quartz has been used to introduce hydrogen into the crystal up to a certain depth. The presence of hydrogen is found no influence the formation of para-positronium. The depth distribution of hydrogen has been measured independently by nuclear reaction analysis, and will be discussed in comparison with the results deduced from the positron studies.

引用

页码：321 / 328

页数：8

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