A Study of Positron Properties in Quartz Crystals and Synthetic Silica Glass

• Authors: W. Anwand , G. Brauer , M. Hasegawa , O. Dersch , F. Rauch
• Languages of publication: EN

Abstracts

EN

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 to 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.

Keywords

EN

78.70.Bj

Discipline

• 78.70.Bj: Positron annihilation(for positron states, see 71.60.+z in electronic structure of bulk materials; for positronium chemistry, see 82.30.Gg in physical chemistry and chemical physics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 321-328

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

W. Anwand

• Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Postfach 51 01 19, 01314 Dresden, Germany

author

G. Brauer

• Institut für Ionenstrahlphysik und Materialforschung, Forschungszentrum Rossendorf, Postfach 51 01 19, 01314 Dresden, Germany

author

M. Hasegawa

• Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

author

O. Dersch

• Institut für Kernphysik, Universität Frankfurt, August-Euler-Str. 6, 60486 Frankfurt/Main, Germany

author

F. Rauch

• Institut für Kernphysik, Universität Frankfurt, August-Euler-Str. 6, 60486 Frankfurt/Main, Germany

References

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• 7. A. van Veen, H. Schut, J. de Vries. R.A. Hakvoort, M.R. Ijpma, in: Positron Beams for Solids and Surfaces, Eds. P.J. Schultz, G.R. Massoumi, P.J. Simpson, AIP Conf. Proc., Vol. 218, American Institute of Physics, New York 1990, p. 171
• 8. O. Dersch, F. Rauch, Fresenius J. Anal. Chem., 365, 114, 1999

Identifiers

DOI

10.12693/APhysPolA.99.321