The Effect of Visible Light Irradiation on Positronium Formation in Polyethylene at Low Temperature

• Authors: Y. Ito , T. Hirade , E. Hamada , T. Suzuki , Y. Ito
• Languages of publication: EN

Abstracts

EN

The effect of visible light exposing on the ortho-positronium formation in polyethylene was studied. Lifetime spectra of positrons in polyethylene were measured in the temperature range between 50 K and 370 K. It was observed that the visible light quenches the enhancement of ortho-positronium intensity (I_{3}) at lower temperature than ca. 250 K - the glass transition temperature of polyethylene. On the other hand, the lifetime of ortho-positronium component (τ_{3}) was not affected by the presence of the visible light.

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)

• Journal: Acta Physica Polonica A
• Year: 1999
• Volume: 95
• Issue: 4
• Pages: 533-538

Dates

published

1999-04

Contributors

author

Y. Ito

• High Energy Accelerator Research Organization (KEK), Tanasi-Branch, 3-2-1 Midori, Tanasi-si, Tokyo 188-8501, Japan

author

T. Hirade

• Department of Materials Science, Japan Atomic Energy Research Institute, Tokai, Naka, Ibaraki 319-1106, Japan

author

E. Hamada

• The Graduate University for Advanced Studies, High Energy Accelerator Research Organization (KEK), 1-1, Oho, Tsukuba, Ibaraki 305-0801, Japan

author

T. Suzuki

• High Energy Accelerator Research Organization (KEK), 1-1, Oho, Tsukuba, Ibaraki 305-0801, Japan

author

Y. Ito

• Research Center for Nuclear Science and Technology, University of Tokyo, Tokai, Naka, Ibaraki 319-1106, Japan

Identifiers

DOI

10.12693/APhysPolA.95.533