Low Energy Cross-Sections for Positron Interactions with Cyclic Hydrocarbons

• Authors: G. Karwasz , D. Pliszka , R. Brusa , C. Perazzolli
• Languages of publication: EN

Abstracts

EN

We report total cross-section measurements for positron scattering on cyclic hydrocarbons: benzene, aniline, and cyclohexane. Measurements were done by an absolute transition method in the energy range 1.5-20 eV (0.4-20 eV for cyclohexane). High cross-sections for all measured molecules were observed at low energies. In the case of cyclohexane the cross-section in the zero energy limit tends to a constant value. In aniline a weakly accented peak slightly above the positronium formation threshold is observed. Similar but less visible bump was observed in the case of benzene. Measurement of total cross-sections in nitrogen and argon used for calibration of the apparatus are also presented.

Keywords

EN

34.85.+x; 39.90.+d

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 107
• Issue: 4
• Pages: 666-672

Dates

published

2005-04

received

2004-09-20

Contributors

author

G. Karwasz

• Dipartimento di Fisica, Università di Trento, 38050 Povo (TN), Italy

author

D. Pliszka

• Institute of Physics, Pomeranian Pedagogical Academy, 76-200 Słupsk, Poland

author

R. Brusa

• Dipartimento di Fisica, Università di Trento, 38050 Povo (TN), Italy

author

C. Perazzolli

• Dipartimento di Fisica, Università di Trento, 38050 Povo (TN), Italy

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Identifiers

DOI

10.12693/APhysPolA.107.666