The Evidence of Quasi-Free Positronium State in GiPS-AMOC Spectra of Glycerol

• Authors: D. Zvezhinskiy , M. Butterling , A. Wagner , R. Krause-Rehberg , S. Stepanov
• Languages of publication: EN

Abstracts

EN

We present the results of processing of age-momentum correlation spectra that were measured for glycerol by the gamma-induced positron spectroscopy facility. Our research has shown that the shape of experimental s(t) curve cannot be explained without introduction of the intermediate state of positronium (Ps), called quasi-free Ps. This state yields the wide Doppler line near zero lifetimes. We discuss the possible properties of this intermediate Ps state from the viewpoint of developed model. The amount of annihilation events produced by quasi-free Ps is estimated to be less than 5% of total annihilations. In the proposed model, quasi-free Ps serves as a precursor for trapped Ps of para- and ortho-states.

Keywords

EN

78.70.Bj; 82.30.Gg; 34.80.-i; 34.80.Lx

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)
• 82.30.Gg: Positronium chemistry(see also 36.10.Dr Positronium in atomic and molecular physics; 78.70.Bj Positron annihilation in interactions of particles and radiation with matter)
• 34.80.-i: Electron and positron scattering
• 34.80.Lx: Recombination, attachment, and positronium formation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 125
• Issue: 3
• Pages: 821-824

Dates

published

2014-03

Contributors

author

D. Zvezhinskiy

• Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218, Moscow, Russia
• Moscow Engineering and Physics Institute, Dept. of Extreme States of Condensed Media, 115409, Moscow, Russia

author

M. Butterling

• Institute of Radiation Physics, Helmholtz-Zentrum, Dresden-Rossendorf P.O. Box 510119, 01314, Dresden, Germany

author

A. Wagner

• Institute of Radiation Physics, Helmholtz-Zentrum, Dresden-Rossendorf P.O. Box 510119, 01314, Dresden, Germany

author

R. Krause-Rehberg

• Martin-Luther-University Halle-Wittenberg, Dept. of Physics, 06099, Halle, Germany

author

S. Stepanov

• Institute for Theoretical and Experimental Physics, B. Cheremushkinskaya 25, 117218, Moscow, Russia
• Moscow Engineering and Physics Institute, Dept. of Extreme States of Condensed Media, 115409, Moscow, Russia

References

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Identifiers

DOI

10.12693/APhysPolA.125.821