To the Measurements of 3γ/2γ Ratio for Positron Annihilation in Matter Using Annihilation Energy Spectrum

• Authors: S. Andrukhovich , A. Berestov , N. Antovich , O. Metelitsa
• Languages of publication: EN

Abstracts

EN

Processes of the summation of cascadeγ-quanta usually neglected, when registering the annihilation energy spectrum for the determination of the three-photon annihilation probability P_{3γ} of positronium in samples, are studied. The deviations of the actual P_{3γ} value from that determined without allowance made for the summation processes are 56% and 25% for NaI(Tl) and Ge detectors placed at the distance of 3 cm from a positron source, respectively.

Keywords

EN

71.60.+z; 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)
• 71.60.+z: Positron states(for positron annihilation, see 78.70.Bj)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2001
• Volume: 99
• Issue: 3-4
• Pages: 315-320

Dates

published

2001-03/04

received

2000-09-18

Contributors

author

S. Andrukhovich

• Institute of Physics of the Belarusian Academy of Sciences, F. Skoriny Avenue 70, 220072 Minsk, Belarus

author

A. Berestov

• Institute of Physics of the Belarusian Academy of Sciences, F. Skoriny Avenue 70, 220072 Minsk, Belarus

author

N. Antovich

• Department of Physics, University of Montenegro, Podgorica, 81000, Montenegro

author

O. Metelitsa

• Institute of Nuclear Problems, Belarusian State University, Bobruiskaya Str., 11, 220050, Minsk, Belarus

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Identifiers

DOI

10.12693/APhysPolA.99.315