Performance of a High-Resolution Digital Positron-Lifetime Spectrometer

• Authors: F. Bečvář , J. Čížek , I. Procházka
• Languages of publication: EN

Abstracts

EN

This work describes a digital positron-lifetime spectrometer based on two ultrafast digitizers. Performance of the digital spectrometer in conditions of a routine measurement is compared with an analogue setup connected to the same detectors. It was found that engagement of the digital setup leads to an improvement of timing resolution (FWHM for ^{22}Na) from 169 ps for the traditional analogue setup to 146 ps for the digital setup. The coincidence count rate for 1.2 MBq ^{22}Na source is 75-80 coinc./s for both configurations. These results clearly demonstrate the advantages of the digital timing over the traditional analogue setup.

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: 2008
• Volume: 113
• Issue: 5
• Pages: 1279-1284

Dates

published

2008-05

received

2007-09-03

Contributors

author

F. Bečvář

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic

author

J. Čížek

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic

author

I. Procházka

• Faculty of Mathematics and Physics, Charles University in Prague, V Holešovičkách 2, Praha 8, CZ-180 00, Czech Republic

References

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• 2. H. Saito, Y. Nagashima, T. Kurihara, T. Hyodo, Nucl. Intrum. Methods Phys. Res. A 487, 612 (2002)
• 3. F. Bečvář, J.Čížek, L. Lešt'ák, I. Novotný, I. Procházka, F. Šebesta, Nucl. Instrum. Methods Phys. Res. A 443, 557 (2000)
• 5. A. Seeger, F. Banhart, Phys. Status Solidi A 102, 171 (1987)
• 4. F. Bečvář, Nucl. Instrum. Methods Phys. Res. B 261, 871 (2007)

Identifiers

DOI

10.12693/APhysPolA.113.1279