Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments

microcrystalline powders and zeolites

Z. Kajcsos, L. Liszkay, L. Varga, K. Lázár, G. Brauer, C. Dauwe

Research output: Chapter in Book/Report/Conference proceedingChapter

15 Citations (Scopus)

Abstract

Positron annihilation methods concentrate on 2γ-annihilation, even though 3γ-annihilation often plays a considerable role. Distortions introduced by the time resolution-optimizing selection of narrow energy windows (taking only the upper part of the energy spectrum of the stop signals) in positron lifetime spectroscopy employing fast plastic scintillators and by analyzing the 0.511 MeV region alone in the Doppler-effect measurements were investigated here. Positron data collected for materials with Ps-hosting features (fine powders of MgO, Al2O3, SiO2 and zeolites) will be discussed from these aspects. It was found that the long lifetimes and their intensities may well differ in dependence on the energy settings. Significant differences found in the energy spectra of the annihilation radiation for 2γ- and 3γ- annihilation were also analyzed determining the respective statistical utility rates.

Original languageEnglish
Title of host publicationMaterials Science Forum
PublisherTrans Tech Publ
Pages959-962
Number of pages4
Volume175-178
Editionpt 2
Publication statusPublished - 1995
EventProceedings of the 10th International Conference on Positron Annihilation. Part 1 (of 2) - Beijing, China
Duration: May 23 1994May 29 1994

Other

OtherProceedings of the 10th International Conference on Positron Annihilation. Part 1 (of 2)
CityBeijing, China
Period5/23/945/29/94

Fingerprint

Zeolites
Positron annihilation
Positrons
Powders
Doppler effect
Phosphors
Experiments
Spectroscopy
Plastics
Radiation

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Kajcsos, Z., Liszkay, L., Varga, L., Lázár, K., Brauer, G., & Dauwe, C. (1995). Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments: microcrystalline powders and zeolites. In Materials Science Forum (pt 2 ed., Vol. 175-178, pp. 959-962). Trans Tech Publ.

Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments : microcrystalline powders and zeolites. / Kajcsos, Z.; Liszkay, L.; Varga, L.; Lázár, K.; Brauer, G.; Dauwe, C.

Materials Science Forum. Vol. 175-178 pt 2. ed. Trans Tech Publ, 1995. p. 959-962.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kajcsos, Z, Liszkay, L, Varga, L, Lázár, K, Brauer, G & Dauwe, C 1995, Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments: microcrystalline powders and zeolites. in Materials Science Forum. pt 2 edn, vol. 175-178, Trans Tech Publ, pp. 959-962, Proceedings of the 10th International Conference on Positron Annihilation. Part 1 (of 2), Beijing, China, 5/23/94.
Kajcsos Z, Liszkay L, Varga L, Lázár K, Brauer G, Dauwe C. Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments: microcrystalline powders and zeolites. In Materials Science Forum. pt 2 ed. Vol. 175-178. Trans Tech Publ. 1995. p. 959-962
Kajcsos, Z. ; Liszkay, L. ; Varga, L. ; Lázár, K. ; Brauer, G. ; Dauwe, C. / Mixing of 2γ- and 3γ- events in the data collection of positron annihilation experiments : microcrystalline powders and zeolites. Materials Science Forum. Vol. 175-178 pt 2. ed. Trans Tech Publ, 1995. pp. 959-962
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