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23 April 2024

» arxiv » 1602.5376

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Determination of the 3gamma fraction from positron annihilation in mesoporous materials for symmetry violation experiment with J-PET scanner
B. Jasińska ; M. Gorgol ; M. Wiertel ; R. Zaleski ; D. Alfs ; T. Bednarski ; P. Białas ; E. Czerwiński ; K. Dulski ; A. Gajos ; B. Głowacz ; D. Kamińska ; Ł. Kapłon ; G. Korcyl ; P. Kowalski ; T. Kozik ; W. Krzemień ; E. Kubicz ; M. Mohammed ; Sz. Niedźwiecki ; M. Pałka ; L. Raczyński ; Z. Rudy ; O. Rundel ; N.G. Sharma ; M. Silarski ; A. Słomski ; A. Strzelecki ; A.Wieczorek ; W. Wiślicki ; B. Zgardzińska ; M. Zieliński ; P. Moskal ;
Date:	17 Feb 2016
Abstract:	Various mesoporous materials were investigated to choose the best material for experiments requiring high yield of long-lived positronium. We found that the fraction of 3gamma annihilation determined using gamma-ray energy spectra and positron annihilation lifetime spectra (PAL) changed from 20% to 25%. The 3gamma fraction and o-Ps formation probability in the polymer XAD-4 is found to be the largest. Elemental analysis performed using scanning electron microscop (SEM) equipped with energy-dispersive X-ray spectroscop EDS show high purity of the investigated materials.
Source:	arXiv, 1602.5376
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