2016/01/01 by B. Jasińska, M. Gorgol, M. Wiertel +31 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Annihilation #Fraction (chemistry) #Mesoporous material #Muon and positron interactions and applications #Polymer Nanocomposite Synthesis and Irradiation #Polymer crystallization and properties #Positron #Positron annihilation #Scanner #Symmetry (geometry) #Yield (engineering) #nucl-ex #physics.ins-det
paper · pdf · doi:10.5506/aphyspolb.47.453
12 pages, 2 figures
openalex publication_date 2016/01/01 · arxiv created 2016/02/17 · openalex created_date 2016/06/24 · arxiv updated 2019/05/22 · openalex updated_date 2026/08/05
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 3γ annihilation determined using γ-ray energy spectra and positron annihilation lifetime spectra (PAL) changed from 20% to 25%. The 3γ fraction and o-Ps formation probability in the polymer XAD-4 is found to be the largest. Elemental analysis performed using scanning electron microscope (SEM) equipped with energy-dispersive X-ray spectroscope EDS shows high purity of the investigated materials.