Positronium reemission yield from mesostructured silica films - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2008

Positronium reemission yield from mesostructured silica films

Résumé

The reemission yield of ortho-positronium (o-Ps) into vacuum outside mesoporous silica films on glass is measured in reflection mode with a specially designed lifetime (LT) spectrometer. Values as high as 40% are found. The intensity of the 142ns vacuum LT is recorded as a function of reemission depth. The LT depth profiling is correlated to the 2γ and 3γ energy ones to determine the annihilation characteristics inside the films. Positron lifetime in capped films is used to determine the pore size. For the first time, a set of consistent fingerprints for positronium annihilation, o-Ps reemission into vacuum, and pore size, is directly determined in surfactant-templated mesoporous silica films.

Dates et versions

hal-01941918 , version 1 (02-12-2018)

Identifiants

Citer

L. Liszkay, C. Corbel, P. Perez, P. Desgardin, M.-F. Barthe, et al.. Positronium reemission yield from mesostructured silica films. Applied Physics Letters, 2008, 92 (6), pp.063114. ⟨10.1063/1.2844888⟩. ⟨hal-01941918⟩
52 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More