Structural subnanovoids in silica-based glasses probed by positronium

Koji Inoue, Yasuyoshi Nagai, Yuzuru Sasaki, Zheng Tang, Hideaki Ohkubo, Masuyuki Hasegawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Structural subnanovoids in silica-based glasses with various glass former contents are systematically studied using positronium (Ps) as a probe. The average sizes of the structural subnanovoids are estimated from the 2D-ACAR (two-dimensional angular correlation of positron annihilation radiation) momentum distribution of para-positronium (p-Ps) and from the pick-off annihilation rates of ortho-positronium (o-Ps) in the subnanovoids. The sizes of the subnanovoids decrease almost linearly with the glass former molar content. This finding gives us useful and unique information about the structural subnanovoids and suggests the possible tool for the study of the stability of nuclear radioactive waste glass during long-term storage.

Original languageEnglish
Title of host publicationPositron Annihilation
Subtitle of host publicationProceedings of the 13th International Conference on Positron Annihilation, ICPA-13
EditorsToshio Hyodo, Haruo Saito, Yoshinori Kobayashi, Yasuyuki Nagashima
PublisherTrans Tech Publications Ltd
Pages304-306
Number of pages3
ISBN (Print)9780878499366
DOIs
Publication statusPublished - 2004
EventPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13 - Kyoto, Japan
Duration: 2003 Sep 72003 Sep 12

Publication series

NameMaterials Science Forum
Volume445-446
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Other

OtherPositron Annihilation: Proceedings of the 13th International Conference on Positron Annihilation, ICPA-13
CountryJapan
CityKyoto
Period03/9/703/9/12

Keywords

  • Glass
  • Momentum Distribution
  • Nanovoids
  • Positron Lifetime
  • Ps

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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