Void Nucleation and Positronium Formation in Alumina Single Crystal

• 作者: Tadao lwata
• 来源期刊: 原子核物理：英文版
• 学科: 物理学
• 关键词: α-Al₂O₃ Fast neutron irradiation POSITRON LIFETIME VOID POSITRONIUM
• 年，卷（期）: 1997,（3）
• 页码范围: 177-179
• 页数: 3页
• 分类号: O4

摘要

【正】 Void nucleation and positronium formation are studied by positron annihilationlifetime technique in α-Al₂O₃ irradiated by E_n≥1 MeV fast neutrons to a fluence of 3×10²⁰ n/cm².The voids of 0.7 nm are observed in the irradiated α-Al₂O₃ after the post-irradiationannealing at 850℃ and the positronium is formed in the voids.