|
|||||
|
|
Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique |
|
| Authors: | WANG Dan-Ni ZHANG Lan-Zhi WANG Bao-Yi YU Run-Sheng ZHANG Zhi-Ming LI Dao-Wu WEI Long |
| Institution: | Key Laboratory of Nuclear Analysis Techniques;Institute of High Energy Physics;CAS;Beijing 100049;China;Graduate University of Chinese Academy of Sciences;China |
| Abstract: | A high-performance positron age-momentum correlation (AMOC) spectrometer was newly devel- oped. The counting rate is increased up to 200 cps much larger than the value 20 cps reported by other international groups. And at the same time, the time resolution still keeps at the international level of 220 ps. Furthermore, positronium (Ps) annihilation in silica aerogel was investigated by AMOC, which indicates: (1) Ps annihilation between the grains dominantly undergoes pick-off process and spin conversion from... |
| Keywords: | positron age-momentum correlation positronium formation positron states silica aerogel |
| 本文献已被 CNKI 等数据库收录！ | |
| 点击此处可从《中国物理 C》浏览原始摘要信息 | |
| 点击此处可从《中国物理 C》下载免费的PDF全文 | |