Investigation of the abnormally-high annihilation rate of ortho-positronium in iodomethane gas

碘甲烷气体中正正电子素异常高湮灭率的研究

• 批准号: 23740310
• 负责人: WADA Ken
• 金额: $ 2.91万
• 依托单位: High Energy Accelerator Research Organization
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23740310/
• 关键词: 原子; 分子; 陽電子消滅; ポジトロニウム; 多孔性材料; 機能性分離膜; 原子・分子

Although the mechanism of the abnormally high annihilation rate of ortho-positronium in iodomethane gas has not been revealed, a fundamental proportional relationship between the pick-off quenching cross-section and the geometrical cross section derived from the viscosity has been found for all the gaseous atoms and molecules previously reported through the study. Based on this result, a practical theory, which relates the positronium lifetime to the average size of free spaces in which positronium trapped, has been proposed.

虽然对碘甲烷气体中正电子离子异常高湮灭速率的机理尚未揭示，但通过研究发现了以往报道的所有气态原子和分子的吸灭截面与由黏度推导出的几何截面之间的基本比例关系。在此基础上，提出了一个将正电子寿命与正电子捕获的自由空间的平均大小联系起来的实用理论。

项目成果

A simple shape-free model for pore-size estimation with positron annihilation lifetime spectroscopy

• DOI: 10.1088/1742-6596/443/1/012003
• 发表时间: 2013-06
• 期刊: Journal of Physics: Conference Series
• 作者: K. Wada;T. Hyodo

ポジトロニウムの寿命測定による空孔サイズ評価の新しいモデル

通过测量正电子素寿命来评估孔径的新模型

• 发表时间: 2012
• 作者: 和田健;兵頭俊夫
• 通讯作者: 兵頭俊夫

Application of positronium annihilation lifetime spectroscopy for the evaluation of the seize of the free space in porous materials

正电子湮灭寿命光谱在多孔材料自由空间捕获评估中的应用

• 发表时间: 2012
• 作者: 和田健;兵頭俊夫;K. Wada and T. Hyodo
• 通讯作者: K. Wada and T. Hyodo

A simple model for the PALS evaluation of pore size in porous materials

多孔材料孔径 PALS 评估的简单模型

• 发表时间: 2012
• 作者: Shinya Yanagimachi;Ken Hagimoto;Takeshi Ikegami;K. Wada;Shinya Yanagimachi;K. Wada and T. Hyodo;Shinya Yanagimachi;K. Wada and T. Hyodo
• 通讯作者: K. Wada and T. Hyodo

Correlation of pick-off annihilation cross section and the collisional cross section for Ps-atom/molecule collisions

Ps 原子/分子碰撞的拾取湮没截面与碰撞截面的相关性

• 发表时间: 2012
• 作者: 和田健;兵頭俊夫;K. Wada and T. Hyodo;K. Wada and T. Hyodo
• 通讯作者: K. Wada and T. Hyodo