理学 >>> 物理学 >>> 理论物理学 声学 热学 光学 电磁学 无线电物理 电子物理学 凝聚态物理学 等离子体物理学 原子分子物理学 原子核物理学 高能物理学 计算物理学 应用物理学 物理学其他学科
搜索结果: 1-10 共查到物理学 Positron Annihilation相关记录10条 . 查询时间(0.14 秒)
Abstract: The life-time of the four-body atomic system MuPs ($\mu^{+} e^{-}_2 e^{+}$ or muonium-positronium) against positron annihilation has been evaluated as $\tau = \frac{1}{\Gamma} \approx 4.0763...
The cross section for electron-positron annihilation into hadrons allows for a precise determination of the strong coupling constant and the charm- and bottom-quark masses. Recent theoretical and expe...
Positron annihilation lifetime and Doppler broadening of annihilation line techniques have been used to obtain information about the small pore structure and size of porous SiO2 thin film produced by ...
专著信息 书名 Microstructure of carbon filled HDPE/EPDM composites studied by positron annihilation spectroscopy 语种 英文 撰写或编译 作者 H.M. Weng,S.J. Jia,B.J. Ye,X.F. Zhang,R.D. Han,H.Y. Wang,X.Y. Zhou,Z.C. Zhang,...
专著信息 书名 Vacancies in electron irradiated 6H silicon carbide studied by positron annihilation spectroscopy 语种 英文 撰写或编译 作者 C.H. Lam,C.C. Ling,H.M. Weng,Deng-sheng Hang,C.D. Beling,S. Fung, 第一作者单位 出版社 Ma...
专著信息 书名 Undoped Gallium Antimonide Studied by Positron Annihilation Spectroscopy 语种 英文 撰写或编译 作者 S.K. Ma,C.C. Ling,H.M. Weng,and D.S. Hang 第一作者单位 出版社 Mat. Res. Soc. Symp. Proc. 799, Z5.30.1 (2004) 出版地 ...
We report the measurement of Doppler broadening annihilation radiation in silicon, using 22Na as a positron source, and two Ge detectors arrangement. The two-dimensional coincidence energy spectrum wa...
Positron annihilation radiation profile in aluminum was observed with a pair of Ge detectors in coincidence. 22Na was used as a source of positron and the two-dimensional gamma energy spectrum was fit...
The propose of the present work is to study the interaction of positrons with quenched-in defects and clustered atoms to estimate formation enthalpy in series 50xx of commercial Al-Mg alloys, namely, ...
Positron behaviour at grain boundaries is characterized by their bulk diffusibility D, their bulk free lifetime tf and their trapped lifetime tt (tt > tf). Al-Mgx samples (x = 0-1.4 at %) have been ho...

中国研究生教育排行榜-

正在加载...

中国学术期刊排行榜-

正在加载...

世界大学科研机构排行榜-

正在加载...

中国大学排行榜-

正在加载...

人 物-

正在加载...

课 件-

正在加载...

视听资料-

正在加载...

研招资料 -

正在加载...

知识要闻-

正在加载...

国际动态-

正在加载...

会议中心-

正在加载...

学术指南-

正在加载...

学术站点-

正在加载...