搜索结果: 1-2 共查到“理学 electron-positron annihilation”相关记录2条 . 查询时间(0.066 秒)
Strong coupling，charm- and bottom-quark masses from electron-positron annihilation
strong coupling quark masses
font style='font-size:12px;'>
2010/5/7
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...
Study of the Electron-Positron Annihilation Coincidence Peak Two-Dimensional Profile
the Electron-Positron Annihilation Coincidence Peak Two-Dimensional Profile aluminum Ge detectors
font style='font-size:12px;'>
2010/10/26
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...