The continuum one-photon annihilation at ψ(2S) in e+e- experiment is studied.
研究了e+e-实验中 ψ( 2S)能区连续态单光子湮没过程的截面对观测总截面的贡献 。
Study on the toughening of epoxy resin by positron annihilation spectroscopy for chemical analysis;
用正电子湮没光谱研究环氧树脂的增韧
