【摘要】 首先检查了北京谱仪（ＢＥＳ）桶部簇射计数器（ＢＳＣ）对γ光子电磁簇射形成的中性径迹的沉积能量和空间位置的测量值；然后，利用辐射Ｂｈａｂｈａ事例修正了ＢＳＣ的沉积能量及其误差δＥ；利用ｅ＋ｅ－→γγ（γ）过程确定了ＢＳＣ测量中性径迹的空间位置的误差，这些研究结果可以减小用运动学拟合方法分析包含中性径迹的物理事例的系统误差，提高ＢＥＳ的测量精度．更多还原

【Abstract】 The accuracy of neutral track measurement by Barrel Shower Counter (BSC)at BES is inveshgated. The photon energy in BSC is corrected using radiative Bhabhaevents and the error is determined. The error of photon position in BSC is alsodetermined using the e+ e- process. All these results can be applied to BESanalysis including neutral tracks, and the systematic error can be remarkably reducedwhen the kinematic fit is adopted.更多还原