北京谱仪桶部簇射计数器能量响应特性研究

Study of Energy Response Nonlinearity of BSC at BES

在北京正负电子对撞机的Ｊ／ψ和Ｄｓ能区，选择了辐射巴巴事例，并以此来研究北京谱仪的桶部簇射计数器能量响应特性．在消除了由于电子和辐射光子在桶部簇射计数器中沉积能量区域重叠的影响后，正确地得到了桶部簇射计数器在电子和光子动量小于２ＧｅＶ以下的能量响应，表明在所研究能区，桶部簇射计数器的能量响应线性很好．对桶部簇射计数器微小的非线性进行修正后，重建的π０不变质量谱得到改善．

The energy response characteristics of the barrel shower counter (BSC) of BES in energy region of J/ψ and Ds has been analysed,and a good energy linearity of BSC successfully obtained after eliminating the overlapping effect of the deposited energies in BSC of electrons and radiative photons.This demonstrates that the energy linearity of BSC is credible.