Simulation study of neutrino nucleus cross section measurement in a segmented detector at a spallation neutron source  

作　　者：杨振伟 丁明明 陈少敏 王喆 张锋 高原宁 

机构地区：[1]Key Laboratory of Particle&Radiation Imaging(Tsinghua University),Ministry of Education [2]Department of Engineering Physics,Tsinghua University [3]Center for High Energy Physics,Tsinghua University [4]Physics Department,Brookhaven National Laboratory

出　　处：《Chinese Physics C》2012年第6期538-543,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10875062,10905033)

摘　　要：Abstract： Knowledge of Ve-Fe/Pb differential cross sections for a^e energy below several tens of MeV scale is believed to be crucial in understanding supernova physics. In a segmented detector at a spallation neutron source, ve energy reconstructed from the electron range measurement is strongly affected because both multiple scattering and electromagnetic showers occur along the electron passage in target materials. In order to estimate these effects, a simulation study has been performed with a cube block model assuming perfect tracking precision. The energy spectrum distortion is observed to be proportional to the atomic number of the target material. Feasibility of unfolding the distorted ~ energy spectrum is studied for both Fe and Pb. An evaluation of the statistical accuracy attainable is therefore provided for a segmented detector.Abstract： Knowledge of Ve-Fe/Pb differential cross sections for a^e energy below several tens of MeV scale is believed to be crucial in understanding supernova physics. In a segmented detector at a spallation neutron source, ve energy reconstructed from the electron range measurement is strongly affected because both multiple scattering and electromagnetic showers occur along the electron passage in target materials. In order to estimate these effects, a simulation study has been performed with a cube block model assuming perfect tracking precision. The energy spectrum distortion is observed to be proportional to the atomic number of the target material. Feasibility of unfolding the distorted ~ energy spectrum is studied for both Fe and Pb. An evaluation of the statistical accuracy attainable is therefore provided for a segmented detector.

关 键 词：UNFOLDING NEUTRINO differential cross section segmented detector Monte Carlo SNS SUPERNOVA 

分 类 号：TL816.3[核科学技术—核技术及应用]