Light output response of KamLAND liquid scintillator for protons and 12C nuclei
Light output response of KamLAND liquid scintillator for protons and 12C nuclei
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DOI：
10.1016/j.nima.2010.07.087
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发表时间：
2010-10
影响因子：
1.4
通讯作者：
S. Yoshida;T. Ebihara;T. Yano;A. Kozlov;T. Kishimoto;I. Ogawa;R. Hazama;S. Umehara;K. Mukaida;K. Ichihara;Y. Hirano;I. Murata;Jun Datemichi;H. Sugimoto
中科院分区：
文献类型：
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作者：
S. Yoshida;T. Ebihara;T. Yano;A. Kozlov;T. Kishimoto;I. Ogawa;R. Hazama;S. Umehara;K. Mukaida;K. Ichihara;Y. Hirano;I. Murata;Jun Datemichi;H. Sugimoto
利用单色中子束精确测量了KamLAND液体闪烁体中质子和碳核的光输出响应。在反冲能量为424 keV ~ 10.5MeV范围内，用Birks公式进行高阶修正，可以很好地描述质子反冲响应。通过对Birks公式的修正，用核能损失项描述了碳反冲的响应，测量的反冲能量从171 keV到2.2MeV。利用得到的光输出响应估算了KamLAND中C13（α，n）O 16反应的背景能谱。在预期的背景光谱中的能量尺度的系统不确定性进一步改善与测量的光输出响应。
The light output responses for protons and carbon nuclei in the KamLAND liquid scintillator were precisely measured using a monochromatic neutron beam. The observed response for proton recoils is well described by Birks formula with the higher-order correction, for the recoil energy from 424keV to 10.5MeV. The response for carbon recoils is also well described by modifying the Birks formula with the nuclear energy loss terms, for the measured recoil energy from 171keV to 2.2MeV. The obtained light output responses were used to estimate the background energy spectrum of the C13(α,n)O16 reaction in the KamLAND. The systematic uncertainty of the energy scale in the expected background spectrum was further improved with the measured light output responses.