Measurement of the proton light response of various LAB based scintillators and its implication for supernova neutrino detection via neutrino–proton scattering
Measurement of the proton light response of various LAB based scintillators and its implication for supernova neutrino detection via neutrino–proton scattering
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DOI：
10.1140/epjc/s10052-013-2390-1
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
B. Krosigk;L. Neumann;R. Nolte;S. Röttger;Kai Zuber
中科院分区：
文献类型：
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作者：
B. Krosigk;L. Neumann;R. Nolte;S. Röttger;Kai Zuber
首次测量了基于直链烷基苯的各种闪烁体(LAB)在1 MeV~17.15 MeV能量范围内的电子当量能质子光输出函数。测量是在Physikalisch-Technische Bundesanstalt(PTB)使用具有连续能量分布的中子束进行的。质子光输出数据是从闪烁体中的中子-质子散射产生的质子反冲谱中提取的。对于不同的实验室溶液，用Birks定律成功地描述了质子光输出的函数行为，其Birks常数B介于(0.0094±0.0002)cm MeV−1和(0.0098±0.0003)cm MeV−1之间。对于所有上限(95%CL)约为10−7 cm~2 MeV−~2的闪烁体，广义Birks定律中二次项的参数C与零一致。由此产生的猝灭因子对于未来计划中的基于中微子与质子弹性散射的超新星中微子探测特别重要。讨论了质子猝灭对中微子-质子散射超新星事件产额的影响。
The proton light output function in electron-equivalent energy of various scintillators based on linear alkylbenzene (LAB) has been measured in the energy range from 1 MeV to 17.15 MeV for the first time. The measurement was performed at the Physikalisch–Technische Bundesanstalt (PTB) using a neutron beam with continuous energy distribution. The proton light output data is extracted from proton recoil spectra originating from neutron–proton scattering in the scintillator. The functional behavior of the proton light output is described successfully by Birks’ law with a Birks constantkBbetween (0.0094±0.0002) cm MeV−1and (0.0098±0.0003) cm MeV−1for the different LAB solutions. The constantC, parameterizing the quadratic term in the generalized Birks law, is consistent with zero for all investigated scintillators with an upper limit (95 % CL) of about 10−7cm2MeV−2. The resulting quenching factors are especially important for future planned supernova neutrino detection based on the elastic scattering of neutrinos on protons. The impact of proton quenching on the supernova event yield from neutrino–proton scattering is discussed.