论文标题
宇宙射线钻孔的能量差分光谱的测量低于400 MEV
Measurement of energy differential spectrum of cosmic-ray muons below 400 MeV
论文作者
论文摘要
宇宙射线μ子的最新应用需要在低能量时准确地对其通量进行准确的建模。但是，尚未报告低于400 MEV的测量。因此，我们开发了全面吸收的mUON能能光谱仪，以在400 meV以下获得能量差分通量。由于我们的主要检测器可以测量低于75 MEV的兆能量，因此采用了一种能量降解方法（使用5厘米和20厘米厚的铅块）来移动敏感的能量范围。进行了三个测量（在正常模式下和两个能量降解模式下）分别进行10天和11天。将测量结果与分析宇宙射线模型，帕尔马（大气中的粒子和重离子传输代码系统的分析辐射模型）进行了比较，我们发现该模型可以精确预测通量的较低能量部分。
Recent applications of cosmic-ray muons require accurate modeling of their flux at low-energy. However, no measurement has been reported below 400 MeV. Therefore, we developed a full-absorption muon energy spectrometer to obtain energy differential flux below 400 MeV. Because our main detector can measure muon energies below 75 MeV, an energy degradation method is adopted (using 5- and 20-cm thick lead blocks) to shift the sensitive energy range. Three measurements were performed (in the normal mode and the two energy degrading modes) for 10 and 11 days each. The measurement results were compared with an analytical cosmic-ray model, PARMA (the particle and heavy ion transport code system-based analytical radiation model in the atmosphere) and we found that the model can precisely predict the lower energy part of the flux.
