论文标题
低动量大气在地面上的角度分布
Angular distribution of low momentum atmospheric muons at ground level
论文作者
论文摘要
我们报告了在海拔38 m以上的低动量大气压在南北方向的-60至60度之间的低位大气雄性的角度分布的测量值。使用两个NAI（TL）闪烁探测器进行巧合进行了MUON检测。可调节的铅厚度放置在探测器之间，允许选择最小动量范围为0.3至0.9 GEV $/$ c的MUON。通过分析通过实验设置的GEANT4模拟支持的闪烁体中的沉积能光谱来确定综合和差异通量。结果与$ \ cos^{n}（θ）$分布一致，与文献一致。这些数据有助于填补地磁截止刚度间隔8〜GV $ <p_c <$ 14〜GV的空白，在此之前未进行类似的测量。我们发现，在此MONMOMMA截止的此域中，$ n = 1.88-0.12〜p_μ^c $ $p_μ^c $ <1 gev $/$ c。目前的测量对于需要准确的综合通量的许多MUON研究很有用。
We report measurements of the angular distributions of low momentum atmospheric muons at 38 m above sea level for zenith angles $θ$ between -60 and 60 degrees in the south-north direction. The muon detection was performed with two NaI(Tl) scintillation detectors mounted in coincidence. An adjustable lead thickness placed between the detectors allowed to select muons with a minimal momentum ranging from 0.3 to 0.9 GeV$/$c. The integrated and the differential muon flux were determined by analyzing the deposited energy spectra in the scintillators backed up by a Geant4 simulation of the experimental setup. The results are consistent with the $\cos^{n}(θ)$ distribution in good agreement with the literature. These data contribute to fill the gap in the geomagnetic cutoff rigidity interval 8~GV$<P_c<$14~GV where no similar measurements were performed before. We found that $n=1.88-0.12~P_μ^c$ in this domain of muon momenta cutoff $P_μ^c$<1 GeV$/$c. The present measurements are useful for many muon studies requiring an accurate integrated flux.
