论文标题
lialo $ _ {2} $ Crystal的低温表征和与普通物质的旋转依赖性暗物质相互作用的新结果
Cryogenic characterization of a LiAlO$_{2}$ crystal and new results on spin-dependent dark matter interactions with ordinary matter
论文作者
论文摘要
在这项工作中，提出了闪烁的lialo $ _ {2} $单晶的第一个低温表征。结果表明，这种材料具有直接暗物质搜索实验的目标。已经测试了从Leibniz-InstitutFürKristallzüchtung（IKZ）生长的一个晶体获得的三个不同的检测器模块，已测试以研究低温温度下的不同特性。首先，使用了两个2.8 g双晶体来构建不同的检测器模块，这些模块在德国慕尼黑的Max Planck物理研究所（MPP）的地上实验室中运行。第一个检测器模块用于研究低温温度下lialo $ _ {2} $的闪烁特性。第二个实现了（213.02 $ \ pm $ 1.48）EV的能量阈值，该EV允许在350 MeV/c $^{2} $和1.50 Gev/c $^{2} $之间对旋转依赖性的暗物质粒子粒子散射横截面设置竞争限制。其次，一个具有373 g lialo $ _ {2} $晶体的探测器模块在实验室的一个地下设施中测试了主要吸收器（LNGS）：从该测量值中，可以通过此材料来确定使用该材料的可行性，从而确定该材料的可行性，从而可以使用该材料的可行性，以便使用该材料的可行性。
In this work, a first cryogenic characterization of a scintillating LiAlO$_{2}$ single crystal is presented. The results achieved show that this material holds great potential as a target for direct dark matter search experiments. Three different detector modules obtained from one crystal grown at the Leibniz-Institut für Kristallzüchtung (IKZ) have been tested to study different properties at cryogenic temperatures. Firstly, two 2.8 g twin crystals were used to build different detector modules which were operated in an above-ground laboratory at the Max Planck Institute for Physics (MPP) in Munich, Germany. The first detector module was used to study the scintillation properties of LiAlO$_{2}$ at cryogenic temperatures. The second achieved an energy threshold of (213.02$\pm$1.48) eV which allows setting a competitive limit on the spin-dependent dark matter particle-proton scattering cross section for dark matter particle masses between 350 MeV/c$^{2}$ and 1.50 GeV/c$^{2}$. Secondly, a detector module with a 373 g LiAlO$_{2}$ crystal as the main absorber was tested in an underground facility at the Laboratori Nazionali del Gran Sasso (LNGS): from this measurement it was possible to determine the radiopurity of the crystal and study the feasibility of using this material as a neutron flux monitor for low-background experiments.
