论文标题
Znwo $ _4 $各向异性响应Adamo Project对核后坐力的响应的测量值
Measurements of ZnWO$_4$ anisotropic response to nuclear recoils for the ADAMO project
论文作者
论文摘要
各向异性闪烁体可以提供独特的可能性来利用所谓的方向性方法，以研究诱导核后坐力的这些暗物质（DM）候选者的存在。实际上，它们的使用可能会克服难以检测极短的核后坐力轨迹。在本文中，我们介绍了Znwo $ _4 $ crystal闪烁体对核后坐力的各向异性响应的最新测量值，这是在Adamo Project的框架内进行的。 Znwo $ _4 $ Crystal闪烁体的各向异性特征最初是用$α$颗粒测量的；这些结果也通过此处提供的其他测量结果证实。通过在ENEA-CASACCIA和中子探测器上使用中子发生器和中子检测器来标记散射的中子，从而获得了实验性的核后坐力数据。特别是，已经确定了三个不同的中子散射角度（即核后坐力能量）的核后坐力的猝灭因子值。从这些测量值中，在5.4标准偏差下确定了Znwo $ _4 $ crystal闪烁体中核后坐力的光反应的各向异性。
Anisotropic scintillators can offer a unique possibility to exploit the so-called directionality approach in order to investigate the presence of those Dark Matter (DM) candidates inducing nuclear recoils. In fact, their use can overcome the difficulty of detecting extremely short nuclear recoil traces. In this paper we present recent measurements performed on the anisotropic response of a ZnWO$_4$ crystal scintillator to nuclear recoils, in the framework of the ADAMO project. The anisotropic features of the ZnWO$_4$ crystal scintillators were initially measured with $α$ particles; those results have been also confirmed by the additional measurements presented here. The experimental nuclear recoil data were obtained by using a neutron generator at ENEA-CASACCIA and neutron detectors to tag the scattered neutrons; in particular, the quenching factor values for nuclear recoils along different crystallographic axes have been determined for three different neutron scattering angles (i.e. nuclear recoils energies). From these measurements, the anisotropy of the light response for nuclear recoils in the ZnWO$_4$ crystal scintillator has been determined at 5.4 standard deviations.
