Measurements of $$\hbox {ZnWO}_4$$ anisotropic response to nuclear recoils for the ADAMO project
Measurements of $$\hbox {ZnWO}_4$$ anisotropic response to nuclear recoils for the ADAMO project
复制标题
ADAMO 项目的 $$hbox {ZnWO}_4$$ 核反冲各向异性响应的测量
DOI：
10.1140/epja/s10050-020-00094-z
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
V. Tretyak
中科院分区：
文献类型：
--
作者：
P. Belli;R. Bernabei;F. Cappella;V. Caracciolo;R. Cerulli;N. Cherubini;F. Danevich;A. Incicchitti;D. Kasperovych;V. Merlo;E. Piccinelli;O. Polischuk;V. Tretyak
各向异性闪烁体可以提供一种独特的可能性来利用所谓的方向性方法来调查那些诱发核反冲的暗物质(DM)候选者的存在。事实上，使用它们可以克服探测极短的核反冲痕迹的困难。本文介绍了在Adamo计划框架内对非晶闪烁体对核反冲各向异性响应的最新测量结果。晶体闪烁体的各向异性特征最初是用粒子测量的，这些结果也得到了这里提供的附加测量的证实。利用ENEA-Casaccia的中子发生器和中子探测器标记散射的中子，获得了实验的核反冲数据，特别是确定了三种不同的中子散射角(即核反冲能量)沿不同晶轴的核反冲猝灭因子值。根据这些测量，确定了晶体闪烁体中核反冲的光响应的各向异性为5.4标准差。
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 acrystal scintillator to nuclear recoils, in the framework of the ADAMO project. The anisotropic features of thecrystal scintillators were initially measured withparticles; 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 thecrystal scintillator has been determined at 5.4 standard deviations.