For the polarization of neutrons with an energy level of \textcolor{black}{$>0.1$ eV}, we developed a novel polarized proton spin filter based on dynamic nuclear polarization using photo-excited triplet electron spins. The spin filter consists of a single crystal of naphthalene doped with deuterated pentacene and has a size of $\phi15\times4$ ${\rm mm}^3$, allowing it to cover a wide beam diameter. It was operated in 0.35 T and at 90 K. We succeeded in polarizing neutrons in the energy range $0.1-10$ eV using a RIKEN accelerator-driven compact neutron source. The averaged values of the proton and neutron polarization were $0.250\pm0.050$ and $0.076\pm0.015$, respectively.

中文翻译：

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基于动态核极化的超热中子极化质子自旋滤波器使用光激发三线态电子自旋

对于具有 \textcolor{black}{$>0.1$ eV} 能级的中子极化，我们开发了一种基于动态核极化的新型极化质子自旋滤波器，使用光激发三重电子自旋。自旋滤光片由掺杂有氘化并五苯的萘单晶组成，尺寸为 $\phi15\times4$ ${\rm mm}^3$，使其能够覆盖较宽的光束直径。它在 0.35 T 和 90 K 下运行。我们使用 RIKEN 加速器驱动的紧凑型中子源成功地极化了能量范围为 $0.1-10 $ eV 的中子。质子和中子极化的平均值分别为 $0.250\pm0.050$ 和 $0.076\pm0.015$。