The reference pattern and the CCD are exposed to cold neutrons (CNs) at the MINE2 beam line of the research reactor JRR-3. The monochromatic neutron beam has a wavelength of 0.88 nm and a bandwidth of 2.7% in full width at half maximum. CNs are suitable for evaluating the spatial resolution $^{because their beam divergence is as small as 1}$× 10 $_{−}$3 radian. We have reported that a CCD sensor covered with a $^{6}$Li converter can determine a neutron incident position with a precision of 5 . 3 µ m [4]. The spatial resolution of a CCD with a $^{10}$B converter is compared to that of a $^{6}$Li converter using the same reference pattern as used in our previous report. The reference pattern is made of a gadolinium foil with a thickness of 25 µ m. This thickness is sufficient to fully absorb CNs. The 144 fine spoke slits shown in Fig. 4(a) are formed by an excimer laser by Laserx Co. Ltd. Each spoke slit has four trapezoidal holes along the radius, as shown in Fig. 4(b) [4]. The spatial resolution depends on the range and deposit energy of the charged particle created by nuclear reaction in the converter. To investigate differences in the spatial resolution of charged particles, the energy range is selected to identify different charged particles (see Table 2). Fig. 5 shows the hit position distributions calculated from the barycen- ter of each cluster. All the events are plotted in an area one-twelfth of the total area, assuming rotational symmetry of the event distribution. For the stopped tritons from the $^{6}$Li converter, the innermost slit cannot be distin- guished. This is because the stopped tritons span a long range inside the CCD, as mentioned above. On the other hand, a clear pattern can be seen 10 4.2.1. Comparison between $^{10}$B and $^{6}$Li converters