Neutron imaging is a non-destructive inspection technique with a wide range of applications. One of the important aspects concerning neutron imaging is achieving micrometer-scale spatial resolution. Developing a neutron detector with a high resolution is a challenging task. Neutron detectors, based on fine-grained nuclear emulsion, may be suitable for high resolution neutron imaging applications. High track density is a necessary requirement to improve the quality of neutron imaging. However, the available track analysis methods are difficult to apply under high track density conditions. Simulated images were used to determine the required track density for neutron imaging. It was concluded that a track density of the order of 104 tracks per 100 × 100 μm2 is sufficient to utilize neutron detectors for imaging applications. The contrast resolution was also investigated for the image data sets with various track densities and neutron transmission rates. Moreover, experiments were performed for neutron imaging of the gadolinium-based gratings with known geometries. The structure of gratings was successfully resolved. The calculated 1σ 10-90 \% edge response, using the gray scale optical images of the grating slit with a periodic structure of 9 μm, was 0.945 ± 0.004 μm.
@article{arxiv.2210.17026,
title = {Investigation of the neutron imaging applications using fine-grained nuclear emulsion},
author = {Abdul Muneem and Junya Yoshida and Hiroyuki Ekawa and Masahiro Hino and Katsuya Hirota and Go Ichikawa and Ayumi Kasagi and Masaaki Kitaguchi and Naoto Muto and Kenji Mishima and Jameel-Un Nabi and Manami Nakagawa and Naotaka Naganawa and Takehiko R. Saito},
journal= {arXiv preprint arXiv:2210.17026},
year = {2023}
}