A Neutron Detector with Submicron Spatial Resolution using Fine-grained Nuclear Emulsion

Naganawa, N.; Awano, S.; Hino, Masahiro; Hirose, Masahiro; Hirota, Katsuya; Kawahara, H.; Kitaguchi, Masaaki; Mishima, Kenji; Nagae, T.; Shimizu, Hirohiko M.; Tasaki, Seiji; Umemoto, A.

doi:10.1016/j.phpro.2017.06.031

Cited by 6 publications

(4 citation statements)

References 13 publications

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“…It employs fine-grained emulsion detectors with 35-nm-diameter crystals and nuclides with large neutron absorption cross sections, such as 6 Li and 10 B. One detector type is realised by doping LiNO 3 into fine-grained emulsion detectors [147]. The cross-sectional view of the detector is shown in Fig.…”

Section: Development Of Cold-neutron Detectormentioning

confidence: 99%

Nuclear Emulsions

Ariga¹,

Ariga²,

Lellis³

et al. 2020

Particle Physics Reference Library

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Section: Development Of Cold-neutron Detectormentioning

confidence: 99%

Nuclear Emulsions

Ariga¹,

Ariga²,

Lellis³

et al. 2020

Particle Physics Reference Library

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“…The resolution of the track identification is inversely proportional to the density of grains in the tracks, which is typically ~1.4 grain/µm for fine-grained nuclear emulsion. Thus, we expect to achieve sub-micrometer spatial resolution [22].…”

Section: Development Of a Sub-micrometer Position Sensitive Neutron Dmentioning

confidence: 99%

Fundamental Physics Activities with Pulsed Neutron at J-PARC(BL05)

Mishima

Awano²,

Fuwa

et al. 2018

Proceedings of the International Conference on Neutron Optics (NOP2017)

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Neutron Optics and Physics (NOP/ BL05)" at MLF in J-PARC is a beamline for studies of fundamental physics. The beamline is divided into three branches so that different experiments can be performed in parallel. These beam branches are being used to develop a variety of new projects. We are developing an experimental project to measure the neutron lifetime with total uncertainty of 1 s (0.1%). The neutron lifetime is an important parameter in elementary particle and astrophysics. Thus far, the neutron lifetime has been measured by several groups; however, different values are obtained from different measurement methods. This experiment is using a method with different sources of systematic uncertainty than measurements conducted to date. We are also developing a source of pulsed ultra-cold neutrons (UCNs) produced from a Doppler shifter are available at the unpolarized beam branch. We are developing a time focusing device for UCNs, a so called "rebuncher", which can increase UCN density from a pulsed UCN source. At the low divergence beam branch, an experiment to search an unknown intermediate force with nanometer range is performed by measuring the angular dependence of neutron scattering by noble gases. Finally the beamline is also used for the research and development of optical elements and detectors. For example, a position sensitive neutron detector that uses emulsion to achieve submicrometer resolution is currently under development. We have succeeded in detecting cold and ultra-cold neutrons using the emulsion detector.

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“…The sensitivity of these emulsions is adjusted such that they are not sensitive to minimum ionizing particles and gamma rays. We have studied the use of these emulsions as neutron detectors for fundamental physics experiments [ 10 , 11 ]. We used boron as a neutron converter and irradiated it with cold and ultra- cold neutrons, achieving a spatial resolution of up to 11 nm.…”

Section: Introductionmentioning

confidence: 99%

Neutron Imaging Using a Fine-Grained Nuclear Emulsion

et al. 2021

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A neutron detector using a fine-grained nuclear emulsion has a sub-micron spatial resolution and thus has potential to be applied as high-resolution neutron imaging. In this paper, we present two approaches to applying the emulsion detectors for neutron imaging. One is using a track analysis to derive the reaction points for high resolution. From an image obtained with a 9 μm pitch Gd grating with cold neutrons, periodic peak with a standard deviation of 1.3 μm was observed. The other is an approach without a track analysis for high-density irradiation. An internal structure of a crystal oscillator chip, with a scale of approximately 30 μm, was able to be observed after an image analysis.

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A Neutron Detector with Submicron Spatial Resolution using Fine-grained Nuclear Emulsion

Cited by 6 publications

References 13 publications

Nuclear Emulsions

Nuclear Emulsions

Fundamental Physics Activities with Pulsed Neutron at J-PARC(BL05)

Neutron Imaging Using a Fine-Grained Nuclear Emulsion

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