A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm

N. Naganawa, Tomoko Ariga, S. Awano, M. Hino, K. Hirota, H. Kawahara, M. Kitaguchi, K. Mishima, H. M. Shimizu, S. Tada, S. Tasaki, A. Umemoto

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick 10B 4C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.163 ± 0.015 (stat) ± 0.013 (sys))% and (10.3 ± 1.3 (stat) ± 1.1 (sys))% for cold and ultracold neutrons consistently with the 10B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11–99 nm in the angle region of tanθ≤ 1.9 , where θ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.

Original languageEnglish
Article number959
JournalEuropean Physical Journal C
Volume78
Issue number11
DOIs
Publication statusPublished - Nov 1 2018

Fingerprint

Neutron detectors
cold neutrons
nuclear emulsions
neutron counters
Emulsions
Neutrons
spatial resolution
neutrons
converters
Detectors
particle tracks
detectors
coatings
Coatings
Wavelength
wavelengths

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm. / Naganawa, N.; Ariga, Tomoko; Awano, S.; Hino, M.; Hirota, K.; Kawahara, H.; Kitaguchi, M.; Mishima, K.; Shimizu, H. M.; Tada, S.; Tasaki, S.; Umemoto, A.

In: European Physical Journal C, Vol. 78, No. 11, 959, 01.11.2018.

Research output: Contribution to journalArticle

Naganawa, N, Ariga, T, Awano, S, Hino, M, Hirota, K, Kawahara, H, Kitaguchi, M, Mishima, K, Shimizu, HM, Tada, S, Tasaki, S & Umemoto, A 2018, 'A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm', European Physical Journal C, vol. 78, no. 11, 959. https://doi.org/10.1140/epjc/s10052-018-6395-7
Naganawa, N. ; Ariga, Tomoko ; Awano, S. ; Hino, M. ; Hirota, K. ; Kawahara, H. ; Kitaguchi, M. ; Mishima, K. ; Shimizu, H. M. ; Tada, S. ; Tasaki, S. ; Umemoto, A. / A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm. In: European Physical Journal C. 2018 ; Vol. 78, No. 11.
@article{5d3604fa459544278a9bc22247762955,
title = "A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm",
abstract = "A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick 10B 4C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.163 ± 0.015 (stat) ± 0.013 (sys)){\%} and (10.3 ± 1.3 (stat) ± 1.1 (sys)){\%} for cold and ultracold neutrons consistently with the 10B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11–99 nm in the angle region of tanθ≤ 1.9 , where θ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.",
author = "N. Naganawa and Tomoko Ariga and S. Awano and M. Hino and K. Hirota and H. Kawahara and M. Kitaguchi and K. Mishima and Shimizu, {H. M.} and S. Tada and S. Tasaki and A. Umemoto",
year = "2018",
month = "11",
day = "1",
doi = "10.1140/epjc/s10052-018-6395-7",
language = "English",
volume = "78",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",
number = "11",

}

TY - JOUR

T1 - A cold/ultracold neutron detector using fine-grained nuclear emulsion with spatial resolution less than 100 nm

AU - Naganawa, N.

AU - Ariga, Tomoko

AU - Awano, S.

AU - Hino, M.

AU - Hirota, K.

AU - Kawahara, H.

AU - Kitaguchi, M.

AU - Mishima, K.

AU - Shimizu, H. M.

AU - Tada, S.

AU - Tasaki, S.

AU - Umemoto, A.

PY - 2018/11/1

Y1 - 2018/11/1

N2 - A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick 10B 4C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.163 ± 0.015 (stat) ± 0.013 (sys))% and (10.3 ± 1.3 (stat) ± 1.1 (sys))% for cold and ultracold neutrons consistently with the 10B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11–99 nm in the angle region of tanθ≤ 1.9 , where θ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.

AB - A new type of cold/ultracold neutron detector that can realize a spatial resolution of less than 100 nm was developed using nuclear emulsion. The detector consists of a fine-grained nuclear emulsion coating and a 50-nm thick 10B 4C layer for the neutron conversion. The detector was exposed to cold and ultracold neutrons (UCNs) at the J-PARC. Detection efficiencies were measured as (0.163 ± 0.015 (stat) ± 0.013 (sys))% and (10.3 ± 1.3 (stat) ± 1.1 (sys))% for cold and ultracold neutrons consistently with the 10B content in the converter. Positions of individual neutrons can be determined by observing secondary particle tracks recorded in the nuclear emulsion. The spatial resolution of incident neutrons were found to be in the range of 11–99 nm in the angle region of tanθ≤ 1.9 , where θ is the angle between a recorded track and the normal direction of the converter layer. The achieved spatial resolution corresponds to the improvement of one or two orders of magnitude compared with conventional techniques and it is comparable with the wavelength of UCNs.

UR - http://www.scopus.com/inward/record.url?scp=85057969776&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85057969776&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-018-6395-7

DO - 10.1140/epjc/s10052-018-6395-7

M3 - Article

VL - 78

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 11

M1 - 959

ER -