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Journal Articles

Remote detection of radioactive hotspot using a Compton camera mounted on a moving multi-copter drone above a contaminated area in Fukushima

Sato, Yuki; Ozawa, Shingo*; Terasaka, Yuta; Minemoto, Kojiro*; Tamura, Satoshi*; Shingu, Kazutoshi*; Nemoto, Makoto*; Torii, Tatsuo

Journal of Nuclear Science and Technology, 57(6), p.734 - 744, 2020/06

 Times Cited Count:1 Percentile:28.06(Nuclear Science & Technology)

JAEA Reports

Characteristics of 64 $$times$$ 64 channel high-position resolution neutron imaging detector

Sakasai, Kaoru; Katagiri, Masaki; Matsubayashi, Masahito; Rhodes, N.*; Schoonveld, E.*

JAERI-Research 2004-020, 19 Pages, 2004/12


no abstracts in English

Journal Articles

Introduction of imaging detection into a time-of-flight mass spectrometer to improve the dynamic range in the isotope ratio measurement

Katayama, Atsushi; Furukawa, Katsutoshi; Watanabe, Kazuo

Bunseki Kagaku, 52(6), p.461 - 467, 2003/06

 Times Cited Count:0 Percentile:100(Chemistry, Analytical)

An imaging ion detection system was introduced to a time-of-flight mass spectrometer (TOFMS) in order to increase dynamic range in the isotope ratio measurements. The new detection system utilizes a position sensitive micro channel plate (MCP) with a phosphor plate and a CCD camera which records light spots on the MCP. Mass discriminated ion beams produced by laser resonance ionization were swept on the surface of MCP by a time-depended electric field located in front of the MCP. The resulting light spots were recorded as images by CCD camera. A mass spectrum was obtained from the images. The present method was applied to the isotope analysis of calcium. A dynamic range of more than 5 orders of magnitude was achieved.

Journal Articles

A SrBPO$$_{5}$$:Eu$$^{2+}$$ storage phosphor for neutron imaging

Sakasai, Kaoru; Katagiri, Masaki; To, Kentaro; Takahashi, Hiroyuki*; Nakazawa, Masaharu*; Kondo, Yasuhiro*

Applied Physics A, 74(Suppl.1), p.S1589 - S1591, 2002/12

 Times Cited Count:27 Percentile:29.01(Materials Science, Multidisciplinary)

A phosphor material such as SrBPO$$_{5}$$:Eu$$^{2+}$$ has been investigated for two-dimensional imaging for pulsed-neutron source. The authors found this phosphor itself shows photostimulated luminescence (PSL) by illumination of 635 nm laser light after neutron irradiation without adding any neutron sensitive materials such as Gd. The PSL intensity per neutron flux was proportional to E$$^{-0.5}$$, where E is neutron energy. The neutron sensitivity was increased by using enriched boron instead of natural boron. The S$$_{gamma}$$/S$$_{n}$$ ratio of this phosphor using enriched boron was better than that of a commercially available imaging plate, where S$$_{gamma}$$ and S$$_{n}$$ are gamma and neutron sensitivities, respectively.

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