Search Results - "Magara, Masaaki"

Identifying Uranium Particles Using Fission Tracks and Microsampling Individual Particles for Analysis Using Thermal Ionization Mass Spectrometry by Esaka, Fumitaka, Suzuki, Daisuke, Magara, Masaaki

“…The analysis of isotope ratios in individual particles found in the environment is important to clarify the origins of the particles. In particular, the…”
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Size distribution of radioactive particles collected at Tokai, Japan 6 days after the nuclear accident by Miyamoto, Yutaka, Yasuda, Kenichiro, Magara, Masaaki

“…Airborne radioactive particles released by the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident in 2011 were collected with a cascade low-pressure…”
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Accurate purification age determination of individual uranium–plutonium mixed particles by Miyamoto, Yutaka, Suzuki, Daisuke, Esaka, Fumitaka, Magara, Masaaki

“…Age of individual uranium–plutonium (U/Pu) mixed particles with various U/Pu atomic ratios (1–70) were determined by inductively coupled plasma mass…”
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Analysis of plutonium isotope ratios including 238 Pu/ 239 Pu in individual U-Pu mixed oxide particles by means of a combination of alpha spectrometry and ICP-MS by Esaka, Fumitaka, Yasuda, Kenichiro, Suzuki, Daisuke, Miyamoto, Yutaka, Magara, Masaaki

“…Isotope ratio analysis of individual uranium-plutonium (U-Pu) mixed oxide particles contained within environmental samples taken from nuclear facilities is…”
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Fission track–secondary ion mass spectrometry as a tool for detecting the isotopic signature of individual uranium containing particles by Esaka, Fumitaka, Lee, Chi-Gyu, Magara, Masaaki, Kimura, Takaumi

“…[Display omitted] ► A fission track technique is combined with secondary ion mass spectrometry. ► Plasma ashing is used to prepare samples for analysis. ► The…”
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Uranium Particle Identification with SEM-EDX for Isotopic Analysis by Secondary Ion Mass Spectrometry by Fumitaka Esaka, Masaaki Magara

“…Secondary ion mass spectrometry (SIMS) is a promising tool to measure isotope ratios of individual uranium particles in environmental samples for nuclear…”
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Preparation of Microvolume Anion-Exchange Cartridge for Inductively Coupled Plasma Mass Spectrometry-Based Determination of 237Np Content in Spent Nuclear Fuel by Asai, Shiho, Hanzawa, Yukiko, Konda, Miki, Suzuki, Daisuke, Magara, Masaaki, Kimura, Takaumi, Ishihara, Ryo, Saito, Kyoichi, Yamada, Shinsuke, Hirota, Hideyuki

“…Microvolume anion-exchange porous polymer disk-packed cartridges were prepared for Am/Np separation, which is required prior to the measurement of…”
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Rapid collection of iron hydroxide for determination of Th isotopes in seawater by Okubo, Ayako, Obata, Hajime, Magara, Masaaki, Kimura, Takaumi, Ogawa, Hiroshi

“…•DIAION CR-20 chelating resin has successfully collected iron-hydroxide with Th isotopes.•Ferric ions in the iron hydroxide were bonded to functional groups of…”
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Plutonium age determination from 240Pu/236U ratios in individual particles by ICP-MS without prior chemical separation by Esaka, Fumitaka, Suzuki, Daisuke, Miyamoto, Yutaka, Magara, Masaaki

“…The determination of the time (i.e., age) elapsed since the last purification of plutonium with chemical separation gives important information for monitoring…”
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A new method for isotope ratio measurement of uranium in trace amount by thermal ionization mass spectrometry: The continuous heating method by Suzuki, Daisuke, Saito-Kokubu, Yoko, Sakurai, Satoshi, Lee, Chi-Gyu, Magara, Masaaki, Iguchi, Kazunari, Kimura, Takaumi

“…A new method for isotope ratio measurement with thermal ionization mass spectrometry (TIMS), “continuous heating method”, was developed in order to determine…”
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Combined application of alpha-track and fission-track techniques for detection of plutonium particles in environmental samples prior to isotopic measurement using thermo-ionization mass spectrometry by Lee, Chi-Gyu, Suzuki, Daisuke, Esaka, Fumitaka, Magara, Masaaki, Kimura, Takaumi

“…The fission track technique is a sensitive detection method for particles which contain radio-nuclides like 235U or 239Pu. However, when the sample is a…”
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Application of a continuous heating method using thermal ionization mass spectrometry to measure isotope ratios of plutonium and uranium in trace amounts of uranium–plutonium mixture sample by Saito-Kokubu, Yoko, Suzuki, Daisuke, Lee, Chi-Gyu, Inagawa, Jun, Magara, Masaaki, Kimura, Takaumi

“…[Display omitted] ► The continuous heating method by TIMS was confirmed as an effective method for measuring simultaneously isotope ratios of Pu and U in Pu/U…”
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Uranium Particle Identification with SEM-EDX for Isotopic Analysis by Secondary Ion Mass Spectrometry by Esaka, Fumitaka, Magara, Masaaki

“…Secondary ion mass spectrometry (SIMS) is a promising tool to measure isotope ratios of individual uranium particles in environmental samples for nuclear…”
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Application of Inductively Coupled Plasma Mass Spectrometry to the determination of uranium isotope ratios in individual particles for nuclear safeguards by Zhang, Xiao Zhi, Esaka, Fumitaka, Esaka, Konomi T., Magara, Masaaki, Sakurai, Satoshi, Usuda, Shigekazu, Watanabe, Kazuo

“…The capability of inductively coupled plasma mass spectrometry (ICP-MS) for the determination of uranium isotope ratios in individual particles was determined…”
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Efficient Isotope Ratio Analysis of Uranium Particles in Swipe Samples by Total-Reflection X-ray Fluorescence Spectrometry and Secondary Ion Mass Spectrometry by ESAKA, Fumitaka, WATANABE, Kazuo, FUKUYAMA, Hiroyasu, ONODERA, Takashi, ESAKA, Konomi T., MAGARA, Masaaki, SAKURAI, Satoshi, USUDA, Shigekazu

“…A new particle recovery method and a sensitive screening method were developed for subsequent isotope ratio analysis of uranium particles in safeguards swipe…”
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Mass-dependent isotopic fractionation of a solid tin under a strong gravitational field by Osawa, Takahito, Ono, Masao, Esaka, Fumitaka, Okayasu, Satoru, Iguchi, Yusuke, Hao, Ting, Magara, Masaaki, Mashimo, Tsutomu

“…Pure tin metals were centrifuged at 1$\times$106g and at 220 °C for 100 hours, at 0.40$\times$106g at 220–230 °C for 24 hours, and at 0.25$\times$106g at 220…”
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Feasibility Study of Isotope Ratio Analysis of Individual Uranium-Plutonium Mixed Oxide Particles with SIMS and ICP-MS by Fumitaka Esaka, Masaaki Magara, Daisuke Suzuki, Yutaka Miyamoto, Chi-gyu Lee, Takaumi Kimura

“…Isotope ratio analysis of nuclear materials in individual particles is of great importance for nuclear safeguards. Although secondary ion mass spectrometry…”
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Secondary ion mass spectrometry combined with alpha track detection for isotope abundance ratio analysis of individual uranium-bearing particles by Esaka, Fumitaka, Magara, Masaaki

“…Secondary ion mass spectrometry (SIMS) was used in combination with alpha track detection for the efficient analysis of uranium-bearing particles with higher…”
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Improved Method of Fission Track Sample Preparation for Detecting Particles Containing Fissile Materials in Safeguards Environmental Samples by Lee, Chi-Gyu, Iguchi, Kazunari, Esaka, Fumitaka, Magara, Masaaki, Sakurai, Satoshi, Watanabe, Kazuo, Usuda, Shigekazu

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A Screening Method for Uranium Particles in Safeguards Environmental Samples Based on Etching Behavior of Fission Tracks by Lee, Chi-Gyu, Iguchi, Kazunari, Esaka, Fumitaka, Magara, Masaaki, Sakurai, Satoshi, Usuda, Shigekazu

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