Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Atsuki Terakawa"'
Autor:
Keitaro Hitomi, Mitsuhiro Nogami, Toshiyuki Onodera, Kenichi Watanabe, Keizo Ishii, Atsuki Terakawa, Kio Matsumoto
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 477:43-45
Semiconductor detectors for PIXE applications were fabricated using TlBr crystals. The TlBr detectors had a multiple-electrode detector design to minimize the pulse-height loss due to hole trapping. Electrodes containing thallium metal were employed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::537b5a80ff70a2dac180e809157afa96
https://doi.org/10.1016/j.nimb.2019.10.003
https://doi.org/10.1016/j.nimb.2019.10.003
Development of a 20MeV proton particle-induced X-ray emission analysis method in a helium atmosphere
Publikováno v:
International Journal of PIXE. 29:113-117
We developed a 20[Formula: see text]MeV particle-induced X-ray emission (PIXE) analysis method using a medical cyclotron, which is conventionally used for positron emission tomography analysis performed in vacuo, during which the target sample is dam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3569350ba29c74f26a44147de41300aa
https://doi.org/10.1142/s0129083519500219
https://doi.org/10.1142/s0129083519500219
Publikováno v:
International Journal of PIXE. 29:53-59
For the first time, particle-induced X-ray emission (PIXE) spectra were obtained using TlBr detectors. The TlBr detector was fabricated from a crystal grown with material purified by the zone purification. Its active volume was 1.5 mm × 1.5 mm × 3.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b226adf3cc85d0fee3b3f6b433ccb06a
https://doi.org/10.1142/s0129083519500153
https://doi.org/10.1142/s0129083519500153
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 902:211-218
Positron emission tomography (PET) is used to research high order functions in the brain. There is a lot of brain activity in the gray matter. To study the function of the corpus callosum in gray matter, a spatial resolution of approximately 1 mm is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::803b5a6ff985c324785f9f49569c9715
https://doi.org/10.1016/j.nima.2018.03.027
https://doi.org/10.1016/j.nima.2018.03.027
Autor:
Keizo Ishii, Mitsuhiro Nogami, Nobumichi Nagano, Keitaro Hitomi, Atsuki Terakawa, Hiroki Ushijima
Publikováno v:
International Journal of PIXE. 28:93-100
We explored whether medical positron emission tomography (PET) cyclotron proton beams could be used for proton-induced X-ray emission (PIXE) analysis. The beam current of the medical PET cyclotron is high, as required for radioisotope production, and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::647458904adba260305b1e125b9d3132
https://doi.org/10.1142/s0129083518500183
https://doi.org/10.1142/s0129083518500183
Publikováno v:
International Journal of PIXE. 28:101-106
We performed a particle-induced X-ray emission (PIXE) analysis of tea leaf samples (Camellia sinensis (L.) Kuntze) to evaluate the possibility of internal radiation exposure due to the intake of green tea contaminated with [Formula: see text]Cs and [
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b0549a7e1e6d3daab4a4bb79769942b
https://doi.org/10.1142/s0129083518500195
https://doi.org/10.1142/s0129083518500195
Autor:
Daichi Sata, Seong Yun Kim, Hirotsugu Arai, Taisuke Hatakeyama, Tohru Ohnuma, T. Yamaguchi, Keizo Ishii, Shigeo Matsuyama, H. Arai, Atsuki Terakawa, Shin Itoh
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 371:387-391
We used X-ray computed tomography (CT) using characteristic X-rays produced in micro-particle-induced X-ray emission (PIXE) to investigate the internal structure of silt particles and develop new methods to decontaminate soil containing radioactive c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::278d66a5d19cc2483c2e296291fe5d88
https://doi.org/10.1016/j.nimb.2015.09.054
https://doi.org/10.1016/j.nimb.2015.09.054
Autor:
T. Maruyama, H. Arai, M. Fujiwara, Keizo Ishii, Y. Saneshige, Atsuki Terakawa, Shigeo Matsuyama
Publikováno v:
International Journal of PIXE. 26:7-13
We succeeded in observation of ferrokinetics in a plant (20 days radish) using the micron RI imaging which was previously developed in our laboratory, by improving two criteria: (i) adjustment of the iron solution for the plant’s intake; and (ii) m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ea6c4b4a8685cae1ddcf0ea02f2daa5
https://doi.org/10.1142/s0129083516500029
https://doi.org/10.1142/s0129083516500029
Elemental analysis on the particle cross-section of the radioactive cesium contaminated soil by PIXE
Autor:
Soudai Takyuu, Keizo Ishii, Kouta Imaizumi, Shigeo Matsuyama, Taisuke Hatakeyama, H. Arai, Hirotsugu Arai, Tohru Ohnuma, Daichi Sata, Atsuki Terakawa, Daiki Seki, Syuuhei Suzuki, Toshirou Yamaguchi
Publikováno v:
International Journal of PIXE. 26:1-6
The amount of contaminated soil with radioactive cesium (Cs) is more than 22 million cubic meters as a result of the Fukushima Daiichi nuclear power plant accident. In order to save the cost for keeping the soil covered, it is necessary to reduce its
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5339c693f4f131a60ed291632349b42c
https://doi.org/10.1142/s0129083516500017
https://doi.org/10.1142/s0129083516500017
Autor:
Fumito Fujishiro, Shigeo Matsuyama, J. Arikawa, Yukihiro Takahashi, W. Yamashita, T. Togashi, Hiromichi Yamazaki, Keizo Ishii, Atsuki Terakawa, Yasuhiro Sakemi, Yohei Kikuchi
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 365:606-610
A micro-pattern gaseous detector based on gas electron multiplier technology (GEM detector) was developed as a new transmission beam monitor for charged-particle therapy to obtain real-time information about the parameters of a therapeutic beam. Feas
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3ea8677c4ba98ab4405ad10a51b6d05
https://doi.org/10.1016/j.nimb.2015.09.023
https://doi.org/10.1016/j.nimb.2015.09.023