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(001)Tsai, Y. H.*; Kobata, Masaaki; Fukuda, Tatsuo; Tanida, Hajime; Kobayashi, Toru; Yamashita, Yoshiyuki*
Applied Physics Letters, 124(11), p.112105_1 - 112105_5, 2024/03
Times Cited Count：0 spectral bands for hydrocarbon-loss-events measured in JT-60U divertor plasmasNakano, Tomohide; Tsuzuki, Kazuhiro; Higashijima, Satoru; Kubo, Hirotaka; Asakura, Nobuyuki
Europhysics Conference Abstracts (CD-ROM), 29C, 4 Pages, 2005/00
Emission rates of CH and C
spectral bands for CH
, CD
_2
loss events due to dissociation, ionization and transport were measured in JT-60U divertor plasmas. The obtained data were used for estimating the chemical sputtering yields by a spectroscopic technique. The CH loss events over one CH photon emission was about 200 at electron temperatures between 30 eV and 70 eV. These values fell within the confidential band of the CD one. The CH
loss events over one CH and one C photon emission were, respectively, between 200 - 300 and between 600 - 1800, and their ratio between 3 - 6. On the assumption that only CH among hydrocarbons generated by chemical sputtering emits the C spectral bands, the intensity of the CH spectral bands originating from CH is inferred from the intensity of C spectral bands multiplied by the obtained ratio, resulting in higher than the measured CH intensity. This result indicates that dominant hydrocarbons generated by the chemical sputtering is not CH but CH.
Kameo, Yutaka; Nakashima, Mikio; Hirabayashi, Takakuni*
Journal of Nuclear Science and Technology, 41(9), p.919 - 924, 2004/09
Times Cited Count：13 Percentile：61.44(Nuclear Science & Technology)A new laser decontamination method utilizing a gel made from a sodium silicate solution and an acid was developed for removing radioactive nuclide incorporated into a surface oxide layer on metal waste. Decontamination tests were carried out using both simulated contaminated samples and pipe specimens cut from the primary coolant system of the Japan Power Demonstration Reactor. In the case of surface oxide layer consisting mainly of iron oxide, more than 99% of surface radioactivities were removed after two to three decontamination runs. In order to ascertain the role of laser irradiation on chemical reactions, chemical states of O and Fe in the oxide layer before and after decontamination were analyzed by X-ray photoelectron spectroscopy. It was found that the oxide layer was dissolved into the acid-containing gel, and the reaction was extensively promoted by the laser irradiation.
Sekiguchi, Tetsuhiro; Baba, Yuji
Atomic Collision Research in Japan, No.24, p.118 - 119, 1998/11
no abstracts in English
Uchiyama, Gunzo; Kihara, Takehiro; Hotoku, Shinobu; Fujine, Sachio; Maeda, Mitsuru
Radiochimica Acta, 81(1), p.29 - 32, 1998/00
no abstracts in English
March 31, 1995JAERI-Review 95-015, 67 Pages, 1995/10
JAERI-Review-95-015.pdf:2.01MB
no abstracts in English
JAERI-M 94-017, 58 Pages, 1994/03
no abstracts in English
Uchiyama, Gunzo; Fujine, Sachio; Hotoku, Shinobu; Maeda, Mitsuru
Proc. of the 3rd Int. Conf. on Nuclear Fuel Reprocessing and Waste Management,Vol. 2, p.723 - 728, 1991/00
no abstracts in English
JAERI-M 90-054, 57 Pages, 1990/03
no abstracts in English
Baba, Yuji
JAERI 1304, 76 Pages, 1987/02
no abstracts in English
Ono, Shinichi
Bulletin of the Chemical Society of Japan, 40(9), p.2035 - 2038, 1967/00
Times Cited Count：9no abstracts in English
