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Your search keyword '"Yasuda, K."' showing total 272 results
Start Over Author "Yasuda, K." Publication Type Conference Materials
272 results on '"Yasuda, K."'

1. PICOLON dark matter search project

Author

Fushimi, Ken-Ichi, primary, Fushimi", "K., additional, Chernyak", "D., additional, Ejiri", "H., additional, Hata", "K., additional, Hazama", "R., additional, Iida", "T., additional, Ikeda", "H., additional, Imagawa", "K., additional, Inoue", "K., additional, Ito", "H., additional, Kisimoto", "T., additional, Koga", "M., additional, Kotera", "K., additional, Kozlov", "A., additional, Nakamura", "K., additional, Orito", "R., additional, Shima", "T., additional, Takemoto", "Y., additional, Umehara", "S., additional, Urano", "Y., additional, Yamamoto", "Y., additional, Yasuda", "K., additional, and Yoshida", "S., additional

Published
2023
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2. Purification of CaF2 crystal for double beta decay experiments.

Author

Fushimi, K., Imagawa, K., Kishida, Y., Kurosawa, S., Orito, R., Sakaue, A., Takihira, Y., Umehara, S., Yamaji, A., Yamamoto, Y., Yasuda, K., and Yoshida, T.

Subjects
DOUBLE beta decay, CRYSTAL growth, CRYSTALS
Abstract

We report on inorganic crystal purification for the search for the neutrinoless double-beta decay of 48Ca using CaF2 crystals. We are working on the purification of CaF2 crystal, which is made from water-insoluble raw materials. The goal of the purity in this crystal is ≤1 µBq/kg. We measured the impurities in the crucible and CaF2 powder before we made a molten product of the CaF2. We will consider the correlation between the purity contained in the materials around the crystal growth and the purity of the molten product. The material-selection policy and prospects for the large-volume detector system will be discussed. [ABSTRACT FROM AUTHOR]

Published
2023
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3. Purification of CaF2 crystal for double beta decay experiments

Author

Fushimi, K., primary, Imagawa, K., additional, Kishida, Y., additional, Kurosawa, S., additional, Orito, R., additional, Sakaue, A., additional, Takihira, Y., additional, Umehara, S., additional, Yamaji, A., additional, Yamamoto, Y., additional, Yasuda, K., additional, and Yoshida, T., additional

Published
2023
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6. Significance of Growth Differentiation Factor 15 (GDF15) in Relationship Between Physical Inactivity and Cognitive Impairment in COPD

Author

Hirano, T., primary, Takahashi, S., additional, Donishi, T., additional, Yasuda, K., additional, Suga, K., additional, Mimura, Y., additional, Doi, K., additional, Murakawa, K., additional, Chikumoto, A., additional, Ohteru, Y., additional, Matsuda, K., additional, Murata, Y., additional, Hamada, K., additional, Suetake, R., additional, Oishi, K., additional, Yamaji, Y., additional, Asami, M., additional, Edakuni, N., additional, and Matsunaga, K., additional

Published
2020
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11. Correlative Imaging of Live Biological Cells with a Soft X-ray Microscope and a Fluorescence Microscope.

Author

Kado, M., Kishimoto, M., Tamotsu, S., Yasuda, K., Aoyama, M., Tone, S., and Shinohara, K.

Subjects
X-ray microscopy, FLUORESCENCE microscopy, HYDRATION, CELL imaging, ORGANELLES
Abstract

A laser-plasma soft X-ray microscope which is a combination of a highly intense laser-plasma soft X-ray source and a contact microscopy has been developed. We have proposed a correlative imaging method with the laser-plasma soft X-ray microscope and a fluorescence microscope to observe the same biological cells with the both microscopes at the same time. Live hydrated biological cells and cellular organelles have been observed with the correlative imaging method. Using the information of the cellular organelles obtained with the fluorescence microscope, inner structures obtained with the soft X-ray microscope are identified. Since the spatial resolution of the soft X-ray microscope is much higher than that of the fluorescence microscope, fine structures of the cellular organelles of the live biological cells have been visualized with the correlative imaging. [ABSTRACT FROM AUTHOR]

Published
2015
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14. Search for neutrino-less double beta decay with CANDLES

Author

Umehara, S., primary, Kishimoto, T., additional, Nomachi, M., additional, Yoshida, S., additional, Matsuoka, K., additional, Ichimura, K., additional, Ito, G., additional, Yasuda, K., additional, Kakubata, H., additional, Miyashita, M., additional, Saka, M., additional, Seki, K., additional, Takubo, K., additional, Wang, W., additional, Ajimura, S., additional, Nakatani, N., additional, Tamagawa, Y., additional, Ogawa, I., additional, Fushimi, K., additional, Hazama, R., additional, Ohsumi, H., additional, Okada, K., additional, Fujii, Y., additional, Nomura, M., additional, Kaneshiki, T., additional, Sakuma, Y., additional, Suzuki, T., additional, and Nemoto, S., additional

Published
2012
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17. Low radioactivity CaF[sub 2] scintillator crystals for CANDLES

Author

Ogawa, I., primary, Kishimoto, T., additional, Umehara, S., additional, Ito, G., additional, Yasuda, K., additional, Kakubata, H., additional, Miyashita, M., additional, Matsuoka, K., additional, Nomachi, M., additional, Fushimi, K., additional, Hazama, R., additional, Ohsumi, H., additional, Okada, K., additional, Tamagawa, Y., additional, and Yoshida, S., additional

Published
2011
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19. Neutrino-less Double Beta Decay of [sup 48]Ca -CANDLES—

Author

Kishimoto, T., primary, Yoshida, S., additional, Matsuoka, K., additional, Ichimura, K., additional, Ito, G., additional, Yasuda, K., additional, Kakubata, H., additional, Miyashita, M., additional, Takubo, K., additional, Nomachi, M., additional, Saka, M., additional, Seki, K., additional, Ajimura, S., additional, Umehara, S., additional, Nakatani, N., additional, Tamagawa, Y., additional, Ogawa, I., additional, Fushimi, K., additional, Hazama, R., additional, Ohsumi, H., additional, Okada, K., additional, Fujii, Y., additional, Hosaka, Atsushi, additional, Khemchandani, Kanchan, additional, Nagahiro, Hideko, additional, and Nawa, Kanabu, additional

Published
2011
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21. Study of Double Beta Decay of [sup 48]Ca by CANDLES

Author

Umehara, S., primary, Kishimoto, T., additional, Ogawa, I., additional, Matsuoka, K., additional, Ito, G., additional, Yasuda, K., additional, Kakubata, H., additional, Miyashita, M., additional, Nomachi, M., additional, Ajimura, S., additional, Tamagawa, Y., additional, Fushimi, K., additional, Hazama, R., additional, Ohsumi, H., additional, Okada, K., additional, Yoshida, S., additional, Fujii, Y., additional, Ozawa, Akira, additional, and Lu, Weiping, additional

Published
2010
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33. Dipole Resonances in 4He

Author

Matsumoto, E., primary, Nakayama, S., additional, Hayami, R., additional, Fushimi, K., additional, Kawasuso, H., additional, Yasuda, K., additional, Yamagata, T., additional, Akimune, H., additional, Ikemizu, H., additional, Fujiwara, M., additional, Yosoi, M., additional, Nakanishi, K., additional, Kawase, K., additional, Hashimoto, H., additional, Oota, T., additional, Sagara, K., additional, Kudoh, T., additional, Asaji, S., additional, Ishida, T., additional, Tanaka, M., additional, and Greenfield, M. B., additional

Published
2007
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37. New Four-stroke Diesel Engine Oil Standards for Japanese Market: JASO DH-2 and DL-1

Author

Hoshino, Takashi, primary, Kubo, Koichi, additional, Nakamura, K., additional, Yamashita, M., additional, Hashimoto, T., additional, Tomizawa, K., additional, Ukai, T., additional, Iwamoto, S., additional, Yamamoto, H., additional, Naitoh, Y., additional, Yashima, H., additional, Ueda, K., additional, Nemoto, S., additional, Ishikawa, T., additional, Yamada, K., additional, Suzuki, T., additional, Negishi, T., additional, Kotaka, K., additional, Takeoka, K., additional, Takagi, K., additional, Okubo, M., additional, Yasuda, K., additional, Kamitamari, T., additional, and Tawa, K., additional

Published
2005
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41. Neutrino-less Double Beta Decay of 48Ca -CANDLES-.

Author

Kishimoto, T., Yoshida, S., Matsuoka, K., Ichimura, K., Ito, G., Yasuda, K., Kakubata, H., Miyashita, M., Takubo, K., Nomachi, M., Saka, M., Seki, K., Ajimura, S., Umehara, S., Nakatani, N., Tamagawa, Y., Ogawa, I., Fushimi, K., Hazama, R., and Ohsumi, H.

Subjects
NEUTRINOS, DOUBLE beta decay, PHYSICS experiments, NUCLEAR counters, LEPTONS (Nuclear physics), NUCLEAR matter
Abstract

Neutrino-less double beta decay (0νββ) is currently known to be an only experiment to verify whether lepton number is conserved or not. The lepton number non-conservation is the key to create matter dominated universe with CP violation. The so-called leptogenesys scenario presents a way to create the matter dominated universe by these violations. If neutrinos have Majorana mass, transition from a particle to an anti-particle is possible and the left-handed and right-handed neutrinos could have different masses. It is highly likely that the neutrinos are Majorana particles. We have been studying double beta decay of 48Ca. Our first stage experiment using the ELEGANT VI detector system gave the best lower limit of the half life of 0νββ of 48Ca. We have been working on CANDLES detector system to sense much longer lifetime region. We have developed techniques to reduce backgrounds. The CADLES detector system was installed at Kamioka underground laboratory. Here I describe a schematic view of the system. [ABSTRACT FROM AUTHOR]

Published
2011
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42. Low radioactivity CaF2 scintillator crystals for CANDLES.

Author

Ogawa, I., Kishimoto, T., Umehara, S., Ito, G., Yasuda, K., Kakubata, H., Miyashita, M., Matsuoka, K., Nomachi, M., Fushimi, K., Hazama, R., Ohsumi, H., Okada, K., Tamagawa, Y., and Yoshida, S.

Subjects
RADIOACTIVITY, SCINTILLATORS, DOUBLE beta decay, ORIGANUM, NEUTRINOS
Abstract

CANDLES is the project to search for neutrinoless double beta (0νββ) decay of 48Ca by using CaF2 scintillators. The observation of 0νββ decay will prove the existence of massive Majorana neutrinos. Expected performances and current status of the CANDLES system are described. [ABSTRACT FROM AUTHOR]

Published
2011
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49. Study of Double Beta Decay of 48Ca by CANDLES.

Author

Umehara, S., Kishimoto, T., Ogawa, I., Matsuoka, K., Ito, G., Yasuda, K., Kakubata, H., Miyashita, M., Nomachi, M., Ajimura, S., Tamagawa, Y., Fushimi, K., Hazama, R., Ohsumi, H., Okada, K., Yoshida, S., and Fujii, Y.

Subjects
RADIOACTIVE decay, ENGINEERING instruments, DETECTORS, SCINTILLATION counters, DOUBLE beta decay
Abstract

CANDLES is the project to search for neutrino-less double beta decay (0νββ) of 48Ca. The observation of 0νββ will prove existence of a massive Majorana neutrino. We have developed the new detector system CANDLES which features CaF2 (pure) scintillators. Here expected performances of the system for background rejection are presented. It is also described current status of development for the detector system. [ABSTRACT FROM AUTHOR]

Published
2010
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