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28 results on '"Y., Kotaka"'

1. The SrTiO3/BiFeO3 (001) interface: commutativity of energy band discontinuities

Author

R Schafranek, J D Baniecki, M Ishii, Y Kotaka, and K Kurihara

Subjects
Science, Physics, QC1-999
Abstract

The interface formation between the perovskite oxides SrTiO _3 and BiFeO _3 was studied using in situ photoelectron spectroscopy by depositing BiFeO _3 on SrTiO _3 and vice versa via pulsed laser deposition. For the interfaces characterized, a type II band alignment with a valence band offset of 0.9–1.0 eV and a conduction band offset of 0.5–0.6 eV was observed. Within the margin of error the commutativity was fulfilled for the SrTiO _3 /BiFeO _3 interface, meaning that the band alignment does not depend on the deposition sequence.

Published
2013
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2. New results from a search for v(mu) -> v(tau) and v(e) -> v(tau) oscillation

Author

E. Eskut, A. Kayis Topaksu, G. Onengut, R. v. Dantzig, M. d. Jong, J. Konijn, O. Melzer, R. G. C., E. Pesen, C. A. F. , J. W. E., J. L. Visschers, M. Guler, M. Serin Zeyrek, R. Sever, P. Tolun, M. T. Zeyrek, N. Armenise, F. Cassol, M. G. Catanesi, M. D. Serio, M. T. Muciaccia, E. Radicioni, P. Righini, S. Simone, L. Vivolo, A. Bulte, K. Winter, P. Annis, R. El Aidi, M. V. Donckt, B. V. de, P. Vilain, G. Wilquet, B. Saitta, E. D. Capua, Y. Ishii, M. Kazuno, S. Ogawa, H. Shibuya, J. Brunner, M. Chizhou, D. Cussans, M. Doucet, J. P. Fabre, W. Flegel, M. Litmaath, H. Meinhard, E. Niu, H. Overas, J. Panman, I. M. Papdopoulos, S. Ricciardi, A. Rozanov, D. Saltzberg, P. Strolin, R. Tsenov, C. Weinheimer, H. Wong, P. Zucchelli, J. Goldberg, M. Chikawa, E. Arik, A. A. Mailov, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, G. Brooijmans, D. Favart, G. Gregoire, J. Herin, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, I. Tsukerman, D. Bonekamper, N. D'Ambrosio, D. Frekers, D. Rondeshagen, T. Wolff, K. Hoshino, M. Komatsu, Y. Kotaka, T. Kozaki, M. Miyanishi, M. Nakamura, T. Nakano, K. Niu, K. Niwa, Y. Obayashi, O. Sato, T. Toshito, N. Bruski, S. Buontempo, A. G. Cocco, G. D. Lellis, F. D. Capua, A. Ereditato, T. Kawamura, R. Listone, M. Messina, P. Migliozzi, V. Tioukov, K. Nakamura, T. Okusawa, A. Capone, D. D. Pedis, S. D. Liberto, U. Dore, P. F. Loverre, L. Ludovici, A. Maslennikov, G. Piredda, G. Rosa, R. Santacesaria, A. Satta, F. R. Spada, E. Barbuto, C. Bozza, G. Grella, G. Romano, S. Sorrentino, Y. Sato, I. Tezuka, FIORILLO, GIULIANA, PALLADINO, VITTORIO, E., Eskut, A., Kayis Topaksu, G., Onengut, R. v., Dantzig, M. d., Jong, J., Konijn, O., Melzer, R. G., C., E., Pesen, C. A. F., J. W. E., J. L., Visscher, M., Guler, M., Serin Zeyrek, R., Sever, P., Tolun, M. T., Zeyrek, N., Armenise, F., Cassol, M. G., Catanesi, M. D., Serio, M. T., Muciaccia, E., Radicioni, P., Righini, S., Simone, L., Vivolo, A., Bulte, K., Winter, P., Anni, R., El Aidi, M. V., Donckt, B. V., De, P., Vilain, G., Wilquet, B., Saitta, E. D., Capua, Y., Ishii, M., Kazuno, S., Ogawa, H., Shibuya, J., Brunner, M., Chizhou, D., Cussan, M., Doucet, J. P., Fabre, W., Flegel, M., Litmaath, H., Meinhard, E., Niu, H., Overa, J., Panman, I. M., Papdopoulo, S., Ricciardi, A., Rozanov, D., Saltzberg, P., Strolin, R., Tsenov, C., Weinheimer, H., Wong, P., Zucchelli, J., Goldberg, M., Chikawa, E., Arik, A. A., Mailov, J. S., Song, C. S., Yoon, K., Kodama, N., Ushida, S., Aoki, T., Hara, G., Brooijman, D., Favart, G., Gregoire, J., Herin, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, I., Tsukerman, D., Bonekamper, N., D'Ambrosio, D., Freker, D., Rondeshagen, T., Wolff, K., Hoshino, M., Komatsu, Y., Kotaka, T., Kozaki, M., Miyanishi, M., Nakamura, T., Nakano, K., Niu, K., Niwa, Y., Obayashi, O., Sato, T., Toshito, N., Bruski, S., Buontempo, A. G., Cocco, G. D., Lelli, F. D., Capua, A., Ereditato, Fiorillo, Giuliana, T., Kawamura, R., Listone, M., Messina, P., Migliozzi, Palladino, Vittorio, V., Tioukov, K., Nakamura, T., Okusawa, A., Capone, D. D., Pedi, S. D., Liberto, U., Dore, P. F., Loverre, L., Ludovici, A., Maslennikov, G., Piredda, G., Rosa, R., Santacesaria, A., Satta, F. R., Spada, E., Barbuto, C., Bozza, G., Grella, G., Romano, S., Sorrentino, Y., Sato, and I., Tezuka

Subjects
CHORUS EXPERIMENT, LIMITS, NU%28TAU%29+OSCILLATION%22">NU(MU)->NU(TAU) OSCILLATION, SYSTEM
Abstract

A first analysis of the complete set of data collected by CHORUS in the years 1994-1997 is presented. The search for nu (tau) charged current events has been performed for both leptonic and hadronic decays of the tau lepton. No tau candidate has been found, A nu (tau) --> nu (tau) mixing is excluded down to sin(2)2 theta (mu tau) = 6.8 x 10(-4) for large Deltam(2) (90% C.L.). (C) 2001 Elsevier Science B.V. All rights reserved.

Published
2001

3. A search for nu(mu)->nu(tau) oscillation

Author

E. Eskut, A. Kayis, G. Onengut, R. v. Dantzig, M. d. Jong, J. Konijn, O. Melzer, R. G. C. , C. A. F., J. W. E., J. L. Visschers, A. S. Ayan, E. Pesen, M. Serin Zeyrek, R. Sever, P. Tolun, M. T. Zeyrek, N. Armenise, F. Cassol, M. G. Catanesi, M. T. Muciaccia, E. Radicioni, S. Simone, L. Vivolo, A. Bulte, P. Lendermann, A. Meyer Sievers, T. Patzak, K. Winter, P. Annis, M. Gruwe, C. Mommaert, M. V. Donckt, B. V. de, P. Vilain, G. Wilquet, P. Righini, B. Saitta, E. D. Capua, C. Luppi, P. Zucchelli, Y. Ishii, T. Kawamura, M. Kazuno, S. Ogawa, H. Shibuya, R. Beyer, J. Brunner, D. Cussans, J. P. Fabre, R. Ferreira, W. Flegel, R. Gurin, M. Litmaath, L. Ludovici, D. Macina, R. M. Drees, H. Meinhard, P. Migliozzi, E. Niu, H. Overas, J. Panman, I. M. Papadopoulos, F. Riccardi, S. Ricciardi, A. Rozanov, D. Saltzberg, R. Santacesaria, G. Stefanini, R. Tsenov, C. Weinheimer, H. Wong, J. Goldberg, K. Hoepfner, M. Chikawa, E. Arik, I. Birol, A. A. Mailov, C. H. Hahn, H. I. Jang, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, G. Brooijmans, D. Favart, G. Gregoire, J. Herin, V. Lemaitre, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, V. Smirnitsky, D. Bonekamper, D. Frekers, D. Rondeshagen, T. Wolff, K. Hoshino, M. Kobayashi, Y. Kotaka, T. Kozaki, M. Miyanishi, M. Nakamura, K. Nakazawa, T. Nakano, K. Niu, K. Niwa, Y. Obayashi, O. Sato, T. Toshito, S. Buontempo, A. Cocco, N. D'Ambrosio, G. D. Lellis, A. Ereditato, F. Marchetti Stasi, M. Messina, PALLADINO, VITTORIO, S. Sorrentino, P. Strolin, K. Nakamura, T. Okusawa, T. Yoshida, A. Capone, D. D. Pedis, S. D. Liberto, U. Dore, P. F. Loverre, A. Maslennikov, M. A. Mazzoni, F. Meddi, G. Piredda, A. d. Bartolomeo, C. Bozza, G. Grella, G. Iovane, G. Romano, G. Rosa, Y. Sato, I. Tezuka, FIORILLO, GIULIANA, GARUFI, FABIO, E., Eskut, A., Kayi, G., Onengut, R. v., Dantzig, M. d., Jong, J., Konijn, O., Melzer, R. G. C., C. A. F., J. W., E., J. L., Visscher, A. S., Ayan, E., Pesen, M., Serin Zeyrek, R., Sever, P., Tolun, M. T., Zeyrek, N., Armenise, F., Cassol, M. G., Catanesi, M. T., Muciaccia, E., Radicioni, S., Simone, L., Vivolo, A., Bulte, P., Lendermann, A., Meyer Siever, T., Patzak, K., Winter, P., Anni, M., Gruwe, C., Mommaert, M. V., Donckt, B. V., De, P., Vilain, G., Wilquet, P., Righini, B., Saitta, E. D., Capua, C., Luppi, P., Zucchelli, Y., Ishii, T., Kawamura, M., Kazuno, S., Ogawa, H., Shibuya, R., Beyer, J., Brunner, D., Cussan, J. P., Fabre, R., Ferreira, W., Flegel, R., Gurin, M., Litmaath, L., Ludovici, D., Macina, R. M., Dree, H., Meinhard, P., Migliozzi, E., Niu, H., Overa, J., Panman, I. M., Papadopoulo, F., Riccardi, S., Ricciardi, A., Rozanov, D., Saltzberg, R., Santacesaria, G., Stefanini, R., Tsenov, C., Weinheimer, H., Wong, J., Goldberg, K., Hoepfner, M., Chikawa, E., Arik, I., Birol, A. A., Mailov, C. H., Hahn, H. I., Jang, I. G., Park, M. S., Park, J. S., Song, C. S., Yoon, K., Kodama, N., Ushida, S., Aoki, T., Hara, G., Brooijman, D., Favart, G., Gregoire, J., Herin, V., Lemaitre, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, V., Smirnitsky, D., Bonekamper, D., Freker, D., Rondeshagen, T., Wolff, K., Hoshino, M., Kobayashi, Y., Kotaka, T., Kozaki, M., Miyanishi, M., Nakamura, K., Nakazawa, T., Nakano, K., Niu, K., Niwa, Y., Obayashi, O., Sato, T., Toshito, S., Buontempo, A., Cocco, N., D'Ambrosio, G. D., Lelli, A., Ereditato, Fiorillo, Giuliana, Garufi, Fabio, F., Marchetti Stasi, M., Messina, Palladino, Vittorio, S., Sorrentino, P., Strolin, K., Nakamura, T., Okusawa, T., Yoshida, A., Capone, D. D., Pedi, S. D., Liberto, U., Dore, P. F., Loverre, A., Maslennikov, M. A., Mazzoni, F., Meddi, G., Piredda, A. d., Bartolomeo, C., Bozza, G., Grella, G., Iovane, G., Romano, G., Rosa, Y., Sato, and I., Tezuka

Subjects
LIMITS, LIGHT, NEUTRINO
Abstract

CHORUS is an experiment searching for nu(mu) --> nu(tau) oscillation in the CERN wide band neutrino beam with a hybrid setup consisting of a nuclear emulsion target followed by electronic detectors. The experiment has been taking data from 1994 through 1997. A subset of the neutrino interactions collected in 1994 and 1995 have been analyzed, looking for nu(tau) charged current interactions where the tau lepton decays to mu(mu)nu(tau). In a sample of 31,423 nu(mu) charged current interactions, no nu(tau) candidates were found. For large Delta m(mu tau)(2) values, a limit on the mixing angle of sin(2)2 theta(mu tau) < 3.5 x 10(-3) at 90% C.L. can be set, thus improving the previous best result. (C) 1998 Elsevier Science B.V.

Published
1998

4. Observation of neutrino induced diffractive D-s*(+) production and subsequent decay D-s*(+)-> D-s(+)->tau(+)->mu(+)

Author

P. Annis, S. Aoki, A. Artamonov, E. Barbuto, A. d. Bartolomeo, D. Bonekamper, C. Bozza, C. Brooijmans, J. Brunner, A. Bulte, S. Buontempo, A. Capone, F. Cassol, M. G. Catanesi, M. Chikawa, A. Cocco, D. Cussans, N. D'Ambrosio, R. v. Dantzig, G. D. Lellis, D. D. Pedis, E. D. Capua, U. Dore, R. E. Aidi, A. Ereditato, D. Favart, R. Ferreira, D. Frekers, J. Goldberg, P. Gorbunov, G. Gregoire, G. Grella, T. Hara, J. Herin, K. Hoshino, G. Iovane, Y. Ishii, M. d. Jong, T. Kawamura, A. Kayis, M. Kazuno, V. Khovansky, K. Kodama, M. Komatsu, J. Konijn, Y. Kotaka, T. Kozaki, M. Litmaath, P. F. Loverre, L. Ludovici, M. Meinhard, O. Melzer, M. Messina, P. Migliozzi, M. Miyanishi, M. T. Muciaccia, K. Nakamura, M. Nakamura, T. Nakano, E. Niu, K. Niu, K. Niwa, Y. Obayashi, S. Ogawa, T. Okusawa, R. G. C., G. Onengut, H. Overas, J. Panman, I. M. Papadopoulos, I. G. Park, E. Pesen, G. Piredda, C. A. F., E. Radicioni, S. Ricciardi, P. Righini, G. Romano, D. Rondeshagen, G. Rosa, D. Saltzberg, B. Saitta, R. Santacesaria, O. Sato, Y. Sato, A. Satta, V. Shamanov, H. Shibuya, S. Simone, J. S. Song, S. Sorrentino, P. Strolin, I. Tezuka, V. Tioukov, P. Tolun, T. Toshito, R. Tsenov, J. W. E., N. Ushida, M. V. Dockt, B. V. de, P. Vilain, J. L. Visschers, L. Vivolo, C. Weinheimer, G. Wilquet, K. Winter, T. Wolff, H. Wong, C. S. Yoon, M. T. Zeyrek, P. Zucchelli, FIORILLO, GIULIANA, PALLADINO, VITTORIO, P., Anni, S., Aoki, A., Artamonov, E., Barbuto, A. d., Bartolomeo, D., Bonekamper, C., Bozza, C., Brooijman, J., Brunner, A., Bulte, S., Buontempo, A., Capone, F., Cassol, M. G., Catanesi, M., Chikawa, A., Cocco, D., Cussan, N., D'Ambrosio, R. v., Dantzig, G. D., Lelli, D. D., Pedi, E. D., Capua, U., Dore, R. E., Aidi, A., Ereditato, D., Favart, R., Ferreira, Fiorillo, Giuliana, D., Freker, J., Goldberg, P., Gorbunov, G., Gregoire, G., Grella, T., Hara, J., Herin, K., Hoshino, G., Iovane, Y., Ishii, M. d., Jong, T., Kawamura, A., Kayi, M., Kazuno, V., Khovansky, K., Kodama, M., Komatsu, J., Konijn, Y., Kotaka, T., Kozaki, M., Litmaath, P. F., Loverre, L., Ludovici, M., Meinhard, O., Melzer, M., Messina, P., Migliozzi, M., Miyanishi, M. T., Muciaccia, K., Nakamura, M., Nakamura, T., Nakano, E., Niu, K., Niu, K., Niwa, Y., Obayashi, S., Ogawa, T., Okusawa, R. G., C., G., Onengut, H., Overa, Palladino, Vittorio, J., Panman, I. M., Papadopoulo, I. G., Park, E., Pesen, G., Piredda, C. A., F., E., Radicioni, S., Ricciardi, P., Righini, G., Romano, D., Rondeshagen, G., Rosa, D., Saltzberg, B., Saitta, R., Santacesaria, O., Sato, Y., Sato, A., Satta, V., Shamanov, H., Shibuya, S., Simone, J. S., Song, S., Sorrentino, P., Strolin, I., Tezuka, V., Tioukov, P., Tolun, T., Toshito, R., Tsenov, J. W., E., N., Ushida, M. V., Dockt, B. V., De, P., Vilain, J. L., Visscher, L., Vivolo, C., Weinheimer, G., Wilquet, K., Winter, T., Wolff, H., Wong, C. S., Yoon, M. T., Zeyrek, and P., Zucchelli

Subjects
PHYSICS, FRAGMENTATION, VECTOR-MESONS
Abstract

We report on the first direct observation of a neutrino induced charged-current interaction with two subsequent decays of short-lived particles close to the interaction vertex. This rare double-kink signature in the CHORUS emulsion target is interpreted as a D-s*(+) production followed by the decay chain D-s*(+) --> D-s(+) gamma, D-s(+) --> tau(+) v(tau),tau(+) --> mu(+) v(mu)v(tau). The event is characterised by small Q(2) and small four-momentum transfer squared t to the target nucleon, which indicates a diffractive production mechanism. A complete analysis of the event is presented. (C) 1998 Elsevier Science B.V. All rights reserved.

Published
1998

5. Search for nu(mu) -> nu(tau) oscillation using the tau decay modes into a single charged particle

Author

E. Eskut, A. Kayis, G. Onengut, R. v. Dantzig, M. d. Jong, J. Konijn, O. Melzer, R. G. C. , C. A. F., J. W. E., J. L. Visschers, M. Guler, M. Serin Zeyrek, R. Sever, P. Tolun, M. T. Zeyrek, N. Armenise, F. Cassol, M. G. Catanesi, M. T. Muciaccia, E. Radicioni, S. Simone, L. Vivolo, A. Bulte, T. Patzak, K. Winter, P. Annis, R. E. Aidi, M. Gruwe, C. Mommaert, M. V. Donckt, B. V. de, P. Vilain, G. Wilquet, P. Righini, B. Saitta, E. D. Capua, C. Luppi, P. Zucchelli, Y. Ishii, T. Kawamura, M. Kazuno, S. Ogawa, H. Shibuya, J. Brunner, D. Cussans, J. P. Fabre, R. Ferreira, W. Flegel, M. Litmaath, D. Macina, R. M. Drees, H. Meinhard, P. Migliozzi, E. Niu, H. Overas, J. Panman, I. M. Papadopoulos, E. Pesen, F. Riccardi, S. Ricciardi, A. Rozanov, D. Salzberg, P. Strolin, R. Tsenov, C. Weinheimer, H. Wong, J. Goldberg, K. Hoepfner, M. Chikawa, E. Arik, A. A. Mailov, H. I. Jang, I. G. Park, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, G. Brooijmans, D. Favart, G. Gregoire, J. Herin, A. Artamonov, P. Gorbunov, V. Khovansky, V. Shamanov, D. Bonekamper, D. Frekers, D. Rondeshagen, T. Wolff, K. Hoshino, M. Kobayashi, M. Komatsu, Y. Kotaka, T. Kozaki, M. Miyanishi, M. Nakamura, K. Nakazawa, T. Nakano, K. Niu, K. Niwa, Y. Obayashi, O. Sato, T. Toshito, S. Buontempo, A. Cocco, N. D'Ambrosio, G. D. Lellis, A. Ereditato, M. Messina, S. Sorrentino, V. Tioukov, K. Nakamura, T. Okusawa, T. Yoshida, A. Capone, D. D. Pedis, S. D. Liberto, U. Dore, P. F. Loverre, L. Ludovici, A. Maslennikov, M. A. Mazzoni, G. Piredda, R. Santacesaria, A. Satta, E. Barbuto, A. d. Bartolomeo, C. Bozza, G. Grella, G. Iovane, G. Romano, G. Rosa, Y. Sato, I. Tezuka, FIORILLO, GIULIANA, GARUFI, FABIO, PALLADINO, VITTORIO, E., Eskut, A., Kayi, G., Onengut, R. v., Dantzig, M. d., Jong, J., Konijn, O., Melzer, R. G. C., C. A. F., J. W., E., J. L., Visscher, M., Guler, M., Serin Zeyrek, R., Sever, P., Tolun, M. T., Zeyrek, N., Armenise, F., Cassol, M. G., Catanesi, M. T., Muciaccia, E., Radicioni, S., Simone, L., Vivolo, A., Bulte, T., Patzak, K., Winter, P., Anni, R. E., Aidi, M., Gruwe, C., Mommaert, M. V., Donckt, B. V., De, P., Vilain, G., Wilquet, P., Righini, B., Saitta, E. D., Capua, C., Luppi, P., Zucchelli, Y., Ishii, T., Kawamura, M., Kazuno, S., Ogawa, H., Shibuya, J., Brunner, D., Cussan, J. P., Fabre, R., Ferreira, W., Flegel, M., Litmaath, D., Macina, R. M., Dree, H., Meinhard, P., Migliozzi, E., Niu, H., Overa, J., Panman, I. M., Papadopoulo, E., Pesen, F., Riccardi, S., Ricciardi, A., Rozanov, D., Salzberg, P., Strolin, R., Tsenov, C., Weinheimer, H., Wong, J., Goldberg, K., Hoepfner, M., Chikawa, E., Arik, A. A., Mailov, H. I., Jang, I. G., Park, J. S., Song, C. S., Yoon, K., Kodama, N., Ushida, S., Aoki, T., Hara, G., Brooijman, D., Favart, G., Gregoire, J., Herin, A., Artamonov, P., Gorbunov, V., Khovansky, V., Shamanov, D., Bonekamper, D., Freker, D., Rondeshagen, T., Wolff, K., Hoshino, M., Kobayashi, M., Komatsu, Y., Kotaka, T., Kozaki, M., Miyanishi, M., Nakamura, K., Nakazawa, T., Nakano, K., Niu, K., Niwa, Y., Obayashi, O., Sato, T., Toshito, S., Buontempo, A., Cocco, N., D'Ambrosio, G. D., Lelli, A., Ereditato, Fiorillo, Giuliana, Garufi, Fabio, M., Messina, Palladino, Vittorio, S., Sorrentino, V., Tioukov, K., Nakamura, T., Okusawa, T., Yoshida, A., Capone, D. D., Pedi, S. D., Liberto, U., Dore, P. F., Loverre, L., Ludovici, A., Maslennikov, M. A., Mazzoni, G., Piredda, R., Santacesaria, A., Satta, E., Barbuto, A. d., Bartolomeo, C., Bozza, G., Grella, G., Iovane, G., Romano, G., Rosa, Y., Sato, and I., Tezuka

Abstract

Part of the neutrino events collected in 1994-1995 by the CHORUS experiment has been analysed. A search was performed for nu(tau) charged current interactions followed by the tau lepton decay into a single charged negative hadron, a possible indication for nu(mu) --> nu(tau) oscillation. A sample of 6844 events without an identified muon has been located in the emulsion target. Within the selection criteria, no tau(-) candidate has been found. Combining this result with the one from the search fur nu(tau) interactions using the muonic decay mode (36182 events with an identified muon), a 90% C.L. limit on the mixing angle sin(2)2 theta(mu tau) < 1.8.10(-3) (at large Delta m(2)) has been derived. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

Published
1998

6. The CHORUS experiment to search for nu(mu)->nu(tau) oscillation

Author

E. Eskut, A. Kayis, G. Onengut, R. vanDantzig, J. Konijn, R. G. C. , C. A. F., J. W. E., J. L. Visschers, A. S. Ayan, E. Pesen, M. SerinZeyrek, R. Sever, P. Tolun, M. T. Zeyrek, N. Armenise, F. Cassol, M. G. Catanesi, M. T. Muciaccia, E. Radicioni, S. Simone, L. Vivolo, D. Eckstein, P. Lendermann, A. MeyerSievers, T. Patzak, K. Winter, P. Righini, B. Saitta, P. Annis, M. Gruwe, C. Mommaert, M. VanderDonckt, B. VandeVyver, P. Vilain, G. Wilquet, E. DiCapua, M. Ferroni, C. Luppi, S. Ricciardi, Y. Ishii, T. Kawamura, M. Kazuno, S. Ogawa, H. Shibuya, R. Beyer, J. Brunner, G. Carnevale, J. P. Fabre, R. Ferreira, W. Flegel, R. Gurin, M. deJong, M. Litmaath, L. Ludovici, D. Macina, R. M. Drees, H. Meinhard, E. Niu, H. Overas, J. Panman, F. Riccardi, A. Rozanov, D. Saltzberg, G. Stefanini, R. Tzenov, C. Weinheimer, H. T. Wong, P. Zucchelli, J. Goldberg, K. Hoepfner, H. Chikawa, E. Arik, I. Birol, A. A. Mailov, C. H. Hahn, H. I. Jang, J. Y. Kim, S. N. Kim, I. G. Park, M. S. Park, J. S. Song, C. S. Yoon, K. Kodama, N. Ushida, S. Aoki, T. Hara, G. Brooijmans, D. Favart, G. Gregoire, J. Herin, V. Lemaitre, A. Artamonov, V. Epstein, P. Gorbunov, V. Khovansky, V. Shamanov, V. Smirnitsky, D. Bonekamper, D. Frekers, D. Rondeshagen, T. Wolff, K. Hoshino, M. Kobayashi, M. Komatzu, Y. Kotaka, T. Kozaki, M. Miyanishi, M. Nakamura, T. Nakano, K. Niu, K. Niwa, Y. Obayashi, O. Sato, T. Toshito, S. Buontempo, L. Casagrande, A. G. Cocco, N. DAmbrosio, A. Ereditato, F. MarchettiStasi, M. Messina, P. Migliozzi, S. Sorrentino, P. Strolin, K. Nakamura, T. Okusawa, T. Yoshida, A. Capone, D. DePedis, S. DiLiberto, U. Dore, P. F. Loverre, A. Maslennikov, M. A. Mazzoni, F. Meddi, G. Piredda, R. Santacesaria, A. D. Bartolomeo, C. Bozza, G. Grella, G. Iovane, G. Romano, G. Rosa, Y. Sato, I. Tezuka, FIORILLO, GIULIANA, GARUFI, FABIO, PALLADINO, VITTORIO, E., Eskut, A., Kayi, G., Onengut, R., Vandantzig, J., Konijn, R. G. C., C. A. F., J. W., E., J. L., Visscher, A. S., Ayan, E., Pesen, M., Serinzeyrek, R., Sever, P., Tolun, M. T., Zeyrek, N., Armenise, F., Cassol, M. G., Catanesi, M. T., Muciaccia, E., Radicioni, S., Simone, L., Vivolo, D., Eckstein, P., Lendermann, A., Meyersiever, T., Patzak, K., Winter, P., Righini, B., Saitta, P., Anni, M., Gruwe, C., Mommaert, M., Vanderdonckt, B., Vandevyver, P., Vilain, G., Wilquet, E., Dicapua, M., Ferroni, C., Luppi, S., Ricciardi, Y., Ishii, T., Kawamura, M., Kazuno, S., Ogawa, H., Shibuya, R., Beyer, J., Brunner, G., Carnevale, J. P., Fabre, R., Ferreira, W., Flegel, R., Gurin, M., Dejong, M., Litmaath, L., Ludovici, D., Macina, R. M., Dree, H., Meinhard, E., Niu, H., Overa, J., Panman, F., Riccardi, A., Rozanov, D., Saltzberg, G., Stefanini, R., Tzenov, C., Weinheimer, H. T., Wong, P., Zucchelli, J., Goldberg, K., Hoepfner, H., Chikawa, E., Arik, I., Birol, A. A., Mailov, C. H., Hahn, H. I., Jang, J. Y., Kim, S. N., Kim, I. G., Park, M. S., Park, J. S., Song, C. S., Yoon, K., Kodama, N., Ushida, S., Aoki, T., Hara, G., Brooijman, D., Favart, G., Gregoire, J., Herin, V., Lemaitre, A., Artamonov, V., Epstein, P., Gorbunov, V., Khovansky, V., Shamanov, V., Smirnitsky, D., Bonekamper, D., Freker, D., Rondeshagen, T., Wolff, K., Hoshino, M., Kobayashi, M., Komatzu, Y., Kotaka, T., Kozaki, M., Miyanishi, M., Nakamura, T., Nakano, K., Niu, K., Niwa, Y., Obayashi, O., Sato, T., Toshito, S., Buontempo, L., Casagrande, A. G., Cocco, N., Dambrosio, A., Ereditato, Fiorillo, Giuliana, Garufi, Fabio, F., Marchettistasi, M., Messina, P., Migliozzi, Palladino, Vittorio, S., Sorrentino, P., Strolin, K., Nakamura, T., Okusawa, T., Yoshida, A., Capone, D., Depedi, S., Diliberto, U., Dore, P. F., Loverre, A., Maslennikov, M. A., Mazzoni, F., Meddi, G., Piredda, R., Santacesaria, A. D., Bartolomeo, C., Bozza, G., Grella, G., Iovane, G., Romano, G., Rosa, Y., Sato, and I., Tezuka

Subjects
CALIBRATION, ELECTRON-SCATTERING, LIMITS, HYBRID EXPERIMENT, PARTICLES, NEUTRINO-ELECTRON, CALORIMETER, PERFORMANCE, READOUT, DETECTOR
Abstract

A new experimental apparatus, designed principally for a high sensitivity search for nu( --> mu(tau) oscillation, has been successfully constructed and made operational by the CHORUS Collaboration for the CERN-WA95 experiment. It consists of a large emulsion target, a scintillating fiber tracker system with optoelectronics read-out, an air-core magnet, a set of trigger hodoscopes, a calorimeter based on the lead/scintillating-fiber technique, and a muon spectrometer. The design, construction and performance of the entire apparatus and of the different detectors are described.

Published
1997

7. The CHORUS experiment to search for ν_μ→ν_τ oscillation

Author

K. Hoepfner, Motoaki Miyanishi, P. Annis, A. Capone, G. Grella, E. Niu, Nicola D'Ambrosio, B. Saitta, G. Grégoire, T. Kawamura, Alfredo G. Cocco, Salvatore Buontempo, David Saltzberg, M. Litmaath, Kimio Niwa, Y. Obayashi, F. Riccardi, G. Rosa, E. Arik, R. Santacesaria, U. Dore, Matteo Ferroni, M. G. Catanesi, C. Mommaert, S. Sorrentino, N. Ushida, S. N. Kim, H. Chikawa, Vincent Lemaitre, M. Komatzu, K. Nakamura, F. Marchetti-Stasi, S. Ogawa, D. Frekers, L. Ludovici, J. Panman, D. C. Kim, Franco Meddi, M. Vander Donckt, Mehmet Zeyrek, Koichi Kodama, T. Kozaki, V. Khovansky, E. Pesen, T. Hara, Y. Kotaka, C. H. Hahn, Pierre Vilain, M. S. Park, G. Carnevale, K. Winter, Jean-Paul Fabre, V. Smirnitsky, D. Eckstein, D. Macina, M. Nakamura, D. Rondeshagen, E. Radicioni, Jürgen Brunner, P. Migliozzi, V. Palladino, Ch. Weinheimer, K. Hoshino, R. Gurin, Rudolf Oldeman, D. De Pedis, H. I. Jang, Henry T. Wong, J. W. E. Uiterwijk, R. Beyer, A. Artamonov, M. A. Mazzoni, Y. Ishii, A. S. Ayan, A. Maslennikov, G. Brooijmans, A. Kayis, F. Garufi, P. Lendermann, E. Di Capua, R. Ferreira, T. Yoshida, M. Messina, I. G. Park, G. Iovane, A. Meyer-Sievers, W. Flegel, C. S. Yoon, F. Cassol, Denis Favart, G. Romano, R. Tzenov, H. Øverȧs, R. van Dantzig, A. Di Bartolomeo, M. Serin-Zeyrek, Alexandre Rozanov, S. Simone, G. Fiorillo, H. Meinhard, S. Di Liberto, J. Konijn, V. Epstein, B. Van de Vyver, J. Hérin, A. Mailov, P. Zucchelli, J. S. Song, Shigeki Aoki, H. Shibuya, M. Kazuno, C. Luppi, J. L. Visschers, R. Meijer Drees, T. Patzak, K. Niu, T. Toshito, I. Tezuka, T. Okusawa, P. Strolin, T. Wolff, L. Casagrande, Gulsen Onengut, J. Y. Kim, P. Gorbunov, M. de Jong, J. Goldberg, Osamu Sato, L. Vivolo, Cristiano Bozza, Ramazan Sever, G. Piredda, Yoshihiro Sato, P. Righini, D. Bonekämper, M. T. Muciaccia, N. Armenise, Toshiyuki Nakano, S. Ricciardi, M. Gruwe, Inanc Birol, Antonio Ereditato, V. Shamanov, G. Stefanini, C.A.F.J. van der Poel, E. Eskut, Gaston Wilquet, P. Tolun, Makoto Kobayashi, and P. F. Loverre

Subjects
Physics, Nuclear and High Energy Physics, biology, Calorimeter (particle physics), Physics::Instrumentation and Detectors, Oscillation, Detector, Chorus, biology.organism_classification, Nuclear physics, Nuclear magnetic resonance, Muon spectrometer, Magnet, High Energy Physics::Experiment, Sensitivity (control systems), Neutrino oscillation, Instrumentation
Abstract

A new experimental apparatus, designed principally for a high sensitivity search for ν μ → ν τ oscillation, has been successlly constructed and made operational by the CHORUS Collaboration for the CERN-WA95 experiment. It consists of a large emulsion target, a scintillating fiber tracker system with optoelectronics read-out, an air-core magnet, a set of trigger hodoscopes, a calorimeter based on the lead/scintillating-fiber technique, and a muon spectrometer. The design, construction and performance of the entire apparatus and of the different detectors are described.

Published
1997

8. Direct S 0 → T n Transition under Visible Light Irradiation Enabling Synthesis of a Pseudoindoxyl Scaffold.

Author

Nakajima M, Nagasawa S, Yamazaki K, Yazawa T, Yoneyama H, Kotaka Y, and Nemoto T

Abstract

Pseudoindoxyl is a partial skeleton found in various natural products. Its light-absorption properties make it useful for the design of functional molecules. However, versatile synthesis methods have not yet been reported. In this report, we present a versatile synthetic method for pseudoindoxyls using the direct S 0 → T n transition under visible light irradiation. We also discuss the application of pseudoindoxyls as photocatalysts.

Published
2024
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9. Mutations identified in engineered Escherichia coli with a reduced genome.

Author

Kotaka Y, Hashimoto M, Lee KI, and Kato JI

Abstract

Characterizing genes that regulate cell growth and survival in model organisms is important for understanding higher organisms. Construction of strains harboring large deletions in the genome can provide insights into the genetic basis of cell growth compared with only studying wild-type strains. We have constructed a series of genome-reduced strains with deletions spanning approximately 38.9% of the E. coli chromosome. Strains were constructed by combining large deletions in chromosomal regions encoding nonessential gene groups. We also isolated strains Δ33b and Δ37c, whose growth was partially restored by adaptive laboratory evolution (ALE). Genome sequencing of nine strains, including those selected following ALE, identified the presence of several Single Nucleotide Variants (SNVs), insertions, deletions, and inversions. In addition to multiple SNVs, two insertions were identified in ALE strain Δ33b. The first was an insertion at the promoter region of pntA , which increased cognate gene expression. The second was an insertion sequence (IS) present in sibE , encoding the antitoxin in a toxin-antitoxin system, which decreased expression of sibE . 5 strains of Δ37c independently isolated following ALE harboring multiple SNVs and genetic rearrangements. Interestingly, a SNV was identified in the promoter region of hcaT in all five strains, which increased hcaT expression and, we predict, rescued the attenuated Δ37b growth. Experiments using defined deletion mutants suggested that hcaT encodes a 3-phenylpropionate transporter protein and is involved in survival during stationary phase under oxidative stress. This study is the first to document accumulation of mutations during construction of genome-reduced strains. Furthermore, isolation and analysis of strains derived from ALE in which the growth defect mediated by large chromosomal deletions was rescued identified novel genes involved in cell survival., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2023 Kotaka, Hashimoto, Lee and Kato.)

Published
2023
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10. Note: An innovative method for 12 C 4+ suppression in 18 O 6+ beam production in an electron cyclotron resonance ion source.

Author

Muto H, Ohshiro Y, Kotaka Y, Yamaguchi H, Sakemi Y, Kobayashi K, Nishimura M, Oyaizu M, Kubono S, Kase M, Hattori T, and Shimoura S

Abstract

It is a major and complex task to accelerate an ion which has the same charge to mass ratio with strong contaminant ions, such as 12 C 4+ in the 18 O 6+ beam. An innovative method has been developed to suppress the contaminant ions in the Electron Cyclotron Resonance (ECR) ion source by introducing Li vapor. The ion distribution inside the ECR zone was obtained by the optical analysis of ions inside the ECR ion source. The 12 C 4+ ions were suppressed as much as by a factor of 10, whereas the 18 O 6+ beam changed little with the use of this technique.

Published
2018
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11. Note: 6Li III light intensity observation for 6Li3+ ion beam operation at Hyper-Electron Cyclotron Resonance ion source.

Author

Muto H, Ohshiro Y, Yamaka S, Watanabe S, Oyaizu M, Yamaguchi H, Kobayashi K, Kotaka Y, Nishimura M, Kubono S, Kase M, Hattori T, and Shimoura S

Abstract

The light intensity of (6)Li III line spectrum at λ = 516.7 nm was observed during (6)Li(3+) beam tuning at the Hyper-Electron Cyclotron Resonance (ECR) ion source. Separation of ion species of the same charge to mass ratio with an electromagnetic mass analyzer is known to be an exceptionally complex process. However, (6)Li III line intensity observation conducted in this study gives new insights into its simplification of this process. The light intensity of (6)Li III line spectrum from the ECR plasma was found to have a strong correlation with the extracted (6)Li(3+) beam intensity from the RIKEN Azimuthal Varying Field cyclotron.

Published
2014
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12. Production of beams from solid materials at Center for Nuclear Study electron cyclotron resonance ion source.

Author

Ohshiro Y, Yamaka S, Watanabe S, Kobayashi K, Kotaka Y, Nishimura M, Kase M, Muto H, Yamaguchi H, and Shimoura S

Abstract

Two methods for the feed of vapor from solid materials in the Center for Nuclear Study ECR ion source are described. A rod placed near the wall of the plasma chamber, operating up to a melting point of 2600 °C, has been used for CaO, SiO2, and FeO. An oven with a number of openings, operating up to 800 °C, has been used for P2O5, Li, and S. Typical ion beam intensities of (7)Li(2+), (6)Li(3+), (40)Ca(12+), and (56)Fe(15+) are achieved 280, 75, 28, and 7 eμA, respectively. High intensity heavy ion beams are stably supplied into the azimuthally varying field cyclotron.

Published
2014
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13. Image formation mechanisms of spherical aberration corrected BF STEM imaging methods.

Author

Kotaka Y, Yamazaki T, Ohtsuka M, and Watanabe K

Abstract

In this study, we explore the formation mechanisms of different spherical-aberration (C(s))-corrected bright-field (BF) scanning transmission electron microscope (STEM) imaging methods. The C(s)-corrected BF STEM imaging modes are characterised in detail using simulated images and experimental BF STEM images obtained with several types of detectors. The Co₃O₄ specimen results show that the occupancy, the atomic spacing, and the atomic number of the atoms constituting the atomic columns control image formation in BF STEM imaging, which is used to detect light atomic columns. The middle-angle BF STEM image is crucial in image formation by BF STEM imaging., (© 2013 Elsevier B.V. All rights reserved.)

Published
2014
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14. Bloch wave simulations in the frozen lattice approximation.

Author

Yamazaki T, Ohtsuka M, Kotaka Y, and Watanabe K

Abstract

To simulate the effects of thermal diffuse scattering in the frozen lattice (FL) approximation, we modify the conventional Bloch wave method by applying the classical scattering matrix method. The present simulation method requires that the eigenvalue operation is executed only once for each partial incident wave using the atomic positions of the thermal equilibrium configuration and thus the calculation time decreases drastically. Furthermore, from a comparison of convergent beam electron diffraction (CBED) patterns simulated by the present method with the results of CBED patterns simulated by a multislice method, we confirm that FL approximation can be simulated by the dynamical simulation based on the Bloch wave method., (Copyright © 2013 Elsevier B.V. All rights reserved.)

Published
2013
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15. Imaging of light and heavy atomic columns by spherical aberration corrected middle-angle bright-field STEM.

Author

Ohtsuka M, Yamazaki T, Kotaka Y, Hashimoto I, and Watanabe K

Abstract

Simultaneous detection of both light and heavy atomic columns is theoretically and experimentally explored with spherical aberration (C(s))-corrected middle-angle bright-field (MABF) scanning transmission electron microscopy (STEM). Optimized MABF STEM visualizes both light O atomic columns and heavy Sr and Ti-O atomic columns for SrTiO₃(001) as distinct bright spots and dark spots with characteristic bright rings, respectively, over practical ranges of the probe-forming lens defocus and sample thickness, although medium-heavy Ti-O atomic columns appear as blurred dark spots. The difference in contrast between heavy and light atomic columns is greater than that of annular BF STEM images. The formation of distinctive bright and dark spots is interpreted simply as the difference in the degrees of localization and inelastic absorption of channeling electrons in individual atomic columns by analyses of convergent wave fields inside the crystal in both real and reciprocal space. In addition, Bloch wave expansion of MABF STEM images suggests that bright rings are formed mainly by 2p-like convergent Bloch wave fields localized on heavy atomic columns., (Copyright © 2012 Elsevier B.V. All rights reserved.)

Published
2012
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16. Analysis of EEL spectrum of low-loss region using the C(s)-corrected STEM-EELS method and multivariate analysis.

Author

Yamazaki T, Kotaka Y, and Kataoka Y

Abstract

We analyzed a Si/SiO(2) interface using multivariate analysis and spherical aberration-corrected scanning transmission electron microscopy-electron energy loss spectroscopy which is characterized by using the electron energy loss spectrum of the low-loss region. We extracted the low-loss spectra of Si, SiO(2) and an interface state. Even if the interface is formed from materials with different dielectric functions, the present method will prove suitable for obtaining a more quantitative understanding of the dielectric characteristic., (Copyright © 2011 Elsevier B.V. All rights reserved.)

Published
2011
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17. Study of atomic resolved plasmon-loss image by spherical aberration-corrected STEM-EELS method.

Author

Yamazaki T, Kotaka Y, Tsukada M, and Kataoka Y

Abstract

To gain an understanding of a plasmon-loss image obtained with an atomic resolution scanning transmission electron microscope (STEM)-electron energy loss spectroscopy (EELS) method, the detailed analysis is experimentally and theoretically performed. In order to theoretically explain a plasmon-loss image, a dynamical simulation method of the plasmon-loss image combined with a first-principle calculation is firstly proposed. By making comparisons between simulated and experimental plasmon-loss images, we find that the experimental plasmon-loss images closely resemble the high-angle bright-field STEM images, which show the reverse contrast of the corresponding high-angle annular dark-field STEM image., (2010 Elsevier B.V. All rights reserved.)

Published
2010
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18. Effect of convergent beam semiangle on image intensity in HAADF STEM images.

Author

Kuramochi K, Kotaka Y, Yamazaki T, Ohtsuka M, Hashimoto I, and Watanabe K

Abstract

In this study, we experimentally and theoretically show that the intensities of bright spots in a spherical aberration (C(s))-uncorrected high-angle annular dark-field (HAADF) scanning transmission electron microscope (STEM) image of [011]-oriented Co(3)O(4), which has two different numbers of Co atoms in the projected atomic columns, are reversed with increasing sample thickness. However, C(s)-corrected HAADF STEM images produce intensities that correctly depend on the average number of atoms in the projected atomic columns. From an analysis based on the Bloch-wave theorem, it is found that an insufficient semiangle of the incident convergent beam yields intensities that do not depend on the average atomic number in the atomic columns.

Published
2010
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19. Effect of chromatic aberration on atomic-resolved spherical aberration corrected STEM images.

Author

Kuramochi K, Yamazaki T, Kotaka Y, Ohtsuka M, Hashimoto I, and Watanabe K

Abstract

The effect of the chromatic aberration (C(c)) coefficient in a spherical aberration (C(s))- corrected electromagnetic lens on high-resolution high-angle annular dark field (HAADF) scanning transmission electron microscope (STEM) images is explored in detail. A new method for precise determination of the C(c) coefficient is demonstrated, requiring measurement of an atomic-resolution one-frame through-focal HAADF STEM image. This method is robust with respect to instrumental drift, sample thickness, all lens parameters except C(c), and experimental noise. It is also demonstrated that semi-quantitative structural analysis on the nanometer scale can be achieved by comparing experimental C(s)- corrected HAADF STEM images with their corresponding simulated images when the effects of the C(c) coefficient and spatial incoherence are included.

Published
2009
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21. An expanded approach to noise reduction from high-resolution STEM images based on the maximum entropy method.

Author

Nakanishi N, Kotaka Y, and Yamazaki T

Abstract

An expanded use of the maximum entropy method (MEM) is suggested to reduce noise from an experimental high-angle annular dark-field (HAADF) scanning transmission electron microscope (STEM) image. The MEM is combined with an estimate of the standard deviation of noise from an experimental HAADF STEM image and low-pass filtering using the information limit for an incoherent STEM image. Consequently, the present method has just one parameter of a Lagrange multiplier. It is demonstrated that the present method can reduce noise efficiently in high-resolution HAADF STEM images.

Published
2006
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22. Precise measurement of third-order spherical aberration using low-order zone-axis Ronchigrams.

Author

Yamazaki T, Kotaka Y, Kikuchi Y, and Watanabe K

Abstract

A method for the measurement of third-order spherical aberration coefficients (C(s)) is suggested, using low-order zone-axis Ronchigrams of a crystalline material. The validity of the method is confirmed using simulated and experimental Ronchigrams taken with various probe-forming lens configurations. The precision of the measured C(s) value is drastically improved compared with that obtained from the power spectrum-analysis method. In addition, a method for roughly estimating defocus values is presented.

Published
2006
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23. Lattice imaging in low-angle and high-angle bright-field scanning transmission electron microscopy.

Author

Watanabe K, Kikuchi Y, Yamazaki T, Asano E, Nakanishi N, Kotaka Y, Okunishi E, and Hashimoto I

Abstract

Atomic resolution low-angle bright-field (LABF) scanning transmission electron-microscope (STEM) images and high-angle bright-field (HABF) STEM images of [011]-orientated Si have been experimentally obtained together with high-angle annular dark-field (HAADF) STEM images. The contrast formation mechanisms of the LABF STEM and HABF STEM images are examined in comparison with HAADF STEM images. The HABF STEM images independent of defocus and thickness have spatial resolution comparable with HAADF STEM images, and are shown to be given as a simple convolution under the non-dispersion approximation of localized Bloch waves.

Published
2004
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24. Deconvolution processing of HAADF STEM images.

Author

Watanabe K, Kotaka Y, Nakanishi N, Yamazaki T, Hashimoto I, and Shiojiri M

Abstract

A deconvolution processing of high-resolution high-angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) images, combined with maximum entropy method, is applied to two experimental [0 11]-Si images; one having unresolved dumbbells and the other having resolved dumbbells and artificial bright spots. The deconvoluted images for these images show bright spots corresponding to the projected atomic columns and no artificial bright spots. Thus, the deconvolution processing provides almost a real projected atomic structure by eliminating effects of the probe function from HAADF STEM images.

Published
2002
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