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Hatanaka, Takaaki,Ohzono, Shinji,Park, Mirae,Sakamoto, Kotaro,Tsukamoto, Shogo,Sugita, Ryohei,Ishitobi, Hiroyuki,Mori, Toshiyuki,Ito, Osamu,Sorajo, Koichi,Sugimura, Kazuhisa,Ham, Sihyun,Ito, Yuji American Society for Biochemistry and Molecular Bi 2012 The Journal of biological chemistry Vol.287 No.51
A three-loop neutrino model with global U(1) symmetry
Hatanaka, H.,Nishiwaki, K.,Okada, H.,Orikasa, Y. North Holland 2015 Nuclear Physics, Section B Vol.894 No.-
We study a three-loop induced neutrino model with a global U(1) symmetry at TeV scale, in which we naturally accommodate a bosonic dark matter candidate. We discuss the allowed regions of masses and quartic couplings for charged scalar bosons as well as the dark matter mass on the analogy of the original Zee-Babu model, and show the difference between them. We also discuss that the possibility of the collider searches in a future like-sign electron liner collider could be promising.
Cathodoluminescence spectroscopic study of the boron-nitrogen co-doping diamond films
Yuko Hatanaka,Sadao Takeuchi,Koji Iwasaki,Hidenori Gamo,Kiyoharu Nakagawa,Toshihiro Ando,Mikka Nishitani-Gamo 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
Co-doping diamond is of scientific and technologically interest because a new electrical and/or optical property is expected to obtain. In this study, we have carried out a simultaneous addition of diborane and nitrogen in the gas phase for the growth of co-doping diamonds by microwave plasma-assisted chemical vapor deposition (MPCVD) method. We measured the cathodoluminescence (CL) spectra of the co-doping diamond films. To investigate the effect of boron-nitrogen co-doping addition on the CL spectra, we compared the CL spectra of boron-nitrogen co-doping diamonds with those of nitrogen-doped diamonds. The results revealed that the addition of boron suppressed the nitrogen incorporation into the CVD diamonds.
Kichiji Hatanaka 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.5
The Research Center for Nuclear Physics (RCNP) cyclotron cascade system has been operated to provide high quality beams for various experiments. In order to increase the physics opportunities, the Azimuthally Varying Field (AVF) cyclotron facility was upgraded as a one-year project in 2004. A flat-topping system and an 18-GHz superconducting Electron Cyclotron Resonance (ECR) ion source wer e introduced to improve the beam's quality and intensity. A new beam line was installed to diagnose the characteristics of the beam to be injected into the ring cyclotron and to bypass the ring cyclotron and directly transport low energy beams from the AVF cyclotron to experimental halls. Development has continued to realize the designed performance of these systems. A design study of a new proton ECR source is ongoing to increase the beam brightness required for production of high-flux white neutrons and ultra-cold neutrons. The Research Center for Nuclear Physics (RCNP) cyclotron cascade system has been operated to provide high quality beams for various experiments. In order to increase the physics opportunities, the Azimuthally Varying Field (AVF) cyclotron facility was upgraded as a one-year project in 2004. A flat-topping system and an 18-GHz superconducting Electron Cyclotron Resonance (ECR) ion source wer e introduced to improve the beam's quality and intensity. A new beam line was installed to diagnose the characteristics of the beam to be injected into the ring cyclotron and to bypass the ring cyclotron and directly transport low energy beams from the AVF cyclotron to experimental halls. Development has continued to realize the designed performance of these systems. A design study of a new proton ECR source is ongoing to increase the beam brightness required for production of high-flux white neutrons and ultra-cold neutrons.