Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Naoki NAGAKURA"'
Autor:
Kenji Mishima, Hirochika Sumino, Takahito Yamada, Sei Ieki, Naoki Nagakura, Hidetoshi Otono, Hideyuki Oide
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 19, Iss 10, Pp 3995-4005 (2018)
Abstract The helium standard of Japan, referred to as HESJ, is an interlaboratory standard for the 3He/4He ratio. While the ratio of 3He and 4He of the HESJ was previously determined by a relative comparison to atmospheric helium, the absolute value
Externí odkaz:
https://doaj.org/article/e19aac9ea4cc4db396653852cb3ceb1a
Autor:
Takanori Mogi, Takuro Hasegawa, Katsuya Hirota, Go Ichikawa, Sei Ieki, Takashi Ino, Yoshihisa Iwashita, Shogo Kajiwara, Yu Kato, Masaaki Kitaguchi, Ryunosuke Kitahara, Jun Koga, So Makise, Shun Matsuzaki, Kenji Mishima, Koki Morikawa, Naoki NAGAKURA, Hiroki Okabe, Hidetoshi Otono, Yoshichika Seki, Daiichiro Sekiba, Tatsushi Shima, Haruki Shimizu, Hirohiko M. Shimizu, Yuki Sugisawa, Naoyuki Sumi, Hirochika Sumino, Tomohiko Tanabe, Tatsuhiko TOMITA, Hideaki Uehara, Takahito Yamada, Satoru Yamashita, Kodai Yano, Tamaki Yoshioka
Publikováno v:
Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c73de8ab91c29e16c00952c3b946347d
https://doi.org/10.22323/1.380.0458
https://doi.org/10.22323/1.380.0458
Autor:
Masaaki Kitaguchi, Y. Seki, Naoyuki Sumi, Tatsuhiro Yamada, K. Yano, H. Okabe, Yoshihisa Iwashita, T. Tomita, Ryunosuke Kitahara, Hideyuki Oide, A. Morishita, Hidetoshi Otono, Tamaki Yoshioka, Katsuya Hirota, T. Mogi, H. Uehara, Hirohiko M. Shimizu, T. Shima, S. Ieki, Kenji Mishima, M. Yokohashi, Hirochika Sumino, Go Ichikawa, Jun Koga, Daiichiro Sekiba, Takashi Ino, Satoru Yamashita, Naoki Nagakura, K. Morikawa
Publikováno v:
Progress of Theoretical and Experimental Physics
The neutron lifetime has been measured by comparing the decay rate with the reaction rate of $^3$He nuclei of a pulsed neutron beam from the spallation neutron source at the Japan Proton Accelerator Research Complex (J-PARC). The decay rate and the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68fc01346390b63e6881096bd5646ee7
http://hdl.handle.net/2433/260949
http://hdl.handle.net/2433/260949
Autor:
T. Tomita, A. Kimura, Kenji Mishima, S. Ieki, Shinji Takada, Naoyuki Sumi, Takuya Okudaira, Jun Koga, Tamaki Yoshioka, Hirohiko M. Shimizu, Naoki Nagakura, Hidetoshi Otono, Ryunosuke Kitahara, Masaaki Kitaguchi, Tatsuhiro Yamada
A neutron lifetime measurement conducted at the Japan Proton Accelerator Research Complex (J-PARC) is counting the number of electrons from neutron decays with a time projection chamber (TPC). The $\gamma$ rays produced in the TPC cause irreducible b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4842385fd48b43b4bf86fc9f912fae9c
http://arxiv.org/abs/2007.15302
http://arxiv.org/abs/2007.15302
Autor:
Shinji Yamashita, Masaaki Kitaguchi, Ryunosuke Kitahara, A. Morishita, Tatsushi Shima, Yoshichika Seki, T. Tomita, Hirohiko M. Shimizu, Kenji Mishima, Naoki Nagakura, Jun Koga, M. Yokohashi, Hirochika Sumino, Hideyuki Oide, Yoshihisa Iwashita, Tatsuhiro Yamada, Tamaki Yoshioka, Naoyuki Sumi, Takashi Ino, Kaoru Taketani, S. Ieki, Katsuya Hirota, Daiichiro Sekiba, Hidetoshi Otono
Publikováno v:
Progress of Theoretical and Experimental Physics. 2019
In a neutron lifetime measurement at the Japan Proton Accelerator Complex, the neutron lifetime is calculated from the neutron decay rate and the incident neutron flux. The flux is obtained by counting the protons emitted from the neutron absorption
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfb15ed71f41e3a8491e89201e6b2c46
https://doi.org/10.1093/ptep/ptz096
https://doi.org/10.1093/ptep/ptz096
Autor:
Hideaki Uehara, Tamaki Yoshioka, Yoshihisa Iwashita, Takashi Ino, Hirochika Sumino, Daiichiro Sekiba, T. Tomita, Kaoru Taketani, Hideyuki Oide, Hirohiko M. Shimizu, Yusuke Nakano, Satoru Yamashita, Yoshichika Seki, Naoki Nagakura, Hidetoshi Otono, Jun Koga, Naoyuki Sumi, Takahito Yamada, Katsuya Hirota, Masaaki Kitaguchi, M. Yokohashi, Ryunosuke Kitahara, A. Morishita, S. Ieki, Hiroki Okabe, Tatsushi Shima, Kenji Mishima
Publikováno v:
EPJ Web of Conferences, Vol 219, p 03003 (2019)
The decay lifetime of free neutrons (∼880 s) is an important parameter of the weak interaction and for Big Bang Nucleosynthesis. However, results of measurements currently show discrepancies depending on the method used. As most experiments nowaday
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1afeafec444e9fb20c51edfe6dca648f
https://www.epj-conferences.org/articles/epjconf/pdf/2019/24/epjconf-ppns2019_03003.pdf
https://www.epj-conferences.org/articles/epjconf/pdf/2019/24/epjconf-ppns2019_03003.pdf
Autor:
Naoki Nagakura, Yumi Watahiki, Isao Harayama, Kazuki Fujii, Yu Kato, Satoru Yamashita, Daiichiro Sekiba
Publikováno v:
Progress of Theoretical and Experimental Physics. 2018
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39307464e0bfc47aaab1222d0dc74336
https://doi.org/10.1093/ptep/ptx178
https://doi.org/10.1093/ptep/ptx178
Autor:
Satoru Yamashita, Yasushi Arimoto, Tamaki Yoshioka, Naoyuki Sumi, Naoki Nagakura, Harumichi Yokoyama, Ryo Katayama, Genki Tanaka, Tomoaki Sugino, Hirohiko M. Shimizu, T. Tomita, Nao Higashi, Tatsuhiro Yamada, Hideyuki Oide, Momoko Tanaka, K. Tauchi, Yoshihisa Iwashita, Hirochika Sumino, Akihisa Toyoda, K. Taketani, Y. Igarashi, Kenji Mishima, Hiroshi Matsumura, Takashi Ino, Hidetoshi Otono, Tatsushi Shima, Ryunosuke Kitahara, Risa Sakakibara, Masaaki Kitaguchi
Publikováno v:
Nuclear Instruments & Methods in Physics Research. Section A. 799:187-196
A new time projection chamber (TPC) was developed for neutron lifetime measurement using a pulsed cold neutron spallation source at the Japan Proton Accelerator Research Complex (J-PARC). Managing considerable background events from natural sources a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b65d9ec4d57ec8a2518468e44072e75a
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100795036
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100795036
Autor:
Christopher C. Haddock, T. Tomita, Naotaka Naganawa, T. Shima, S. Imajo, Tamaki Yoshioka, Hirohiko M. Shimizu, Hidetoshi Otono, S. Awano, M. Yokohashi, M. Hirose, Naoyuki Sumi, Masahiro Hino, Takahito Yamada, Yasuhiro Fuwa, Jun Koga, Noriko Oi, Satoru Yamashita, S. Tasaki, Yoshichika Seki, Naoki Nagakura, A. Umemoto, S. Ieki, Kaoru Taketani, Hirochika Sumino, Katsuya Hirota, Kenji Mishima, Takashi Ino, S. Tada, Hiroaki Kawahara, Ryo Katayama, Daiichiro Sekiba, Fumiya Goto, Y. Iwashita, Masaaki Kitaguchi, Ryunosuke Kitahara, A. Morishita, W. M. Snow, Tomofumi Nagae, Hideyuki Oide
"Neutron Optics and Physics (NOP/ BL05)" at MLF in J-PARC is a beamline for studies of fundamental physics. The beamline is divided into three branches so that different experiments can be performed in parallel. These beam branches are being used to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f9b08af5ce05e1e004542ab52a5c4d08
http://arxiv.org/abs/1712.06351
http://arxiv.org/abs/1712.06351
Autor:
A. Morishita, Risa Sakakibara, Masaaki Kitaguchi, T. Tomita, Hidetoshi Otono, Mami Yokohashi, Tatsushi Shima, Naoyuki Sumi, Hirohiko M. Shimizu, Tomoaki Sugino, S. Ieki, Yoshihisa Iwashita, Takashi Ino, Kaoru Taketani, Satoru Yamashita, Katsuya Hirota, Tamaki Yoshioka, Kenji Mishima, Naoki Nagakura, Hirochika Sumino, Hideyuki Oide, Yoshichika Seki, Takahito Yamada, Genki Tanaka, Ryunosuke Kitahara
Publikováno v:
Scopus-Elsevier
The neutron lifetime is one of the basic parameters in the weak interaction, and is used for predicting the light element abundance in the early universe. Our group developed a new setup to measure the lifetime with the goal precision of 0.1% at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0984e7f1e02453206073d787e496c9b6
https://doi.org/10.22323/1.281.0191
https://doi.org/10.22323/1.281.0191