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Takaaki Kajita (梶田 隆章 , Kajita Takaaki , Japanese pronunciation: [kadʑita takaːki] ; born 9 March 1959) is a Japanese physicist , known for neutrino experiments at the Kamioka Observatory – Kamiokande and its successor, Super-Kamiokande . In 2015, he was awarded the Nobel Prize in Physics jointly with Canadian physicist Arthur B. McDonald . On 1 October 2020, he became the president of the Science Council of Japan .
Early life and education [ edit ]
Kajita was born in 1959 in Higashimatsuyama, Saitama , Japan.[1] He liked studying thought rather than memorizing, especially with interest in physics , biology , world history , Japanese history , and earth science in high school. He studied physics at Saitama University and graduated in 1981. He received his doctorate in 1986 at the University of Tokyo .[2] At the University of Tokyo, he joined Masatoshi Koshiba 's research group because neutrinos "seemed like they might be interesting."
Career and research [ edit ]
Since 1988, Kajita has been at the Institute for Cosmic Radiation Research, University of Tokyo, where he became an assistant professor in 1992 and professor in 1999.[3]
He became director of the Center for Cosmic Neutrinos at the Institute for Cosmic Ray Research (ICRR) in 1999. As of 2017[update] , he is a Principal Investigator at the Institute for the Physics and Mathematics of the Universe in Tokyo, and Director of ICRR.[4]
In 1998, Kajita's team at the Super-Kamiokande found that when cosmic rays hit the Earth's atmosphere, the resulting neutrinos switched between two flavours before they reached the detector under Mt. Kamioka.[2] [5] This discovery helped prove the existence of neutrino oscillation and that neutrinos have mass. In 2015, Kajita shared the Nobel Prize in Physics with Canadian physicist Arthur McDonald , whose Sudbury Neutrino Observatory discovered similar results.[5] Kajita's and McDonald's work solved the longstanding Solar neutrino problem , which was a major discrepancy between the predicted and measured Solar neutrino fluxes, and indicated that the Standard Model , which required neutrinos to be massless, had weaknesses.[5] In a news conference at the University of Tokyo, shortly after the Nobel announcement, Kajita said, "I want to thank the neutrinos, of course. And since neutrinos are created by cosmic rays, I want to thank them, too."[6]
One of the first people Kajita called after receiving the Nobel Prize was 2002 Nobel physics laureate Masatoshi Koshiba , his former mentor and a fellow neutrino researcher.[2]
Kajita is currently the principal investigator of another ICRR project located at the Kamioka Observatory , the KAGRA gravitational wave detector.[7]
Recognition [ edit ]
Kajita at a press conference at the Royal Swedish Academy of Sciences , 2015
2015 – Order of Culture , Person of Cultural Merit
2016 – Doctorate in Science (DSc) , Aligarh Muslim University , India [19]
2016 – Honoris Causa Degree in Physics, University of Padua [20]
2016 – Honoris Causa Degree , Higher University of San Andrés , La Paz, Bolivia.[21]
2017 – Honoris Causa Degree in Physics, University of Naples Federico II [22]
2017 – Honoris Causa Degree in Physics, University of Bern [23]
2017 – Honoris Causa Degree in Physics, University of Perugia [24]
See also [ edit ]
References [ edit ]
^ a b c "Japan's Takaaki Kajita shares Nobel in physics" . Japan Times . 6 October 2015. Retrieved 7 October 2015 .
^ "2015 Nobel Prize in Physics: Canadian Arthur B. McDonald shares win with Japan's Takaaki Kajita" . CBC News . 6 October 2015. Retrieved 6 October 2015 .
^ "About ICRR" . Institute for Cosmic Ray Research, University of Tokyo.
^ a b c Randerson, James and Ian Sample (6 October 2015). "Kajita and McDonald win Nobel physics prize for work on neutrinos" . The Guardian . Retrieved 6 October 2015 .
^ Overbye, Dennis (6 October 2015). "Takaaki Kajita and Arthur McDonald Share Nobel in Physics for Work on Neutrinos" . New York Times . Retrieved 6 October 2015 .
^ "Professor Kajita won the novel prize in physics !!" (Press release). KAGRA collaboration. 7 October 2015. Professor Kajita, who is the PI of KAGRA, won the Nobel prize in physics !!
^ "Recipients of the Asahi Prize" . Asahi Shimbun . Retrieved 12 August 2016 .
^ "HEAD AAS Rossi Prize Winners" . Home High Energy Astrophysics Division. Retrieved 12 August 2016 .
^ "Recipients of the Asahi Prize" . Asahi Shimbun . Retrieved 12 August 2016 .
^ "Recipients of Nishina Memorial Prizes" . Nishina Memorial Foundation . Retrieved 12 August 2016 .
^ "2002 W.K.H. Panofsky Prize in Experimental Particle Physics Recipient" . American Physical Society . Retrieved 12 August 2016 .
^ "第1 回「戸塚洋二賞」選考結果" . Heisei Foundation for Basic Science. 24 February 2012. Archived from the original on 6 March 2016. Retrieved 17 November 2015 .(in Japanese)
^ "The Imperial Prize, Japan Academy Prize, Duke of Edinburgh Prize Recipients" . Japan Academy . 4 June 2012. Retrieved 12 August 2016 .
^ "Japan Academy Prize to – Takaaki Kajita" (PDF) . Japan Academy . 4 June 2012. Retrieved 12 August 2016 .
^ "Julius Wess Award to Takaaki Kajita" . Kavli Institute for the Physics and Mathematics of the Universe . 27 November 2013. Retrieved 17 November 2015 .
^ "The Nobel Prize in Physics 2015". . Nobelprize.org. Nobel Media AB 2014. Web. 6 October 2015.
^ "Breakthrough Prize Awarded $22 Million In Science Prizes" (Press release). San Francisco: Fundamental Physics Prize. 8 November 2015.
^ Azeem, Ahmad (November 2016). "Nobel Laureate Takaaki Kajita conferred DSc at AMU's 64th convocation" . India Today . Retrieved 1 November 2016 .
^ "Padova University, laurea honors causa al Premio Nobel Takaaki Kajita" . 9 September 2016. Retrieved 13 March 2024 .
^ "Kajita: Emociones de la ciencia esperan a los jóvenes bolivianos" . Página Siete. 3 May 2016. Retrieved 10 October 2019 .
^ "Federico II, laurea honors causa al Premio Nobel Takaaki Kajita" . Il Mattino. 30 January 2017. Retrieved 10 October 2019 .
^ "Honors" . University of Bern. 2017. Archived from the original on 8 January 2018. Retrieved 10 October 2019 .
^ "Laurea Honoris Causa a Takaaki Kajita" . University of Perugia. 2017. Retrieved 4 October 2021 .
External links [ edit ]
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