Výsledky vyhledávání - "Sohsuke Ohno"

High-precision potassium measurements using laser-induced breakdown spectroscopy under high vacuum conditions for in situ K–Ar dating of planetary surfaces

Autor: Tomokatsu Morota, Yayoi N. Miura, Shunichi Kamata, Noriyuki Namiki, Ko Ishibashi, Takafumi Matsui, Tomoko Arai, Shingo Kameda, Sohsuke Ohno, Seiji Sugita, Yuichiro Cho

Publikováno v: Spectrochimica Acta Part B: Atomic Spectroscopy. 106:28-35

We conducted a series of laser induced breakdown spectroscopy (LIBS) experiments for K measurements under high vacuum conditions (10 - 6 Pa) for the purpose of developing in-situ isochron type K–Ar dating instruments for planetary missions. Unlike

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::512a673eb0733bfcd7b73761935cef23
https://doi.org/10.1016/j.sab.2015.02.002

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Production of sulphate-rich vapour during the Chicxulub impact and implications for ocean acidification

Autor: Takafumi Matsui, Takeshi Watari, Sohsuke Ohno, Kosuke Kurosawa, K. Otani, Toshihiko Kadono, Yoichiro Hironaka, Tatsuhiro Sakaiya, Takayoshi Sano, Seiji Sugita, Taiga Hamura, Keisuke Shigemori

Publikováno v: Nature Geoscience. 7:279-282

Following the Chicxulub impact, many foraminifera in near-surface waters perished, but bottom-dwelling species survived. Impact experiments suggest that sulphate in Chicxulubs target rocks was released as predominantly sulphur trioxide, which would h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::375d8dd67a8499408775140a8973d6a3
https://doi.org/10.1038/ngeo2095

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The nature of shock-induced calcite (CaCO3) devolatilization in an open system investigated using a two-stage light gas gun

Autor: Takafumi Matsui, Sohsuke Ohno, Seiji Sugita, Sunao Hasegawa, Tetsu Mieno, Kosuke Kurosawa

Publikováno v: Earth and Planetary Science Letters. :68-76

The shock-induced decarbonation of non-porous calcite was investigated in an open system over a wide range of peak shock pressures using a two-stage light gas gun and a quadrupole mass spectrometer. We developed a new experimental technique that avoi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2926085be2951bb3d627d3220d23fee4
https://doi.org/10.1016/j.epsl.2012.05.022

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Rotational-Temperature Measurements of Chemically Reacting CN Using Band-Tail Spectra

Autor: Kazuhisa Fujita, Ko Ishibashi, Sohsuke Ohno, Toshihiko Kadono, Kosuke Kurosawa, Seiji Sugita, Takafumi Matsui

Publikováno v: Journal of Thermophysics and Heat Transfer. 23:463-472

The vibrational state of chemically reacting CN radicals does not necessarily have a Boltzmann distribution because it may be influenced by the chemical reaction leading to the formation of the CN radicals. Here, we develop a new method to measure th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7391d9d23df3d9b33b9f28d3ec39196f
https://doi.org/10.2514/1.40037

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Flyer acceleration experiments using high-power laser

Autor: Tomokazu Sano, Sohsuke Ohno, Y. Hironaka, T. Sakaiya, Takeshi Watari, Kazuto Otani, Tadashi Kondo, Akiko M. Nakamura, Masahiko Arakawa, T. Mochiyama, Hideo Nagatomo, T. Fujiwara, Keisuke Shigemori, Shinsuke Fujioka, Kosuke Kurosawa, Takafumi Matsui, Seiji Sugita, Toshihiko Kadono, Hikaru Yabuta

Publikováno v: EPJ Web of Conferences, Vol 59, p 19002 (2013)

Flyer acceleration technique using high-power lasers has several advantages such as the achieved velocities higher than 10 km/s and non-contamination to the products generated by impacts. In this study, we show that a high-power laser can achieve fly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::388e78817f5417ca64015e0b99261895
https://doaj.org/article/becd289580834bd7aaf4f376adab4c48

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