Quantification of bulk elemental composition for C‐type asteroid Ryugu samples with nondestructive elemental analysis using muon beam-Reference-Cited by-同舟云学术

Quantification of bulk elemental composition for C‐type asteroid Ryugu samples with nondestructive elemental analysis using muon beam

Published:2024-01-31 Issue: Volume: Page:
ISSN:1086-9379
Container-title:Meteoritics & Planetary Science
language:en
Short-container-title:Meteorit & Planetary Scien

Author:

Ninomiya Kazuhiko¹^ORCID,Osawa Takahito²,Terada Kentaro³,Wada Taiga⁴,Nagasawa Shunsaku⁵⁶,Chiu I‐Haun¹,Nakamura Tomoki⁴,Takahashi Tadayuki⁶,Miyake Yasuhiro⁷,Kubo M. Kenya⁸,Takeshita Soshi⁷,Taniguchi Akihiro⁹,Umegaki Izumi⁷¹⁰,Watanabe Shin⁶¹¹,Azuma Toshiyuki¹²,Katsuragawa Miho⁶,Minami Takahiro⁵⁶,Mizumoto Kazumi¹³,Shimomura Koichiro⁷,Takeda Shin'ichiro⁶,Morita Tomoyo⁴,Kikuiri Mizuha⁴,Amano Kana⁴^ORCID,Kagawa Eiichi⁴,Furukawa Yoshihiro⁴^ORCID,Yurimoto Hisayoshi¹⁴^ORCID,Noguchi Takaaki¹⁵^ORCID,Okazaki Ryuji¹⁶,Yabuta Hikaru¹⁷,Naraoka Hiroshi¹⁶,Sakamoto Kanako¹⁸,Tachibana Shogo¹⁸¹⁹^ORCID,Yada Toru¹⁸,Nishimura Masahiro¹⁸,Nakato Aiko¹⁸,Miyazaki Akiko¹⁸,Yogata Kasumi¹⁸,Abe Masanao¹⁸,Okada Tatsuaki¹⁸,Usui Tomohiro¹⁸,Yoshikawa Makoto¹⁸,Saiki Takanao¹⁸,Tanaka Satoshi¹⁸,Terui Fuyuto²⁰,Nakazawa Satoru¹⁸,Watanabe Sei‐ichiro²¹,Tsuda Yuichi¹⁸

Affiliation:

1. Institute for Radiation Sciences Osaka University Toyonaka Japan

2. Materials Sciences Research Center Japan Atomic Energy Agency (JAEA) Tokai Japan

3. Graduate School of Science Osaka University Toyonaka Japan

4. Graduate School of Science Tohoku University Sendai Japan

5. Department of Physics The University of Tokyo Kashiwa Japan

6. Kavli Institute for the Physics and Mathematics of the Universe (WPI) The University of Tokyo Kashiwa Japan

7. Institute of Materials Structure Science High Energy Accelerator Research Organization (KEK) Tokai Japan

8. College of Liberal Arts International Christian University Mitaka Japan

9. Institute for Integrated Radiation and Nuclear Science Kyoto University Kumatori Japan

10. Toyota Central Research and Development Laboratories, Inc. Nagakute Japan

11. JAXA Space Exploration Center (JSEC) Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan

12. Atomic, Molecular & Optical Physics Lab., RIKEN Wako Japan

13. Tokyo University of the Arts Tokyo Japan

14. School of Science Hokkaido University Sapporo Japan

15. Graduate School of Science Kyoto University Kyoto Japan

16. Faculty of Science Kyushu University Fukuoka Japan

17. Graduate School of Advanced Science and Engineering Hiroshima University Higashi‐Hiroshima Japan

18. Institute of Space and Astronautical Science (ISAS) Japan Aerospace Exploration Agency (JAXA) Sagamihara Japan

19. Department of Earth and Planetary Science The University of Tokyo Tokyo Japan

20. Kanagawa Institute of Technology Atsugi Japan

21. Graduate School of Environmental Studies Nagoya University Nagoya Japan

Abstract

AbstractSamples from asteroid Ryugu, brought back by asteroid explorer Hayabusa2, are important for investigating the origin and evolution of the solar system. Here, we report the elemental compositions of a 123‐mg Ryugu sample determined with a nondestructive muon elemental analysis method. This method is a powerful tool for determining bulk chemical composition, including light elements such as C, N, and O. From the muonic x‐ray spectra with three carbonaceous chondrites, the relationship between the elemental composition and muonic x‐ray intensity was determined for each element. Calibration curves showed linearity, and the elemental composition of Ryugu was quantitatively determined. The results reflect the average bulk elemental composition of asteroid Ryugu owing to the large amount of samples. Ryugu has an elemental composition similar to that of Orgueil (CI1) and should be classified as CI1. However, the O/Si ratio of Ryugu is 25% lower than that of Orgueil, indicating that Orgueil may have been seriously contaminated by terrestrial materials after its fall to Earth. These results indicate that the Ryugu sample is more representative than the CI chondrites as a solid material of the solar system.

Funder

Japan Society for the Promotion of Science

Publisher

Wiley

Subject

Space and Planetary Science,Geophysics

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1111/maps.14135

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