Assessing the debris generated by the small carry-on impactor operated from the Hayabusa2 mission

HAYABUSA2 PROJECT TEAM

Research output: Contribution to journalArticlepeer-review

Abstract

We have analyzed the carbonaceous materials generated by the explosion of an High-melting explosive mixture in an Ar atmosphere in a laboratory simulation of the small carry-on impactor experiment. We used both non-destructive and destructive analytical techniques to identify the chemical nature of the materials. From SEM-EDS, we found the materials to be composed mainly of carbon, nitrogen, and oxygen, with a detectable amount of metals. Suitable parameters for identifying these materials are a FTIR peak at 1520 cm−1, low reflectance and gentle red slope of FTIR spectrum compared with the Murchison CM2 chondrite, the Raman D and G bands, and the hydrogen, carbon, and nitrogen isotopic compositions and their spatial distributions. The scanning transmission X-ray microscopy (STXM)-XANES results provided information about the molecular nature of these highly aromatic materials, which was supported by results from TD-GC/MS. These results suggest that it is possible to distinguish Ryugu samples from SCI potential contaminants in a sample container by using proper combinations of analytical techniques. This assessment provides information that will be useful for the analysis of the Ryugu asteroidal samples.

Original languageEnglish
Pages (from-to)223-239
Number of pages17
JournalGeochemical Journal
Volume5
Issue number4
DOIs
Publication statusPublished - 2021

Keywords

  • C-type asteroid ryugu
  • Carbonaceous materials
  • Hayabusa2 mission
  • Off-nominal assessment
  • Small carry-on impactor

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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