A5041680877- Planetary Science and Exploration
- Radioactive contamination and transfer
- Geological and Geochemical Analysis
- Advanced Chemical Physics Studies
- Nuclear Physics and Applications
- nanoparticles nucleation surface interactions
- Quantum Mechanics and Applications
- Astro and Planetary Science
- Graphite, nuclear technology, radiation studies
The University of Tokyo
2022-2024
The Hayabusa2 spacecraft explored C-type near-Earth asteroid (162173) Ryugu and returned asteroidal materials, collected during two touchdown operations, to the Earth as first sample from carbonaceous-type asteroid. container, in which ~5 g of was enclosed, safely opened clean chamber system with no severe exposure terrestrial atmosphere. In course preparation operation dark-colored millimeter- sub-millimeter-sized particles were found outside sealing part container. Because they look...
Non-transition metal oxides, including major minerals of the early Solar System, are known to evaporate decomposing into multiple gas molecules, while maintaining their stoichiometric compositions (dissociative congruent evaporation). Here, we derived absolute rate this type evaporation using transition state theory. In our modified theory, activation energy closely corresponds average molecules at state, reflecting degree decomposition potential barrier along reaction coordinate...