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Behaviour of radicals on interstellar dust analogues

Published online by Cambridge University Press:  12 October 2020

Naoki Watanabe Open the ORCID record for Naoki Watanabe [Opens in a new window]
Naoki Watanabe*
Affiliation:
Institute of Low Temperature Science, Hokkaido University, N19-W8, Kita-ku, Sapporo, 060-0819, Japan email: watanabe@lowtem.hokudai.ac.jp
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Abstract

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Surface reactions of radicals play important roles in the formation of complex molecules on interstellar dust grains. Under interstellar conditions, because the coverage of adsorbates on dust is significantly low, surface reactions are often limited by precedent processes, namely, the adsorption and diffusion of reactants. Therefore, to appropriately incorporate dust surface reactions into chemical models, information on the adsorption and diffusion of radicals is crucial. However, it is not easy to follow the behaviour of radicals on surfaces by conventional experimental methods. To monitor radicals on interstellar dust analogues, we have recently succeeded in applying a combination of photostimulated desorption and resonance-enhanced multiphoton ionization methods. In this paper, we briefly review our recent experiments for clarifying radical behaviour on water ice, pure solid CO and diamond-like carbon.

Keywords

Radicalsdetection methodice
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 116 - 122
Copyright
© International Astronomical Union 2020

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