摘要
We have carried out photon irradiation study of naphthalene (C10H8), the smallest polycyclic aromatic hydrocarbon (PAH) in water and ammonia ice mixtures. Photons provided by a synchrotron radiation light source in two broad-band energy ranges in the ultraviolet/near extreme ultraviolet (4-20 eV) and the extreme ultraviolet (13-45 eV) ranges were used for the irradiation of H2O+NH3+C10H8 = 1:1:1 ice mixtures at 15K. We could identify several photo-products, namely CH4, C2H6, C3H8, CO, CO2, HNCO, OCN-, and probably quinoline (C9H7N) and phenanthridine (C13H9N). We found that the light hydrocarbons are preferably produced for the ice mixture subjected to 4-20 eV photons. However, the production yields of CO, CO2, and OCN- species seem to be higher for the mixture subjected to EUV photons (13-45 eV). Therefore, naphthalene and its photo-products appear to be more efficiently destroyed when high energy photons (E > 20 eV) are used. This has important consequences on the photochemical evolution of PAHs in astrophysical environments.
原文 | ???core.languages.en_GB??? |
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主出版物標題 | Advances in Geosciences |
主出版物子標題 | Volume 7: Planetary Science (PS) |
發行者 | World Scientific Publishing Co. |
頁面 | 79-91 |
頁數 | 13 |
ISBN(電子) | 9789812708922 |
ISBN(列印) | 981270986X, 9789812709868 |
DOIs | |
出版狀態 | 已出版 - 1 1月 2007 |