标题： X射线诱导的二氧化碳冰解吸和光化学反应 显示英文标题

标题： X-ray induced desorption and photochemistry in CO ice

摘要： 我们报告了X射线诱导的中性分子、阳离子和阴离子从CO冰中的脱附研究。 中性CO的脱附，迄今为止最为丰富，其脱附量在天体化学应用的背景下进行了量化和讨论。 观察到了许多不同的阳离子的脱附，包括直到质谱仪质量上限的大阳离子。 相比之下，检测到的唯一脱附的阴离子是O$^-$和C$^-$。 在光脱附光谱的帮助下，讨论了所有这些物质的脱附机制。 X射线吸收光谱的演变显示了辐射后冰的显著化学变化，这与大阳离子的脱附一起，为CO冰中的X射线诱导光化学提供了新的见解。 显示英文摘要

摘要： We report an investigation of X-ray induced desorption of neutrals, cations and anions from CO ice. The desorption of neutral CO, by far the most abundant, is quantified and discussed within the context of its application to astrochemistry. The desorption of many different cations, including large cations up to the mass limit of the spectrometer, are observed. In contrast, the only desorbing anions detected are O$^-$ and C$^-$. The desorption mechanisms of all these species are discussed with the aid of their photodesorption spectrum. The evolution of the X-ray absorption spectrum shows significant chemical modifications of the ice upon irradiation, which along with the desorption of large cations gives a new insight into X-ray induced photochemistry in CO ice.