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Infrared Spectra and Radiation Stability of H_2O_2 Ices Relevant to Europa

机译:与欧罗巴有关的H_2O_2冰的红外光谱和辐射稳定性

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摘要

In this paper we present spectra of H_2O_2-corttaining ices in the near- and mid-infrared (IR) regions. Spectral changes on warming are shown, as is a comparison of near-IR bands of H_2O and H_2O_2-containing ices. An estimate of the A-value (absolute intensity) for the largest near-IR feature of H_2O_2 is given. Radiation-decay half-lives are reported for 19 K and 80 K, and are related to the surface radiation doses on Europa. The radiation data show that H_2O_2 destruction is slower at 80 K than 19 K, and are consistent with the claim that icy material in the outermost micrometer of Europa's surface has been heavily processed by radiation.
机译:在本文中,我们介绍了近红外和中红外(IR)区域中含H_2O_2的冰的光谱。显示了变暖时的光谱变化,以及含H_2O和H_2O_2的冰的近红外波段的比较。给出了H_2O_2最大近红外特征的A值(绝对强度)的估计。据报道辐射衰减半衰期为19 K和80 K,并且与欧罗巴上的表面辐射剂量有关。辐射数据表明,在80 K时,H_2O_2的破坏要比19 K慢,这与欧罗巴表面最外层微米的冰状材料已受到辐射严重处理的说法是一致的。

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