红外自由电子激光诱导的二氧化碳和从冷温度的固体无形水中的光分解
Kerry H Jones1, Jack E Fulker2, Domantas Laurinavicius3
1Department of Chemistry, University of Sussex, Falmer, Brighton, BN1 9QJ, UK. w.a.brown@sussex.ac.uk.
Physical chemistry chemical physics : PCCP
|March 16, 2026
概括
红外 (IR) 光子可以诱导分子从太空中的冰中脱离,这一过程对天体物理模型至关重要. 这项研究表明,来自水冰的二氧化碳和二氧化的IR光电吸收是显著的,应该纳入模型.
科学领域:
- 天体化学是天体化学.
- 量子化学 是一个量子化学.
- 固态物理 固态物理
背景情况:
- 天体物理模型经常忽视分子冰中的红外 (IR) 光处理,主要关注紫外 (UV) 光处理.
- 在各种天体物理环境中,红外光子的流量可以与紫外线流量相当或超过,这表明红外光处理可能很重要.
研究的目的:
- 在天体物理条件下研究来自混合H2O冰的IR诱导CO和N2光电吸收的重要性.
- 确定是否应该将红外光处理,特别是脱附,纳入天体物理模型.
主要方法:
- 在FELIX自由电子激光装置进行了实验,在9K的温度下对CO:H2O和N2:H2O混合冰进行辐射,并使用中红外辐射 (2.9-12μm).
- 使用质谱法监测光子诱导脱吸 (PID).
- 研究了辐射功率的依赖性,以了解溶解机制.
主要成果:
- 只有当冰被辐射到与H2O的振动模式相应的波长时,才观察到红外诱导的CO和N2脱落.
- 在激发兴奋剂分子的振动模式时,没有发生脱落.
- 脱动力学遵循双指数衰变,表明快速和缓慢的过程,归因于直接和间接的共振光吸收.
结论:
- 在天体物理条件下,从水冰中吸收二氧化碳和二氧化的红外驱动光电吸收是一个重要的过程.
- 这些发现需要将红外光电吸收纳入天体物理模型,以准确地表示分子冰处理.
- 观察到的光电吸收的复杂,基质介导性质突出了需要进一步调查的需要.
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