Penetration depth of 1 keV electrons in CO:H₂O ice mixture

Jr-Yao Lee^1*, Chun-Yi Lee¹, Chao-Hui Huang¹, Ni-En Sie¹, Yu-Jung Chen¹

¹Department of Physics, National Central University, Taoyuan City, Taiwan

* Presenter:Jr-Yao Lee, email:csjacker0617@gmail.com

The monte CArlo SImulation of electroN trajectory in sOlids (CASINO) is widely used in solid-state physics to assist planning and interpreting in scanning electron microscope field. In astrophysics, CASINO is used to estimate the penetration depth of electrons in ices but has not been examined experimentally. In this study, the isotope substituted double layer ice of CO:H₂O ice mixture with a ratio of 1:4 is performed to reveal the penetration depth of 1 keV electrons. The production of ¹³CO₂ is used as a tracer to monitor the location of water dissociation events caused by electrons. The comparison between CASINO and experimental results will be presented.

Keywords: amorphous solid water, carbon monoxide, electron, CASINO