Colloquium
Department of Physics, NCU
From VUV Spectroscopy to Photoprocesses of Interstellar Ices
Speaker
Prof. Chen, Yu-Jung (陳俞融)
Department of Physics, NCU(中央大學物理系)
Date 2018.04.17 (Tue)
Time 14:00-14:30
Place S4-625
In space, ices of simple species can be “cooked” in various ways to produce more complex species. The “cooking” can be driven by cosmic rays and by energetic radiation, in particular VUV/EUV photons and X-rays. My research is mainly base on the design, construction, and scientific use of ultra-high-vacuum chamber equipped with a closed-cycle helium-flow cryostat to simulate astronomical environments, and study the photoprocessing of ice mixtures of astrophysical interest subjected to VUV, EUV and X-ray irradiation at low temperature (15−70 K).
In this talk, I will introduce the impact of introducing VUV spectroscopy into this field, which helps to solve important longstanding problems.