2024-03-28T16:51:44Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/873672022-12-01T17:12:39Zhdl_2115_20056hdl_2115_147UV-ray irradiation never causes amorphization of crystalline CO2: A transmission electron microscopy studyMasashi, Tsuge1000040846599Thanh, NguyenYasuhiro, ObaHama, Tetsuya1000060161866Kouchi, Akira1000050271531Watanabe, Naokiopen access© 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 InternationalAstrochemistryCosmic iceTransmission electron microscopyInfrared spectroscopy440The Crystallinity of ices, amorphous and crystalline, can be altered not only by heat but also by irradiation of UV-rays or charged particles. In this work, the effect of UV-irradiation on the crystallinity of CO2 ice was investigated by using a transmission electron microscope. A crystalline CO2 ice was produced by annealing amorphous CO2 ice. We found that UV-ray irradiation of CO2 crystals at approximately 10 K does not cause amorphization in contrast to the reported amorphization of crystalline water ice below 70 K. We discuss the difference based on the expected UV photochemistry of CO2 ice.Elsevier2020-09-14engjournal articleAMhttp://hdl.handle.net/2115/87367https://doi.org/10.1016/j.cplett.2020.1379990009-2614Chemical Physics Letters760137999https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/87367/1/Manuscript_CPL_rev.pdfapplication/pdf957.76 KB2020-09-14