On the encounter desorption of hydrogen atoms on an ice mantle

doi:10.1088/1674-4527/21/2/39

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	On the encounter desorption of hydrogen atoms on an ice mantle
	Chang, Qiang 2; Zheng, Xu-Li 3; Zhang, Xia 3; Quan, Dong-Hui 3,4; Lu, Yang 1; Meng, Qing-Kuan 2; Li, Xiao-Hu 3; Chen, Long-Fei 3
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2021-03-01
卷号	21 期号:2 页码:39
关键词	astrochemistry ISM abundances ISM molecules
ISSN号	1674-4527
DOI	10.1088/1674-4527/21/2/39
产权排序	1
英文摘要	At low temperatures (similar to 10 K), hydrogen atoms can diffuse quickly on grain ice mantles and frequently encounter hydrogen molecules, which cover a notable fraction of grain surface. The desorption energy of H atoms on H-2 substrates is much less than that on water ice. The H atom encounter desorption mechanism is adopted to study the enhanced desorption of H atoms on H-2 substrates. Using a small reaction network, we show that the steady-state surface H abundances predicted by the rate equation model that includes H atom encounter desorption agree reasonably well with the results from the more rigorous microscopic Monte Carlo method. For a full gas-grain model, H atom encounter desorption can reduce surface H abundances. Therefore, if a model adopts the encounter desorption of H atoms, it becomes more difficult for hydrogenation products such as methanol to form, but it is easier for C, O and N atoms to bond with each other on grain surfaces.
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资助项目	National Natural Science Foundation of China[11673054] ; National Natural Science Foundation of China[11973075] ; National Natural Science Foundation of China[11973099]
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
WOS记录号	WOS:000631499300001
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.xao.ac.cn/handle/45760611-7/3961]
专题	天体化学研究团组
通讯作者	Chang, Qiang
作者单位	1.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China 2.Shandong Univ Technol, Sch Phys & Optoeletron Engn, Zibo 255000, Peoples R China 3.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 4.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA
推荐引用方式 GB/T 7714	Chang, Qiang,Zheng, Xu-Li,Zhang, Xia,et al. On the encounter desorption of hydrogen atoms on an ice mantle[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2021,21(2):39.
APA	Chang, Qiang.,Zheng, Xu-Li.,Zhang, Xia.,Quan, Dong-Hui.,Lu, Yang.,...&Chen, Long-Fei.(2021).On the encounter desorption of hydrogen atoms on an ice mantle.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,21(2),39.
MLA	Chang, Qiang,et al."On the encounter desorption of hydrogen atoms on an ice mantle".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 21.2(2021):39.