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| On the encounter desorption of hydrogen atoms on an ice mantle | |
Chang, Qiang1 ; Zheng, Xu-Li2; Zhang, Xia2; Quan, Dong-Hui2,3; Lu, Yang4; Meng, Qing-Kuan1; Li, Xiao-Hu2; Chen, Long-Fei2
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| 2021-03-01 | |
| Source Publication | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| ISSN | 1674-4527 |
| Volume | 21Issue:2Pages:39 |
| Contribution Rank | 1 |
| Abstract | 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. |
| Keyword | astrochemistry ISM abundances ISM molecules |
| DOI | 10.1088/1674-4527/21/2/39 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[11673054] ; National Natural Science Foundation of China[11973075] ; National Natural Science Foundation of China[11973099] |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000631499300001 |
| Publisher | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| Funding Organization | National Natural Science Foundation of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/3962 |
| Collection | 射电天文研究室_天体化学研究团组 |
| Corresponding Author | Chang, Qiang |
| Affiliation | 1.Shandong Univ Technol, Sch Phys & Optoeletron Engn, Zibo 255000, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 3.Eastern Kentucky Univ, Dept Chem, Richmond, KY 40475 USA 4.Sun Yat Sen Univ, Sch Phys & Astron, Zhuhai 519082, Peoples R China |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Chang-2021-On the en（517KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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