| タイトル |
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en
An Experimental Study of Chemical Desorption for Phosphine in Interstellar Ice
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| 作成者 |
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| アクセス権 |
metadata only access |
| 権利情報 |
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| 主題 |
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Other
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Dense interstellar clouds
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Other
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Interstellar dust processes
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Other
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Astrochemistry
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Other
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Pre-biotic astrochemistry
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NDC
440
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| 内容注記 |
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Abstract
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Phosphine (PH3), an important molecule for the chemistry of phosphorus (P)-bearing species in the interstellar medium (ISM) is considered to form primarily on interstellar grains. However, no report exists on the processes of PH(3)formation on grains. Here, we experimentally studied the reactions of hydrogen (H) atoms and PH(3)molecules on compact amorphous solid water, with a particular focus on the chemical desorption of PH(3)at 10-30 K. After exposure to H atoms for 120 minutes, up to 50% of solid PH(3)was lost from the icy surface. On the basis of experiments using deuterium atoms, it was concluded that the loss of PH(3)resulted from chemical desorption through the reactions PH3+ H -> PH2 + H(2)and/or PH2+ H -> PH3. The effective desorption cross-section was similar to 5 x 10(-17)cm(2), which is three times larger than that of hydrogen sulfide measured under similar experimental conditions. The present results suggest that the formation of PH3, and possibly PH(2)and PH, followed by their desorption from icy grains, may contribute to the formation of PN and PO in the gas phase, and thus may play a role in the P chemistry of the ISM.
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| 出版者 |
en
IOP Publishing
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
NA |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/79283
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| 関連 |
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isIdenticalTo
DOI
https://doi.org/10.3847/2041-8213/aba695
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| 収録誌情報 |
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en
Astrophysical journal letters
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巻898
号2
開始ページL52
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| コンテンツ更新日時 |
2023-07-26 |
