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- Tachibana Takayuki
- 東京理科大学理学部第二部
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- Nagashima Yasuyuki
- 東京理科大学理学部第二部
Bibliographic Information
- Other Title
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- 陽電子–電子対消滅による固体表面からのイオン脱離
- ヨウデンシ-デンシ ツイショウメツ ニ ヨル コタイ ヒョウメン カラ ノ イオン ダツリ
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Abstract
<p>We compared positron and electron-stimulated desorption (e+SD and ESD) of positive ions from a TiO2(110) surface. Although desorption of O+ ions was observed in both experiments, the yield of e+SD was one order of magnitude higher than the yield of ESD at an incident energy of 500 eV. Furthermore, e+SD of O+ ions caused even below the ESD threshold and remained highly efficient with incident positron energies between 10 eV and 600 eV. The results indicate that e+SD of O+ ions is predominantly caused by pair annihilation of surface-trapped positrons with inner-shell electrons. We also observed the ion desorption from water chemisorbed on the TiO2 surface and found that the desorption of specific ions was enhanced in e+SD. This finding corroborates our conclusion that annihilation-site selectivity of positrons results in site-selective ion desorption.</p>
Journal
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- Butsuri
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Butsuri 76 (11), 723-728, 2021-11-05
The Physical Society of Japan
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Details 詳細情報について
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- CRID
- 1390008476163514112
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- NII Article ID
- 130008113821
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- NII Book ID
- AN00196952
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- ISSN
- 24238872
- 00290181
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- NDL BIB ID
- 031785703
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed