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Photostimulated Desorption and Ortho-Para Conversion ofH2on Ag Surfaces
Abstract
Photostimulated desorption and change of the ortho-para ratio of H2 physisorbed on Ag at 7 K are reported. After pump laser excitation at 193 nm neutral H2 desorbing in a nonthermal process is state selectively detected by resonance-enhanced multiphoton ionization. At weak pump laser fluence the natural ortho-para conversion of H2 on Ag was monitored to proceed with a conversion time of approximately 780 s, which is in good agreement with predictions based on an electron-exchange-hyperfine-contact model. With increasing pump laser fluence, the ortho-para ratio decreases faster, suggesting photoassisted ortho-para H2 conversion.
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Some materials, such as silver, copper, charcoal, graphite, and supported chromium and ferric oxides, have been found effective for ortho-to para-hydrogen conversion.
“Some materials, such as silver [81][82][83], copper [84,85], charcoal [56], graphite [86], and supported chromium [87,88] and ferric [89,90] oxides, have been found to be effective for this conversion.”
From 5917. https://doi.org/10.3390/en14185917. - (2021) · cites this paper as [83]
Silver, copper, charcoal, graphite, supported chromium oxides, and supported ferric oxides have been found effective for ortho-to-para hydrogen conversion.
“Some materials, such as silver[81][82][83], copper[84,85], charcoal[56], graphite[86], and supported chromium[87,88] and ferric[89,90] oxides, have been found to be effective for this conversion.”
From 5917. https://doi.org/10.3390/en14185917. - (2021) · cites this paper as [83]
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(2021) · doi:10.3390/en14185917 · Cited by 708
Metadata
- Authors
- Fukutani, K., Yoshida, K., Wilde, M., Diño, W. A., Matsumoto, M., & Okano, T.
- Affiliations
- Institute of Industrial Science, The University of Tokyo (JP)
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2003-03-06
- Volume
- 90
- Issue
- 9
- Pages
- 096103-096103
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W1971001552
- Cited by
- 44
- References
- 0
- Citations by year
- 2025: 2 · 2022: 1 · 2021: 4 · 2020: 2 · 2019: 1 · 2018: 4 · 2017: 1 · 2016: 4 · 2015: 1 · 2014: 2 · 2013: 3 · 2012: 1
- FWCI
- 0.63
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Physical Review Letters (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Quantum, superfluid, helium dynamics
- Physical Sciences › Chemistry › Physical and Theoretical Chemistry › Surface Chemistry and Catalysis
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Laser-Matter Interactions and Applications
- Keywords
- ortho-para conversion, hydrogen adsorption, silver surface, state-selective detection, resonance-enhanced multiphoton ionization, low-temperature adsorption
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