Journal of Chemical Physics

, volume 128 , issue 21 , pages 214511

Hydrogen atoms in solid xenon: Trapping site structure, distribution, and stability as revealed by EPR studies in monoisotopic and isotopically enriched xenon matrices

Vladimir I Feldman ¹

Fedor F Sukhov ¹

Aleksei Yu Orlov ²

Hide authors affiliations Show authors affiliations: 2 affiliations

Moscow State University 1 Department of Chemistry, , Moscow 119991, Russia |

Institute of Synthetic Polymeric Materials of RAS 2 , 70 Profsoyuznaya Street, Moscow 117393, Russia |

Publication type: Journal Article

Publication date: 2008-06-05

AIP Publishing

Journal of Chemical Physics

scimago Q1

wos Q2

SJR: 0.819

CiteScore: 5.3

Impact factor: 3.1

ISSN: 00219606, 10897690

DOI: 10.1063/1.2933366

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PubMed ID: 18537437

Physical and Theoretical Chemistry

General Physics and Astronomy

Abstract

Trapping and decay of hydrogen atoms generated by fast electron irradiation of solid xenon doped with small hydrogen-containing molecules (acetylene, water) were studied by EPR using monoisotopic (136)Xe matrix (I = 0) and highly isotopically enriched (129)Xe matrix (I = 12). It was found that more than 99% of H atoms observed by EPR are initially trapped in the octahedral interstitial trapping sites, whereas initial population of the substitutional trapping sites is very small (less than 1%). The (129)Xe hyperfine coupling tensor parameters for major trapping site were determined from direct measurements in a (136)Xe matrix doped with small amount of (129)Xe: A(0) ((129)Xe) = -92.1 MHz and B((129)Xe) = -22 MHz. Final proof for the trapping site structure was obtained from comparison between experiment and simulation for the highly enriched (129)Xe matrix. The mean interspin distance of approximately 4 nm was estimated from the EPR signal linewidth in a (136)Xe matrix, the hydrogen atom loss upon irradiation being negligible at low doses. Decay of trapped H atoms occurring at 38-45 K leads to population (or creation) of metastable traps of lower symmetry.

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3 citations

Tyurin Daniil

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PhD in Chemistry

72 publications, 683 citations

h-index: 15

Lomonosov Moscow State University

Computational chemistry

Computational methods in chemistry

Cryogenic technology

EPR spectroscopy

High-performance computing

IR spectroscopy

Interaction of X-ray and synchrotron radiation with matter

Matrix isolation

Molecular modeling

Molecular spectroscopy

Non-covalent Interactions

Non-valent interactions

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Feldman V. I., Sukhov F. F., Orlov A. Yu. Hydrogen atoms in solid xenon: Trapping site structure, distribution, and stability as revealed by EPR studies in monoisotopic and isotopically enriched xenon matrices // Journal of Chemical Physics. 2008. Vol. 128. No. 21. p. 214511.

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TY - JOUR

DO - 10.1063/1.2933366

UR - https://pubs.aip.org/jcp/article/128/21/214511/959108/Hydrogen-atoms-in-solid-xenon-Trapping-site

TI - Hydrogen atoms in solid xenon: Trapping site structure, distribution, and stability as revealed by EPR studies in monoisotopic and isotopically enriched xenon matrices

T2 - Journal of Chemical Physics

AU - Feldman, Vladimir I

AU - Sukhov, Fedor F

AU - Orlov, Aleksei Yu

PY - 2008

DA - 2008/06/05

PB - AIP Publishing

SP - 214511

IS - 21

VL - 128

PMID - 18537437

SN - 0021-9606

SN - 1089-7690

ER -

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@article{2008_Feldman,

author = {Vladimir I Feldman and Fedor F Sukhov and Aleksei Yu Orlov},

title = {Hydrogen atoms in solid xenon: Trapping site structure, distribution, and stability as revealed by EPR studies in monoisotopic and isotopically enriched xenon matrices},

journal = {Journal of Chemical Physics},

year = {2008},

volume = {128},

publisher = {AIP Publishing},

month = {jun},

url = {https://pubs.aip.org/jcp/article/128/21/214511/959108/Hydrogen-atoms-in-solid-xenon-Trapping-site},

number = {21},

pages = {214511},

doi = {10.1063/1.2933366}

}

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Feldman, Vladimir I., et al. “Hydrogen atoms in solid xenon: Trapping site structure, distribution, and stability as revealed by EPR studies in monoisotopic and isotopically enriched xenon matrices.” Journal of Chemical Physics, vol. 128, no. 21, Jun. 2008, p. 214511. https://pubs.aip.org/jcp/article/128/21/214511/959108/Hydrogen-atoms-in-solid-xenon-Trapping-site.