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Positron annihilation in small molecules

M Charlton, T Giles, H Lewis, D P van der Werf, Dirk van der Werf Orcid Logo

Journal of Physics B: Atomic, Molecular and Optical Physics, Volume: 46, Issue: 19, Start page: 195001

Swansea University Author: Dirk van der Werf Orcid Logo

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DOI (Published version): 10.1088/0953-4075/46/19/195001

Abstract

Positron annihilation in room temperature samples of the molecular gases N2, O2, CO, N2O and CH4 has been studied in the density range below 10 amagat using the positron lifetime technique. Careful analyses of the density dependence of the free positron annihilation rates have been performed that ha...

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Published in: Journal of Physics B: Atomic, Molecular and Optical Physics
ISSN: 0953-4075 1361-6455
Published: 2013
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URI: https://cronfa.swan.ac.uk/Record/cronfa15931
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first_indexed 2013-09-26T11:45:32Z
last_indexed 2018-02-09T04:48:11Z
id cronfa15931
recordtype SURis
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spelling 2013-09-14T09:11:39.3065443 v2 15931 2013-09-13 Positron annihilation in small molecules 4a4149ebce588e432f310f4ab44dd82a 0000-0001-5436-5214 Dirk van der Werf Dirk van der Werf true false 2013-09-13 SPH Positron annihilation in room temperature samples of the molecular gases N2, O2, CO, N2O and CH4 has been studied in the density range below 10 amagat using the positron lifetime technique. Careful analyses of the density dependence of the free positron annihilation rates have been performed that have allowed the annihilation parameter, &#60;Zeff&#62;, to be extracted. We compare our results to those in the literature, and give recommended &#60;Zeff&#62; values from experiment. We have also synthesized the existing data for H2 and derived a recommended value for the annihilation parameter for this molecule. Journal Article Journal of Physics B: Atomic, Molecular and Optical Physics 46 19 195001 0953-4075 1361-6455 12 9 2013 2013-09-12 10.1088/0953-4075/46/19/195001 COLLEGE NANME Physics COLLEGE CODE SPH Swansea University 2013-09-14T09:11:39.3065443 2013-09-13T21:03:15.1571679 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics M Charlton 1 T Giles 2 H Lewis 3 D P van der Werf 4 Dirk van der Werf 0000-0001-5436-5214 5
title Positron annihilation in small molecules
spellingShingle Positron annihilation in small molecules
Dirk van der Werf
title_short Positron annihilation in small molecules
title_full Positron annihilation in small molecules
title_fullStr Positron annihilation in small molecules
title_full_unstemmed Positron annihilation in small molecules
title_sort Positron annihilation in small molecules
author_id_str_mv 4a4149ebce588e432f310f4ab44dd82a
author_id_fullname_str_mv 4a4149ebce588e432f310f4ab44dd82a_***_Dirk van der Werf
author Dirk van der Werf
author2 M Charlton
T Giles
H Lewis
D P van der Werf
Dirk van der Werf
format Journal article
container_title Journal of Physics B: Atomic, Molecular and Optical Physics
container_volume 46
container_issue 19
container_start_page 195001
publishDate 2013
institution Swansea University
issn 0953-4075
1361-6455
doi_str_mv 10.1088/0953-4075/46/19/195001
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 0
active_str 0
description Positron annihilation in room temperature samples of the molecular gases N2, O2, CO, N2O and CH4 has been studied in the density range below 10 amagat using the positron lifetime technique. Careful analyses of the density dependence of the free positron annihilation rates have been performed that have allowed the annihilation parameter, &#60;Zeff&#62;, to be extracted. We compare our results to those in the literature, and give recommended &#60;Zeff&#62; values from experiment. We have also synthesized the existing data for H2 and derived a recommended value for the annihilation parameter for this molecule.
published_date 2013-09-12T03:18:11Z
_version_ 1763750436654809088
score 10.999161

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