Journal article 1324 views
Positron annihilation in small molecules
Journal of Physics B: Atomic, Molecular and Optical Physics, Volume: 46, Issue: 19, Start page: 195001
Swansea University Author:
Dirk van der Werf
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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...
| Published in: | Journal of Physics B: Atomic, Molecular and Optical Physics |
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| ISSN: | 0953-4075 1361-6455 |
| Published: |
2013
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa15931 |
| 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 have allowed the annihilation parameter, <Zeff>, to be extracted. We compare our results to those in the literature, and give recommended <Zeff> values from experiment. We have also synthesized the existing data for H2 and derived a recommended value for the annihilation parameter for this molecule. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
19 |
| Start Page: |
195001 |