dorsal/arxiv
View SchemaEnvironment influence on the IR fluorescence of Xe$_{2}^{*}$ molecules in electron beam excited Ar--Xe mixture at high density
| Authors | A. F. Borghesani, G. Carugno, D. Iannuzzi, I. Mogentale |
|---|---|
| Categories | |
| ArXiv ID | physics/0503222 |
| URL | https://arxiv.org/abs/physics/0503222 |
| DOI | 10.1140/epjd/e2005-00077-9 |
Abstract
We report new measurements of the near infrared (NIR) Xe$_2^*$ excimer fluorescence in an electron--beam--excited Ar (90%)--Xe (10 %) mixture at room temperature. Previous measurements up to a density $N\approx 2\times 10^{26}$ m$^{-3}$ discovered a broad excimer fluorescence band at $\approx 7800$ cm$^{-1},$ whose center is red--shifted by increasing $N$ (A. F. Borghesani, G. Bressi, G. Carugno, E. Conti, and D. Iannuzzi, {\em J. Chem. Phys.}, {\bf 115}, 6042 (2001)). The shift has been explained by assuming that the energy of the optical active electron in the molecule is shifted by the density--dependent Fermi shift and by accounting for the solvation effect due to the environment. We have extended the density range up to $N\approx 6\times 10^{26}$ m$^{-3}, $ confirming the previous measurements and extending the validity of the interpretative model. A detailed analysis of the width of the fluorescence band gives a value of 2.85 nm for the size of the investigated excimer state. Such a large value lends credence to the validity of the proposed explanation of the experimental findings.
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"abstract": "We report new measurements of the near infrared (NIR) Xe$_2^*$ excimer\nfluorescence in an electron--beam--excited Ar (90%)--Xe (10 %) mixture at room\ntemperature. Previous measurements up to a density $N\\approx 2\\times 10^{26}$\nm$^{-3}$ discovered a broad excimer fluorescence band at $\\approx 7800$\ncm$^{-1},$ whose center is red--shifted by increasing $N$ (A. F. Borghesani, G.\nBressi, G. Carugno, E. Conti, and D. Iannuzzi, {\\em J. Chem. Phys.}, {\\bf 115},\n6042 (2001)). The shift has been explained by assuming that the energy of the\noptical active electron in the molecule is shifted by the density--dependent\nFermi shift and by accounting for the solvation effect due to the environment.\nWe have extended the density range up to $N\\approx 6\\times 10^{26}$ m$^{-3}, $\nconfirming the previous measurements and extending the validity of the\ninterpretative model. A detailed analysis of the width of the fluorescence band\ngives a value of 2.85 nm for the size of the investigated excimer state. Such a\nlarge value lends credence to the validity of the proposed explanation of the\nexperimental findings.",
"arxiv_id": "physics/0503222",
"authors": [
"A. F. Borghesani",
"G. Carugno",
"D. Iannuzzi",
"I. Mogentale"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1140/epjd/e2005-00077-9",
"title": "Environment influence on the IR fluorescence of Xe$_{2}^{*}$ molecules in electron beam excited Ar--Xe mixture at high density",
"url": "https://arxiv.org/abs/physics/0503222"
},
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