Abstract
We report measurements of low-energy electron stimulated desorption of D{sup -}, O{sup -} and OD{sup -} anions from multilayer amorphous D{sub 2}O films physisorbed on a Pt substrate. The 0-20 eV incident energy dependence (i.e., the yield function) of the desorbed D{sup -} yield reveals the presence of a strong peak located at 7.2 eV with a shoulder near 9 eV, which are due to dissociation of the transient states {sup 2}B{sub 1} and {sup 2}A{sub 1} of D{sub 2}O, respectively. The O{sup -} and OD{sup -} yield functions each exhibit a single broad structure between 5 and 12 eV which also result from dissociative electron attachment (DEA). Due to the weakness of the O{sup -} and OD{sup -} signals, three possible processes involving DEA must be considered to explain their yield functions, i.e., direct DEA, reactive scattering and DEA to a new product in the film synthesized by the electron beam. It is concluded that at large electron doses (>7.5x10{sup 14} electrons/cm{sup 2}), these broad peaks arise from DEA to a new product, whereas at lower dose the possibility of direct DEA (i.e., e{sup -}+D{sub 2}O{yields}D{sub 2}O{sup -}{yields}O{sup -}+D{sub 2} and OD{sup -}+D) cannot be entirely discounted. Above 15
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Xiaoning, Pan;
[1]
Abdoul-Carime, Hassan;
[1]
Cloutier, Pierre;
[1]
Bass, Andrew D;
[1]
Sanche, Leon
[1]
- Group of the Canadian Institutes of Health Research in the Radiation Sciences, Faculte de Medecine, Universite de Sherbrooke, Sherbrooke, Quebec, J1H 5N4 (Canada)
Citation Formats
Xiaoning, Pan, Abdoul-Carime, Hassan, Cloutier, Pierre, Bass, Andrew D, and Sanche, Leon.
D{sup {sup -}}, O{sup {sup -}} and OD{sup {sup -}} desorption induced by low-energy (0-20 eV) electron impact on amorphous D{sub 2}O films.
United Kingdom: N. p.,
2005.
Web.
doi:10.1016/j.radphyschem.2004.04.138.
Xiaoning, Pan, Abdoul-Carime, Hassan, Cloutier, Pierre, Bass, Andrew D, & Sanche, Leon.
D{sup {sup -}}, O{sup {sup -}} and OD{sup {sup -}} desorption induced by low-energy (0-20 eV) electron impact on amorphous D{sub 2}O films.
United Kingdom.
https://doi.org/10.1016/j.radphyschem.2004.04.138
Xiaoning, Pan, Abdoul-Carime, Hassan, Cloutier, Pierre, Bass, Andrew D, and Sanche, Leon.
2005.
"D{sup {sup -}}, O{sup {sup -}} and OD{sup {sup -}} desorption induced by low-energy (0-20 eV) electron impact on amorphous D{sub 2}O films."
United Kingdom.
https://doi.org/10.1016/j.radphyschem.2004.04.138.
@misc{etde_20620240,
title = {D{sup {sup -}}, O{sup {sup -}} and OD{sup {sup -}} desorption induced by low-energy (0-20 eV) electron impact on amorphous D{sub 2}O films}
author = {Xiaoning, Pan, Abdoul-Carime, Hassan, Cloutier, Pierre, Bass, Andrew D, and Sanche, Leon}
abstractNote = {We report measurements of low-energy electron stimulated desorption of D{sup -}, O{sup -} and OD{sup -} anions from multilayer amorphous D{sub 2}O films physisorbed on a Pt substrate. The 0-20 eV incident energy dependence (i.e., the yield function) of the desorbed D{sup -} yield reveals the presence of a strong peak located at 7.2 eV with a shoulder near 9 eV, which are due to dissociation of the transient states {sup 2}B{sub 1} and {sup 2}A{sub 1} of D{sub 2}O, respectively. The O{sup -} and OD{sup -} yield functions each exhibit a single broad structure between 5 and 12 eV which also result from dissociative electron attachment (DEA). Due to the weakness of the O{sup -} and OD{sup -} signals, three possible processes involving DEA must be considered to explain their yield functions, i.e., direct DEA, reactive scattering and DEA to a new product in the film synthesized by the electron beam. It is concluded that at large electron doses (>7.5x10{sup 14} electrons/cm{sup 2}), these broad peaks arise from DEA to a new product, whereas at lower dose the possibility of direct DEA (i.e., e{sup -}+D{sub 2}O{yields}D{sub 2}O{sup -}{yields}O{sup -}+D{sub 2} and OD{sup -}+D) cannot be entirely discounted. Above 15 eV, all anion yield functions exhibit a monotonic rise due to direct dipolar dissociation.}
doi = {10.1016/j.radphyschem.2004.04.138}
journal = []
issue = {2-3}
volume = {72}
journal type = {AC}
place = {United Kingdom}
year = {2005}
month = {Feb}
}
title = {D{sup {sup -}}, O{sup {sup -}} and OD{sup {sup -}} desorption induced by low-energy (0-20 eV) electron impact on amorphous D{sub 2}O films}
author = {Xiaoning, Pan, Abdoul-Carime, Hassan, Cloutier, Pierre, Bass, Andrew D, and Sanche, Leon}
abstractNote = {We report measurements of low-energy electron stimulated desorption of D{sup -}, O{sup -} and OD{sup -} anions from multilayer amorphous D{sub 2}O films physisorbed on a Pt substrate. The 0-20 eV incident energy dependence (i.e., the yield function) of the desorbed D{sup -} yield reveals the presence of a strong peak located at 7.2 eV with a shoulder near 9 eV, which are due to dissociation of the transient states {sup 2}B{sub 1} and {sup 2}A{sub 1} of D{sub 2}O, respectively. The O{sup -} and OD{sup -} yield functions each exhibit a single broad structure between 5 and 12 eV which also result from dissociative electron attachment (DEA). Due to the weakness of the O{sup -} and OD{sup -} signals, three possible processes involving DEA must be considered to explain their yield functions, i.e., direct DEA, reactive scattering and DEA to a new product in the film synthesized by the electron beam. It is concluded that at large electron doses (>7.5x10{sup 14} electrons/cm{sup 2}), these broad peaks arise from DEA to a new product, whereas at lower dose the possibility of direct DEA (i.e., e{sup -}+D{sub 2}O{yields}D{sub 2}O{sup -}{yields}O{sup -}+D{sub 2} and OD{sup -}+D) cannot be entirely discounted. Above 15 eV, all anion yield functions exhibit a monotonic rise due to direct dipolar dissociation.}
doi = {10.1016/j.radphyschem.2004.04.138}
journal = []
issue = {2-3}
volume = {72}
journal type = {AC}
place = {United Kingdom}
year = {2005}
month = {Feb}
}