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Electron-Ion Coincidence Spectroscopy as a New Tool for Surface Analysis –an Application to the Ice Surface
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Electron-ion coincidence (EICO) spectroscopy
[K. Mase, M. Nagasono, S. Tanaka, M. Kamada, T.Urisu and Y. Murata: Rev. Sci. Inst. 68 (1997) 1703]
has recently been developed to investigate the process of ion desorption induced by the core level
excitation. In the present study, we apply EICO spectroscopy
to determine the O1s level of condensed
H2O (ice) at 100 K. The kinetic energy of O1s photoelectrons
which gives the highest coincidence yield of H+ desorption
is shifted by about -0.7 eV compared to the O1s peak observed
in the conventional core-level photoelectron spectroscopy.
It is ascribed to a core-level shift
in the O1s level from which hydrogen ions desorb.
The results indicate the advantages and the possibilities
of the EICO spectroscopy for surface analysis.
IOP Publishing
Title: Electron-Ion Coincidence Spectroscopy as a New Tool for Surface Analysis –an Application to the Ice Surface
Description:
Electron-ion coincidence (EICO) spectroscopy
[K.
Mase, M.
Nagasono, S.
Tanaka, M.
Kamada, T.
Urisu and Y.
Murata: Rev.
Sci.
Inst.
68 (1997) 1703]
has recently been developed to investigate the process of ion desorption induced by the core level
excitation.
In the present study, we apply EICO spectroscopy
to determine the O1s level of condensed
H2O (ice) at 100 K.
The kinetic energy of O1s photoelectrons
which gives the highest coincidence yield of H+ desorption
is shifted by about -0.
7 eV compared to the O1s peak observed
in the conventional core-level photoelectron spectroscopy.
It is ascribed to a core-level shift
in the O1s level from which hydrogen ions desorb.
The results indicate the advantages and the possibilities
of the EICO spectroscopy for surface analysis.
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