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X-ray emission-photoion coincidence spectroscopy of the CO2 molecule at the O 1s edge
被引:4
|作者:
Kivimaeki, A.
[1
]
Alagia, M.
[1
]
Richter, R.
[2
]
机构:
[1] Lab TASC, CNR IOM, I-34149 Trieste, Italy
[2] Sincrotrone Trieste, I-34149 Trieste, Italy
关键词:
CARBON-DIOXIDE;
PHOTOELECTRON-SPECTRUM;
SYMMETRY-BREAKING;
CROSS-SECTIONS;
GAS-PHASE;
CORE;
EXCITATIONS;
IONIZATION;
THRESHOLD;
ENERGY;
D O I:
10.1016/j.cplett.2012.02.022
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Molecular dissociation following radiative decay of O 1s hole states in CO2 has been studied by detecting photoions in coincidence with undispersed soft X-ray emission. The production of ions after radiative decay is observed to increase from practically nothing at the O 1s -> pi* excitation to the appearance of CO2+, CO+, C+ and O+ ions when core-valence double excitations and O 1s shake-up transitions are induced. De-excitation pathways involving radiative decay from different core-hole states are discussed in order to interpret the results. A weak CO22+ signal is attributed to the radiative Auger effect. (C) 2012 Elsevier B.V. All rights reserved.
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页码:252 / 256
页数:5
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