Ionic-charge dependence of the intermolecular coulombic decay time scale for aqueous ions probed by the core-hole clock.
Ionic-charge dependence of the intermolecular coulombic decay time scale for aqueous ions probed by the core-hole clock.
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核心孔时钟探测的水离子的分子间库仑衰变时间尺度的离子电荷依赖性。
DOI:
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发表时间:
2011
影响因子:
15
通讯作者:
O. Björneholm
中科院分区:
文献类型:
--
作者:
W. Pokapanich;N. Kryzhevoi;N. Ottosson;S. Svensson;L. Cederbaum;G. Öhrwall;O. Björneholm
Auger electron spectroscopy combined with theoretical calculations has been applied to investigate the decay of the Ca 2p core hole of aqueous Ca(2+). Beyond the localized two-hole final states on the calcium ion, originating from a normal Auger process, we have further identified the final states delocalized between the calcium ion and its water surroundings and produced by core level intermolecular Coulombic decay (ICD) processes. By applying the core-hole clock method, the time scale of the core level ICD was determined to be 33 ± 1 fs for the 2p core hole of the aqueous Ca(2+). The comparison of this time constant to those associated with the aqueous K(+), Na(+), Mg(2+), and Al(3+) ions reveals differences of 1 and up to 2 orders of magnitude. Such large variations in the characteristic time scales of the core level ICD processes is qualitatively explained by different internal decay mechanisms in different ions as well as by different ion-solvent distances and interactions.
影响因子:
19.6
作者:
Mucke, Melanie;Braune, Markus;Hergenhahn, Uwe
通讯作者:
Hergenhahn, Uwe
影响因子:
8.6
作者:
Marburger, S;Kugeler, O;Möller, T
通讯作者:
Möller, T
影响因子:
19.6
作者:
Jahnke, T.;Sann, H.;Doerner, R.
通讯作者:
Doerner, R.