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28.11.2017 - Ruth Signorell - Low-energy electron transport in water: Clusters, droplets, and liquid bulk

ETH Zürich
When Nov 28, 2017
from 06:00 PM to 07:00 PM
Where HS II, Physik Hochhaus, Hermann-Herder-Str. 3
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Even though low-energy electron scattering in liquid water is of high relevance for the modelling of
radiation damage processes, radiolysis, and the analysis of photoelectron spectra, detailed scattering data have so far neither been accessible by experiment nor by theory [1-4]. For lack of liquid water data, current descriptions thus use the amorphous ice data [5] and/or rescaled gas phase parameters to describe the scattering of low-energy electrons (LEEs) (< 50eV electron kinetic energy). The important parameters are the multiple differential cross sections (MDCs) with respect to electron kinetic energy, energy loss, and scattering angle, of all relevant scattering processes (elastic; inelastic (electron-phonon, electron-vibron, electron-electron)). Our recent derivation of MDCs for liquid water from photoelectron imaging of water droplets and water clusters provides a starting point for definite answers to fundamental questions regarding the electron dynamics in liquid water [6-8].

[1] N. Ottosson, M. Faubel, S. E. Bradforth, P. Jungwirth, B. Winter, J. Electron Spectrosc. Relat. Phenom., 177 (2010) 60.
[2] S. Thürmer, R. Seidel, M. Faubel, W. Eberhardt, J.C. Hemminger, S.E. Bradforth, B. Winter, Phys. Rev. Lett., 111 (2013) 173005.
Y.-I. Suzuki, K. Nishizawa, N. Kurahashi, T. Suzuki, Phys. Rev. E, 90 (2014) 010302.
[4] H. Shinotsuka, B. da, S. Tanuma, H. Yoshikawa,
C. J. Powell, D. R. Penn, Surf. Interf Anal. 49 (2017) 238.
M. Michaud, A. Wen, L. Sanche, Radiat. Res., 159 (2003) 3.
[6] R. Signorell, M. Goldmann, B. L. Yoder, A. Bodi, E. Chasovskikh, L. Lang, D. Luckhaus, Chem.
Phys. Lett., 658 (2016), 1. arXiv:1603.04188
[7] S. Hartweg, B.L. Yoder, G.A. Garcia, L. Nahon, R. Signorell, Phys. Rev. Lett., 118, (2017), 103402 (2017). arXiv:1612.02338
[8] D. Luckhaus, Y.-I. Yamamoto, T. Suzuki, R. Signorell, Sci. Adv., 3 (2017) e1603224.

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