High energy radiation femtochemistry of water molecules: early electron-radical pairs processes Y. A. Gauduel, Y. Glinec, J.-P. Rousseau, F. Burgy and V. Malka Eur. Phys. J. D, 60 1 (2010) 121-135 Published online: 11 June 2010 DOI: 10.1140/epjd/e2010-00152-2