Ballistic excited state dynamics revealed by polarized fs-XANES Roseanne J. Sension, Nicholas A. Miller, Aniruddha Deb, Roberto Alonso-Mori, James M. Glownia and James E. Penner-Hahn EPJ Web Conf., 205 (2019) 05014 Published online: 16 April 2019 DOI: 10.1051/epjconf/201920505014