Joelle T. Reiser, John S. McCloy, Marc H. Weber, Benjamin P. Parruzot, Joseph V. Ryan, Nathalie A. Wall, “The Use of Positrons to Survey Alteration Layers on Synthetic Nuclear Waste Glasses,” Journal of Nuclear Materials, 490, 75-84 (2017), http://dx.doi.org/10.1016/j.jnucmat.2017.03.007