“…However, experiments with transuranics have been very limited in number (Kalkowski, Kaindl, Bertram et al, 1987;Petit-Maire et al, 1989;Combes et al, 1992). In 1993 a US Department of Energy review established the fundamental basis of experimental and safety procedures for transuranic experiments at the Stanford Synchrotron Radiation Laboratory (SSRL), which enabled several EXAFS studies of solutions and solids containing Np and Pu (Allen, Veirs et al, 1996;Allen et al, 1997;Clark et al, 1997Clark et al, , 1998Conradson, 1998;Den Auwer et al, 1999). At SSRL the maximum allowed quantity of 237 Np in the experimental X-ray hutch at any one time must be less than 50 mCi.…”