Electron Energy Loss Spectroscopy of Actinides at the Nanogram Scale

Abstract

Actinide atoms have seven valence 5f-orbitals, leading to complicated electronic structures and fascinating properties for both free metal ions and their compounds [1]. Yet, comparatively little is known about most of them, mostly because they are without exception radioactive and handling them poses an inherent health risk. Due to contamination and radiation safety issues, it is often necessary to extensively prepare experiments, perform dry runs using non-radioactive surrogates, and to use dedicated instruments and facilities. Most actinides are synthetic elements and their preparation is timeconsuming, difficult and therefore expensive, with microgram prices reaching thousands of dollars.