Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 14, Pages 2961-2964Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.2961
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Americium occupies a pivotal position in the actinide series with regard to the behavior of 5f electrons. High-pressure techniques together with synchrotron radiation have been used to determine the structural behavior up to 100 GPa. We have resolved earlier controversial findings regarding americium and find that our experimental results are in discord with recent theoretical predictions. We have two new findings: (1) that there exists a critical, new structural link between americium under pressure and its near neighbor, plutonium; and (2) that the 5f electron delocalization in americium occurs in two rather than one step.
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