English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The effects on the local structure due to self-irradiation damage of Gastabilized $\delta$-Pu stored at cryogenic temperatures have been examinedusing extended x-ray absorption fine structure (EXAFS) experiments. Extensivedamage, seen as a loss of local order, was evident after 72 days of storagebelow 15 K. The effect was observed from both the Pu and Ga sites, althoughless pronounced around Ga. Isochronal annealing was performed on this sample tostudy the annealing processes that occur between cryogenic and room temperaturestorage conditions, where damage is mostly reversed. Damage fractions atvarious points along the annealing curve have been determined using anamplitude-ratio method, standard EXAFS fitting, and a spherical crystallitemodel, and provide information complementary to previous electricalresistivity- and susceptibility-based isochronal annealing studies. The use ofa spherical crystallite model accounts for the changes in EXAFS spectra usingjust two parameters, namely, the crystalline fraction and the particle radius.Together, these results are discussed in terms of changes to the localstructure around Ga and Pu throughout the annealing process and highlight theunusual role of Ga in the behavior of the lowest temperature anneals.

Isochronal annealing effects on local structure, crystalline fraction, and undamaged region size of radiation damage in Ga-stabilized $\delta$-Pu