Plutonium with high proliferation resistance

Japan’s Plutonium Program: a Proliferation Threat?

The Japanese plutonium program continues to dwell on the minds of nuclear nonproliferation watchers. Japan remains the only non-nuclear weapon state that is operating uranium enrichment and reprocessing plants, all of which are technically capable of producing fissile materials for nuclear weapons. The magnitude of these projects exceeds those of other nations that have either abandoned or post...

Plutonium problems.

Contaminants in Fish From the icy waters of Boston Harbor to the warm waves of San Diego Bay, bottomdwelling fish suffer liver damage caused by chemical contaminants, according to researchers at the National Oceanic and Atmospheric Administration. But seafood lovers need not panic, because damaged specimens were captured primarily in urban waters where commercial fishing is prohibited, said Lyn...

Concept of Proliferation Resistance

Calculated phonon spectra of plutonium at high temperatures.

We constructed computer-based simulations of the lattice dynamical properties of plutonium using an electronic structure method, which incorporates correlation effects among the f-shell electrons and calculates phonon spectra at arbitrary wavelengths. Our predicted spectrum for the face-centered cubic delta phase agrees well with experiments in the elastic limit and explains unusually large she...

Pilomyxoid astrocytoma with high proliferation index

Pilomyxoid astrocytomas is an uncommon aggressive piloid neoplasm, closely related to pilocytic astrocytomas and typically presents in the very young but can occur in older children and rarely in adults. A 12-years-old male presented with focal seizures, headache and vomiting of 10 days duration. Computed tomogram showed a hypo- to hyperdense and peripherally enhancing, solid-cystic lesion in t...