Nuclear Chemistry of Astatine (At)

Evaluation of a Wet Chemistry Method for Isolation of Cyclotron Produced [211At]Astatine

A “wet chemistry” approach for isolation of At from an irradiated bismuth target is described. The approach involves five steps: (1) dissolution of bismuth target in conc. HNO3; (2) removal of the HNO3 by distillation; (3) dissolution of residue in 8 M HCl; (4) extraction of At from 8 M HCl into DIPE; and (5) extraction of At from DIPE into NaOH. Results from 55 “optimized” At isolation runs ga...

Assessment of an effective quasirelativistic methodology designed to study astatine chemistry in aqueous solution.

A cost-effective computational methodology designed to study astatine (At) chemistry in aqueous solution has been established. It is based on two-component spin-orbit density functional theory calculations and solvation calculations using the conductor-like polarizable continuum model in conjunction with specific astatine cavities. Theoretical calculations are confronted with experimental data ...

Radiochemistry and Nuclear Chemistry Laboratory at Washington University

(B) Multi-elemental analysis by X-ray fluorescence. (use in Art, Archeology and environmental science)(1 week). The advent of inexpensive high-resolution X-ray spectrometers based on thermoelectrically cooled Si-PIN diodes has opened the possibility of many innovative experiments in analytical chemistry with many applications in art and archeology, environmental monitoring, nuclear medicine, to...

Condensed astatine: monatomic and metallic.

The condensed matter properties of the nominal terminating element of the halogen group with atomic number 85, astatine, are as yet unknown. In the intervening more than 70 years since its discovery significant advances have been made in substrate cooling and the other techniques necessary for the production of the element to the point where we might now enquire about the key properties astatin...

Radiochemistry and Nuclear Chemistry