We report computer based simulations of energetics, spectroscopy, and electron-phonon interaction of americium using a novel spectral density functional method. This approach gives rise to a new concept of a many-body electronic structure and reveals the unexpected mixed valence regime of Am 5f6 electrons which under pressure acquire the 5f7 valence state. This explains the unique properties of...

Abstract For operational and quality control of ferrous metal ores, ionizing radiation sources are used, which main characteristics energy, activity half-life. The technological parameters the Americium-241, Thulium-170 Cadmium-109 have been compered, Americium-241 with an energy 60 keV a half-life 458 years has selected. Laboratory studies dependence integrated flux scattered gamma rays on con...

Abstract The Joint Research Centre, in cooperation with the Commissariat à l’Energie Atomique et aux Energies Alternatives, produced a novel 243 Am spike reference material for mass spectrometry. Americium solution an isotopic composition of 88% and 12% 241 was used as source preparation material. certified value 5.696 (11) nmol g −1 amount content 0.136138 (54) n ( Am)/ Am) ratio were assigned...

An a irradiation device is described that utilises a commercially available disc-shaped americium-241 source of 8 cm diameter. The a particles traverse a moving collimator and the source is rotated to reduce the influence of source inhomogeneities. Source, collimator and a shutter disc are mounted in a container which is flushed with helium to reduce energy losses of the a particles before reac...