It is now generally recognized in most countries that Radon-222 is the principal source of potentially hazard1,2 ous radiation source in the general population. Simple devices used to measure Radon levels in the air record the number of alpha particle tracks, evidence of the radioactive disintegration of Radon. The unit of radioactivity of nuclides (isotopes of elements that disintegrate sponta...

Emanation of radon (Rn) from several brands of cat (kitty) litter was measured with a continuous radon monitor. Radon emanating from the cat litters, encapsulated in an airtight container, produced equilibrium concentrations below 1.2 pCi/g. The measured radon flux was below 10 pCi/kg-hr for all the cat litters. Although each of the samples emitted a measurable amount of radon, the emanation is...

Beijing Radioactive Ion-beam Facilities Isotope Separator On-Line (BRISOL), aiming to generate short life radioactive ion beam (RIB) on-line, is being constructed at China Institute of Atomic Energy(CIAE). Up to now, construction of major equipment for BRISOL is completed, including ion source, vacuum system, separator, optical element, and beam diagnostic system, and assembling is underway in ...

SPIRAL2 (Système de Production d'Ions Radioactifs Accélérés en Ligne) is a research facility under construction at GANIL (Grand Accélérateur National d'Ions Lourds) for the production of radioactive ion beams by isotope separation on-line methods and low-energy in-flight techniques. A resonant ionization laser ion source will be one of the main techniques to produce the radioactive ion beams. G...

Uptake of (14)CO(2) in soils due to algae or sulfur-oxidizing bacteria was examined by incubation of soil samples with gaseous (14)CO(2) and subsequent chemical oxidation of biologically fixed radioactive isotope to (14)CO(2) for detection with a liquid scintillation counting system. The (14)CO(2) was added to the soil in the gas phase so that no alteration of the moisture or ionic strength of ...

This research aimed to develop new tumor targeted theranostic agents taking advantage of the similarities in coordination chemistry between technetium and rhenium. A γ-emitting radioactive isotope of technetium is commonly used in diagnostic imaging, and there are two β- emitting radioactive isotopes of rhenium that have the potential to be of use in radiotherapy. Variants of the 6-hydrazinonic...

NACTIVATION of bacteria and bacteriophages by decay of incorporated radio‘active phosphorus (P”) has been reported by STENT and FUERST (1955), FUERST and STENT (1956), STRAUSS, VAHARU, FRICKEY and MATHESON (1956), TESSMAN, TESSMAN and STENT (1957), MCFALL, PARDEE and STENT (1958), and KAUDEWITZ, VIELMETTER and FRIEDRICH-FREKSA ( 1958). These authors have suggested that the P32 disintegrations w...