A 24-page indictment, handed down by a grand jury in May and unsealed on Friday, accuses Parviz Khaki of Iran and Zongcheng Yi of China of working together and with others to buy the materials, including 20 tons of high-strength maraging steel, 40 tons of aluminum alloy rods, radioactive materials, mass spectrometers, measuring instruments and vacuum system equipment.
"But for the critics, you would think the stuff was radioactive, contaminated by mass approval".
Several different processes can cause abundances to vary, among them radioactive decay and mass fractionation (see below).
More worrisome to Jerusalem and Washington, Russia is helping to build a nuclear reactor on the Persian Gulf, at Busheir, that some Western experts fear could help Iran build nuclear bombs or other radioactive weapons of mass destruction.
We know of no reliable evidence that the majority of the nonvolatile elements were released, and it is accepted that a huge radioactive lava-like mass of fuel remains in the reactor.
The cumulative activity concentration, that is, the total number of radioactive decays per mass unit, was determined by estimating the area under the curve for the activity concentration in each organ vs time.
Since the uptake of iron via the natural way (guts) is slow compared to the inner exchange rates, the radioactive tracer (by mass being less than 2% of total plasma iron) has to be introduced at time t = 0 intravenously in the form of transferrin-bound iron or of ionic salt that equilibrates quickly with transferrin-bound iron.
Artificial radioactive isotopes have masses of 10 13 and 16 24.
Among 25 (excluding nuclear isomers) radioactive isotopes with masses ranging from 36 to 61, the most stable is scandium-46 (half-life of 83.79 days), and the least stable is scandium-39 (half-life of less than 300 nanoseconds).
But even a small nuclear weapon detonated below ground would spew out a mass of radioactive material.
