2003 atomic mass evaluation, NUBASE, PC-NUCLEUS. The program QCALC has been produced by the National Nuclear Data Center of the Brookhaven National Laboratory, Upton, NY, USA, with funding from the ...

The International Atomic Energy Agency (IAEA) defines uranium as a Low Specific Activity material ... During the enrichment process the fraction of U-235 is increased from its natural level (0.72% by ...

was less than the atomic mass (average mass of the atom). For example, a helium atom has an atomic mass of 4, but an atomic number (or positive charge) of 2. Since electrons have almost no mass ...

Iran is "pressing the gas pedal" on its enrichment of uranium to near weapons grade, UN nuclear watchdog chief Rafael Grossi ...

Just 42 kg of uranium enriched to 60 percent purity is needed for one atomic bomb, according to the IAEA. Iran current possesses some 200 kg of uranium enriched to 60 percent purity, Grossi said.

Grossi said last month that Iran had informed the International Atomic Energy Agency that it would "dramatically" accelerate enrichment of uranium to up to 60% purity, closer to the roughly 90% of ...