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

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 ...

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.

The International Atomic Energy Agency (IAEA ... to between 2% and 94% by mass. The by-product uranium mixture (after the enriched uranium is removed) has reduced concentrations of U-235 and U-234.

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 ...