RADIOACTIVITY.EU.COM

icon THE PHENOMENON

THE PHENOMENON

icon IN DAILY LIFE

IN DAILY LIFE

icon QUESTION OF DOSES

QUESTION OF DOSES

icon AT THE DOCTOR’S

AT THE DOCTOR’S

icon At the laboratory

At the laboratory

icon At the museum

At the museum

icon NUCLEAR ENERGY

NUCLEAR ENERGY

icon RADIOACTIVE WASTE

RADIOACTIVE WASTE

The aim of this web site is to explain radioactivity and its applications to the general public.

Energy units : eV, keV, MeV

The unit of energy adapted to the atomic scale is the electronvolt or eV. One electronvolt is the energy gained by a corpuscle carrying an elementary electric charge (such as the electron or the proton) in the presence of a potential difference of 1 Volt. The unit is very small (0.16 billionth of a billionth of a joule). The energies required to expel external electrons from an atom or the energies released during a chemical reaction, are commonly of a few eV. The energies involved in nuclear processes are about one million times greater than those observed in chemical phenomena. For this reason, it is convenient to express these energies in million of electronvolts or MeV. The intermediate unit is one thousand electron volts, or keV.

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