Читать книгу Patty's Industrial Hygiene, Physical and Biological Agents - Группа авторов - Страница 19
3 BASIC PHYSICAL PRINCIPLES 3.1 Energy
ОглавлениеAll radiation effects, whether beneficial or detrimental, as well as all radiation measuring devices, are based on the absorption of energy from the radiation source.
In health physics and in atomic and nuclear physics, energy is measured in units of electron volts (eV). One electron volt represents the amount of kinetic energy possessed by an electron after it is accelerated by an electrical potential of 1 V. Commonly used multiples of the electron volt are the kiloelectron volt (keV), 1000 eV and the megaelectron volt (MeV), 106 eV. One electron volt = 1.6 × 10−12 erg or 1.6 × 10−19 J; 1 MeV = 1.6 × 10−6 erg or 1.6 × 10−13 J.
