Hard radiation
Encyclopedia
Hard radiation is a term used to describe high-energy electromagnetic radiation
, typically high energy X-ray
s or gamma ray
s. The term refers to the ability of the rays to penetrate a given thickness of material, typically a lead shield.
Hard radiation is able to cross 167 gcm−2 of lead (composed by p with energy greater than 1 GeV
, m with E>300 MeV
and e and g with E>10 GeV)
Electromagnetic radiation
Electromagnetic radiation is a form of energy that exhibits wave-like behavior as it travels through space...
, typically high energy X-ray
X-ray
X-radiation is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz and energies in the range 120 eV to 120 keV. They are shorter in wavelength than UV rays and longer than gamma...
s or gamma ray
Gamma ray
Gamma radiation, also known as gamma rays or hyphenated as gamma-rays and denoted as γ, is electromagnetic radiation of high frequency . Gamma rays are usually naturally produced on Earth by decay of high energy states in atomic nuclei...
s. The term refers to the ability of the rays to penetrate a given thickness of material, typically a lead shield.
Hard radiation is able to cross 167 gcm−2 of lead (composed by p with energy greater than 1 GeV
Electronvolt
In physics, the electron volt is a unit of energy equal to approximately joule . By definition, it is equal to the amount of kinetic energy gained by a single unbound electron when it accelerates through an electric potential difference of one volt...
, m with E>300 MeV
Electronvolt
In physics, the electron volt is a unit of energy equal to approximately joule . By definition, it is equal to the amount of kinetic energy gained by a single unbound electron when it accelerates through an electric potential difference of one volt...
and e and g with E>10 GeV)