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Lead shielding - Wikipedia, the free encyclopedia
** Lead shielding **
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Lead bricks are commonly used as radiation shielding.
*Lead shielding* refers to the use of lead as a form of radiation
protection to shield people or objects from radiation so as to reduce the
effective dose. Lead can effectively attenuate certain kinds of radiation
because of its high density and high atomic number; principally, it is
effective at stopping gamma rays, and x-rays.
· 1 Operation
· 2 Use
· 3 See also
· 4 External links
Lead's high density is caused by the combination of its high atomic mass
and the relatively small size of its bond lengths and atomic radius. The
high atomic mass means that more electrons are needed to maintain a neutral
charge and the small bond length and a small atomic radius means that many
atoms can be packed into a particular lead structure. Because of
leadâs density and large number of electrons, it is well suited to
scattering x-rays and gamma-rays. These rays form photons, a type of boson,
which impart energy onto electrons when they come into contact. Without a
lead shield, the electrons within a personâs body would be affected,
which could damage their DNA and cause cancer. When the radiation attempts
to pass through lead, its electrons absorb and scatter the energy.
Eventually though, the lead will degrade from the energy to which it is
exposed. However, lead is not effective against all types of radiation.
High energy electrons (including beta radiation) incident on lead may
create bremsstrahlung radiation, which is potentially more dangerous to
tissue than the original radiation. Furthermore, lead is not a particularly
effective absorber of neutron radiation.
Lead is used for shielding in
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