In this case alpha particles are emitted.
Lead-208 is formed by alpha decay (emission of alpha particles) from polonium-212.
Polonium-210 become lead-206 after the emission of an alpha particle.
The isotope lead-204 is obtained.
The reaction is:Po-216----------------alpha particle-----------------Pb-212
It depends somewhat on the type of radiation that one needs to be shielded.Lead is very effective for gamma rays, however if the radiation is mostly neutron radiation then borated reinforced concrete is much more effective than lead (the hydrogen in the water of crystallization in the concrete slows the neutrons and the boron then absorbs the slow neutrons). Nuclear reactors which produce intense radiation of both gamma ray and neutron often use alternating layers of lead plate and borated reinforced concrete for shielding.If all you are shielding against is beta radiation then a sheet of aluminum foil is typically adequate.If all you are shielding against is alpha radiation then your skin (do not ingest or inhale alpha emitters) or one sheet of paper is adequate.
Lead-208 is formed by alpha decay (emission of alpha particles) from polonium-212.
Polonium-212 loses 2 protons and 2 neutrons when it decays to lead-208. These 2 protons and 2 neutrons are lost as a single Helium nucleus. In other words, it is an alpha decay.
Polonium-210 decay to lead-206.
Polonium 210-----------alpha particles-----------Lead 206 Polonium 209-----------alpha particles-----------Lead 205 Polonium 208-----------alpha particles-----------Lead 204 Polonium 214-----------alpha particles-----------Lead 210 Polonium 218-----------alpha particles-----------Lead 214 (99,98 %) Polonium 218-----------beta particles------------Astatin 218 (o,o2 %) For other isotopes see the list at: http://en.wikipedia.org/wiki/Polonium#Isotopes
Polonium-210 become lead-206 after the emission of an alpha particle.
Polonium-210 lose an alpha particle and become lead-206.
Radiation damping is a phenomenon where electromagnetic waves emitted by an accelerating charged particle lead to the loss of energy and momentum from the particle. This process causes the particle to slow down due to the radiation it emits.
Any link between polonium and a pencil.
Polonium-218 decay to lead-214.
Lead is commonly used for storing and transporting radioactive materials due to its density and ability to block radiation. Lead containers can shield against harmful radiation emitted by radioactive materials, making it a suitable choice for safety purposes.
Lead. Lead is a heavy metal that protects against x-ray and some forms of radiation.
Gamma radiation is the most penetrating type of radiation emitted from naturally radioactive isotopes. It consists of electromagnetic waves with high energy and can penetrate through most materials, including thick layers of concrete and lead.