When a charged particle moves through matter it loses energy primarily to excita

Question

When a charged particle moves through matter it loses energy primarily to excitation and ionization of the atoms in the medium. It also loses some energy due to collisions with nuclei in the medium. As it loses energy, it moves more slowly and eventually stops. The distance it travels is called its range. The range depends on many parameters that include the charge, mass and initial energy of the particle, and the density, ionization potential and atomic number of the atoms in the medium. In this experiment, you will use cardboard, copper foil, aluminum plate and lead sheet to block beta particles. If you had equal thicknesses of each substance, which would be most effective blocker? Which would be the least effective blocker?

Explanation / Answer

Beta particles are negatively charged electrons that are more difficult to shield against.

There are several factors that influence the selection and use of radioactive shielding materials. Considerations such as attenuation effectiveness, strength, resistance to damage, thermal properties, and cost efficiency can affect radiation protection in numerous ways. For example, metals are strong and resistant to radiation damage, but they undergo changes in their mechanical properties and degrade in certain ways from radiation exposure. Likewise, concretes are strong, durable, and relatively inexpensive to produce, but become weaker at elevated temperatures and less effective at blocking neutrons.

plastics and other lightweight materials are pound-for-pound more effective for shielding against cosmic radiation than aluminum.

But in the cardboard , copper foil , aluminum plate and lead sheet ..... the aluminium plate is most effective blocker..

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