Sper-scientific 840024 Digital Radiation Meter Manual de usuario descargar pdf (Pagina 18)

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RADIATION AND

RADIOACTIVITY

Alpha Particles

An alpha particle is identical to a

Helium nucleus having two protons and

two neutrons. When ionized by

radiation the ratio of neutrons to

protons is changed in the atom. This

causes atoms to restore the balance by

emitting alpha particles. Alpha particles

are large atoms that travel slowly in air

and lose energy rapidly after a few

inches or centimeters. This energy is

low enough to be stopped by a piece of

paper therefore alpha particles can

only be detected with specialized

equipment. Model 840024 cannot

detect alpha particles.

Common Alpha Emitters Energy MeV

Americium-241 5.48

Uranium-238 4.27

Radium-226 4.87

Radon-222 5.48

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