Alpha Particle
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Positively charged particle emitted by various radioactive
materials during decay. It consists of two neutrons and two protons,
and is thus identical to the nucleus of a helium atom. The rest mass
of the alpha particle amounts to 6.64424·10-27 kg,
or 3.7273·109 eV. Alpha radiation is the radiation
with the lowest penetration potential of the three radiation types (alpha, beta, gamma
radiation). Alpha radiation can already be stopped by a sheet of
paper and is only dangerous for living creatures if the substance emitting
alpha rays is inhaled or ingested with food or enters wounds.
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11 - 15 March 2018
Munich, Germany
30 September - 04 October 2018
Prague, Czech Republic |
