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Showing posts with label Radioactive. Show all posts
Showing posts with label Radioactive. Show all posts
Monday, October 23, 2017
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Tuesday, November 30, 2010
Radioactive Isotopes
Chapter 6 -Form 4 : Nuclear Energy
Radioactive Isotopes
Kredit : http://www.youtube.com/user/msnye
Alpha particles, beta particles and gamma rays.
Alpha particles are helium nuclei with a +2 charge, Big, heavy and slow moving, don't penetrate into materials, Very ionising, Blocked by paper.
Beta particles are high-energy electrons with a -1 charge; Quite small, move quite fast, Penetrate materials moderately, Ionise moderately, for every beta particle emitted, a neutron turns into a proton in the nucleus, some are blocked by thin Aluminium, but certainly blocked by tissue.
Gamma rays are electromagnetic waves with shorter wavelength (higher frequency) than x-rays, Opposite to alpha, Penetrate materials well, Weakly ionising, blocked by 7 cm of lead.
Radioactive Isotopes
Kredit : http://www.youtube.com/user/msnye
Alpha particles, beta particles and gamma rays.
Alpha particles are helium nuclei with a +2 charge, Big, heavy and slow moving, don't penetrate into materials, Very ionising, Blocked by paper.
Beta particles are high-energy electrons with a -1 charge; Quite small, move quite fast, Penetrate materials moderately, Ionise moderately, for every beta particle emitted, a neutron turns into a proton in the nucleus, some are blocked by thin Aluminium, but certainly blocked by tissue.
Gamma rays are electromagnetic waves with shorter wavelength (higher frequency) than x-rays, Opposite to alpha, Penetrate materials well, Weakly ionising, blocked by 7 cm of lead.
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