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1 Alpha particles are just high-energy 4He nuclei; after decelerating and picking up electrons, they become atoms of 4He.
2 The radiation emitted by these isotopes consists of alpha particles, beta particles, and gamma rays.
3 This is the analogy to the alpha particle.
4 Upon gaining two electrons alpha particle becomes a helium atom.
5 And there he was able to identify the alpha particle as the helium nucleus.
6 A single alpha particle generates a track of from 30,000 to 70,000 positive and negative ions per cm, which may be polarized and moved about by ambient electric fields.
7 Upon gaining two electrons the alpha particle becomes a helium atom.
8 Thus the alpha particle is an exceptionally stable nuclear structure.
9 Suddenly there’s an alpha particle coming out of it,(www.Sentencedict.com) except the alpha particle is another universe.
10 Fresh soil samples, taken recently in the presence of journalists, are currently being investigated for gamma rays and alpha particles.
11 Helium is also made by radioactive decay of uranium and thorium, both of which decay by emission of alpha particles.
12 The helium atom without its electrons is known as an alpha particle, and is therefore positively charged.
13 Radium is readily absorbed into the body where it concentrates in the bone marrow and gives off very damaging alpha particles.
14 Type of radioactive disintegration (see radioactivity) in which some unstable atomic nuclei dissipate excess energy by spontaneously ejecting an alpha particle.
15 Both were by Ernest Rutherford, who had won the 1908 Nobel Prize in Chemistry in part for his discovery of the alpha particle, which he later proved was the nucleus of a helium atom.
16 Aluminium can be transformed, by the capture of an alpha particle and the emission of a proton, into a stable silicon atom.
17 So basically he's trying to put some atoms in the way of the alpha particle.
18 When plutonium decays, it emits what is known as an alpha particle, a relatively big particle that carries a lot of energy.
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