Thus, native lead from the deep mines exhibit lower alpha emitters ( or so the lead refiners that charged us an arm and a leg for just a few hundred weight told us ).
22.
Another alpha emitter, 258 Md, has a half-life of 53 days . Both these isotopes are produced from rare einsteinium ( 253 Es and 255 Es respectively ), that therefore limits their availability.
23.
Similarly, 219 Rn is derived from the most stable isotope of actinium ( 227 Ac ) named " actinon " and is an alpha emitter with a half-life of 3.96 seconds.
24.
Because used fuel contains alpha emitters ( plutonium and the minor actinides ), the effect of adding an alpha emitter ( 238 Pu ) to uranium dioxide on the leaching rate of the oxide has been investigated.
25.
Because used fuel contains alpha emitters ( plutonium and the minor actinides ), the effect of adding an alpha emitter ( 238 Pu ) to uranium dioxide on the leaching rate of the oxide has been investigated.
26.
These sources can be extremely faint, in which case they can only be detected using through the emission in the Lyman-alpha emission line, such galaxies are frequently referred to as Lyman-alpha emitters.
27.
Sources may emit neutrons during spontaneous fission, as with californium; alternatively, an alpha emitter may be mixed with a light element for a nuclear reaction yielding excess neutrons, as with americium in a beryllium matrix.
28.
In practice, this mode of decay has only been observed in nuclides considerably heavier than nickel, with the lightest known alpha emitters being the lightest isotopes ( mass numbers 106 110 ) of tellurium ( element 52 ).
29.
Ingested alpha emitter radioisotopes such as transuranics or actinides are an average of about 20 times more dangerous, and in some experiments up to 1000 times more dangerous than an equivalent activity of beta emitting or gamma emitting radioisotopes.
30.
It has possible future uses in portable X-ray sources, and as auxiliary heat or power sources for space probes and satellites ( although the alpha emitter plutonium-238 has become standard for most space-exploration-related uses ).
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