alpha emitter वाक्य
उदाहरण वाक्य
मोबाइल
- 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 ).
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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 ).
- 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.
- 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 ).
- Depleted uranium consists mainly of 235 U which decays with a similar half-life of about 7.038 ?10 8 years, both of them would still be regarded as weak alpha emitters and their radioactivity is only hazardous with direct contact or ingestion.
- Our latest HST observations demonstrate that the extreme GPs are Lyman-alpha emitters ( LAEs ), with the strongest Lya emission present in objects that lack absorption lines from the neutral interstellar medium ( ISM ), such as Carbon II ( wavelength133.5 nm ).
- The second longest-living astatine-211 is the only one to find a commercial use, being useful as an alpha emitter in medicine; however, only extremely small quantities are used, and in larger ones it is very hazardous, as it is intensely radioactive.
- Really, the last thing you need is a faceful ( followed by a lungful ) of an alpha emitter compound if you accidentally jostle the pigs and the lid comes off one of them . . .-- talk ) 02 : 07, 20 August 2008 ( UTC)
- The alpha emitter and the beryllium are pulverized and mixed together in close intimate contact to insure a high percentage of alpha-emitter and beryllium nuclei in close contact, since the alpha has a very short range through material, and would lose energy preventing reaction if sufficiently far away.
- "' Electrostatic control "'- To avoid the build-up of static electricity in production of paper, plastics, synthetic textiles, etc ., a ribbon-shaped source of the alpha emitter 241 Am can be placed close to the material at the end of the production line.
- However, in spent nuclear fuel that does not quickly undergo nuclear reprocessing but instead is cooled for years after use, much or most of the Pu-241 will beta decay to americium-241, one of the minor actinides, a strong alpha emitter, and difficult to use in thermal reactors.
- Note, by the way, that the amount produced is probably almost identically to the amount used on Earth today, since it has a relatively long half life ( it is a weak alpha emitter ) .-- 24.147.86.187 22 : 58, 7 September 2007 ( UTC)
- Fissile Pu-239 is produced following neutron capture by uranium-238, but further neutron capture will produce Pu-240 which is less fissile and worse, is a fairly strong neutron emitter, and Pu-241 which decays to Am-241, a strong alpha emitter that poses self-heating and radiotoxicity problems.
- Radium-226 has a half-life of about 1600 years, whereas polonium-210 is only about 138 days . ( And they're both alpha emitters of comparable energy, so it's an apples-to-apples comparison . )-- Trovatore 04 : 22, 1 December 2006 ( UTC)
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