National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
This review was aimed to find out real life application of noble gas Helium. The noble gas helium (He) occupies the zero group of the periodic table. It is a very small and extremely light gaseous element and is very inert. Helium is liquefies at a temperature of −457.6°F (−272°C). At 1 atmosphere pressure it is a normal liquid from its boiling point at 4.22 K to 2.18 K and is designated helium - I state. Below its boiling point of 4.22 K and above the lambda point of 2.18 K, the isotope helium-4 exists in a normal colorless liquid state. Below 2.18 K, i.e. below its lambda point it is a liquid of very unique properties and is designated helium - II state, isotope helium - 3 exits in this state. This strange form of liquid helium has no measurable viscosity. Its conductivity for heat and electricity is several hundred times as great as that with metallic copper has at room temperature. It is referred to as a superconductor. Liquid helium is produced commercially for use in superconducting magnets such as those used in magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), Magnetoencephalography (MEG), and experiments in physics, such as low temperature Mössbauer spectroscopy, etc. It is used in balloons as lifting gas, used to create inert atmosphere in so many places. Its chief scientific use is in cryogenics (the science and art of producing very low temperatures). Helium has many biological applications e.g. heliox for deep divers, in neurology, in surgery, in radiology and in helium ion microscopy.
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