युरोपियम: Difference between revisions

 

== Applications ==

There are many commercial applications for europium metal, it has been used to [[dopant|dope]] some types of [[glass]] to make [[laser]]s, as well as for screening for [[Down syndrome]] and some other genetic diseases. Due to its amazing ability to absorb neutrons, it is also being studied for use in nuclear reactors. Europium oxide (Eu₂O₃) is widely used as a red [[phosphor]] in [[Cathode ray tube|television sets]] and [[fluorescent lamps]], and as an activator for [[yttrium]]-based phosphors. Whereas trivalent europium gives red phosphors, the luminescence of divalent europium depends on the host lattice, but tends to be on the blue side. The two europium phosphor classes (red and blue), combined with the yellow/green terbium phosphors give "white" light, the color temperature of which can be varied by altering the proportion or specific composition of the individual phosphors. This is the phosphor system typically encountered in the helical fluorescent lightbulbs. Combining the same three classes is one way to make trichromatic systems in TV and computer screens. It is also being used as an agent for the manufacture of fluorescent glass. <!--A salt of Europium is a component of the newer phosphorescent powders and paints, some of which will glow for days after a few minutes of exposure to light. PLEASE SEE TALK --> Europium fluorescence is used to interrogate biomolecular interactions in drug-discovery screens. It is also used in the anti-counterfeiting phosphors in [[Euro]] banknotes. <ref> Europium and the Euro [http://www.smarterscience.com/eurosandeuropium.html]</ref>

 

* [[Sulfide]]s: [[europium(II) sulfide|EuS]]

* [[Selenide]]s: [[europium(II) selenide|EuSe]]

* [[Nitride]]s: [[europium(III) nitride|EuN]]

The accessible divalency of europium has always made it one of the easiest lanthanides to extract and purify, even when present, as it usually is, in low concentration.

''See also [[:Category:Europium compounds|europium compounds]].''

Europium is produced by nuclear fission, but the [[fission product yield]]s of europium isotopes are low near the top of the mass range for [[fission products]].

 

 

¹⁵¹Eu is the [[beta decay]] product of [[Sm-151]], but since this has a long decay half-life and short mean time to neutron absorption, most ¹⁵¹Sm instead winds up as ¹⁵²Sm.

{{Commons|Europium}}

{{wiktionary|europium}}

{{clear}}

{{Compact periodic table}}

{{तत्त्व}}

<!-- interwiki -->

 

[[af:Europium]]

[[kn:ಯುರೋಪಿಯಮ್]]

[[ko:유로퓸]]

[[kv:Европий]]

[[la:Europium]]