Isotopes of yttrium

Isotopes of yttrium

Natural yttrium (Y) is composed of only one isotope (Y-89). The most stable radioisotopes are Y-88 whichas a half life of 106.65 days and Y-91 with a half life of 58.51 days. All the other isotopes have half lives of less than a day except Y-87 which has a half life of 79.8 hours, and Y-90, with 64 hours. The dominant decay mode below the stable Y-89 is electron capture and the dominant mode after it is beta emission. Twenty six unstable isotopes have been characterized.

Y-90 exists in equilibrium with its parent isotope strontium-90, which is a product of nuclear explosions.
Standard atomic mass: 88.90585(2) u

Table

Notes

* Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
* Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

References

* Isotope masses from [http://www.nndc.bnl.gov/amdc/index.html Ame2003 Atomic Mass Evaluation] by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in "Nuclear Physics" A729 (2003).
* Isotopic compositions and standard atomic masses from [http://www.iupac.org/publications/pac/2003/7506/7506x0683.html Atomic weights of the elements. Review 2000 (IUPAC Technical Report)] . "Pure Appl. Chem." Vol. 75, No. 6, pp. 683-800, (2003) and [http://www.iupac.org/news/archives/2005/atomic-weights_revised05.html Atomic Weights Revised (2005)] .
* Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
** Audi, Bersillon, Blachot, Wapstra. [http://amdc.in2p3.fr/web/nubase_en.html The Nubase2003 evaluation of nuclear and decay properties] , Nuc. Phys. A 729, pp. 3-128 (2003).
** National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the [http://www.nndc.bnl.gov/nudat2/ NuDat 2.1 database] (retrieved Sept. 2005).
** David R. Lide (ed.), Norman E. Holden in "CRC Handbook of Chemistry and Physics, 85th Edition", online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.


Wikimedia Foundation. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Yttrium — (pronEng|ˈɪtriəm) is a chemical element with symbol Y and atomic number 39. It is a silvery metallic transition metal chemically similar to the lanthanoids and has historically been classified as a rare earth element. Yttrium is almost always… …   Wikipedia

  • Yttrium — Strontium ← Yttrium → Zirconium Sc …   Wikipédia en Français

  • YTTRIUM — De Ytterby, village de Suède. Symbole chimique: Y Numéro atomique: 39 Masse atomique: 88,905 g Point de fusion: 1 523 0C Point d’ébullition: 3 337 0C Densité (à 25 0C): 4,457 Élément chimique du groupe des terres rares, de couleur argentée,… …   Encyclopédie Universelle

  • yttrium — Symbol: Y Atomic number: 39 Atomic weight: 88.905 Silvery grey metallic element of group 3 on the periodic table. Found in uranium ores. The only natural isotope is Y 89, there are 14 other artificial isotopes. Chemically resembles the… …   Elements of periodic system

  • Yttrium 90 — L yttrium 90, noté 90Y, est l isotope de l yttrium dont le nombre de masse est égal à 90 : son noyau atomique compte 39 protons et 51 neutrons avec un spin 2 pour une masse atomique de 89,9071514 g/mol. Il est caractérisé par un défaut… …   Wikipédia en Français

  • Isotopes of strontium — The alkali earth metal strontium (Sr) has four stable, naturally occurring isotopes:84Sr (0.56%), 86Sr (9.86%), 87Sr (7.0%) and 88Sr (82.58%). Only 87Sr is radiogenic; it is produced by decay from the radioactive alkali metal 87Rb, which has a… …   Wikipedia

  • Abundances of the isotopes — ▪ Table Abundances of the isotopes element Z symbol A abundance   mass excess hydrogen 1 H 1 99.9885 7.289 2 0.0151 13.136 helium 2 He 3 0.000138 14.931 4 99.999863 2.425 lithium 3 Li 6 7.59 14.086 7 92.41 14.908 beryllium 4 Be 9 100  11.348… …   Universalium

  • Strontium-90 — Infobox isotope alternate names = symbol =Sr mass number =90 mass = num neutrons =52 num protons =38 abundance = halflife =28.8 years error halflife = background =#7F7 text color = decay product =isotopes of yttrium#90 decay symbol =Y decay mass …   Wikipedia

  • 7440-65-5 — Yttrium Yttrium Strontium …   Wikipédia en Français

  • rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”