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Isotopes of hassium



Hassium (Hs) has no stable isotopes. A standard atomic mass cannot be given.

Additional recommended knowledge

Hassium has also been called hahnium, sergenium, and eka-osmium.

Table

nuclide
symbol
Z(p) N(n)  
isotopic mass (u)
 
half-life nuclear
spin
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
excitation energy
263Hs 108 155 263.12856(37)# 1# ms 7/2+#
264Hs 108 156 264.12839(5) 540(300) µs 0+
265Hs 108 157 265.13009(15)# 2.1(3) ms [2.0(+3-2) ms] 9/2+#
265mHs 300(70) keV 780(150) µs [0.75(+17-12) ms] 3/2+#
266Hs 108 158 266.13010(31)# 2.7(10) ms [2.3(+13-6) ms] 0+
267Hs 108 159 267.13179(11)# 32(15) ms 3/2+#
268Hs 108 160 268.13216(44)# 2# s 0+
269Hs 108 161 269.13406(13)# 27(17) s
270Hs 108 162 270.13465(31)# 3.6(+8-14) s 0+
271Hs 108 163 271.13766(36)# 40# s
272Hs 108 164 272.13905(62)# 40# s 0+
273Hs 108 165 273.14199(89)# 50# s (3/2+)#
274Hs 108 166 274.14313(70)# 1# min 0+
275Hs 108 167 275.14595(77)# 0.15(+27-6) s
276Hs 108 168 276.14721(89)# 1# h 0+
277Hs 108 169 277.14984(78)# 40(30) min 3/2+#

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 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 Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and 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. 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 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.


Isotopes of bohrium Isotopes of hassium Isotopes of meitnerium
Index to isotope pages
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_hassium". A list of authors is available in Wikipedia.
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