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Isotopes of rutherfordium



Rutherfordium (Rf) has no stable isotopes. A standard atomic mass cannot be given.

Additional recommended knowledge

Rutherfordium has also been called dubnium and kurchatovium.

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
253Rf 104 149 253.10069(49)# 13(5) ms (7/2)(+#)
253mRf 200(150)# keV 52(14) µs [48(+17-10) µs] (1/2)(-#)
254Rf 104 150 254.10018(31)# 23(3) µs 0+
255Rf 104 151 255.10134(19)# 1.64(11) s (9/2-)#
255mRf -80(180)# keV 1.0(4) s [0.8(+5-2) s] 5/2+#
256Rf 104 152 256.101166(26) 6.45(14) ms 0+
257Rf 104 153 257.10299(11)# 4.7(3) s (1/2+)
257mRf 114(17) keV 3.9(4) s (11/2-)
258Rf 104 154 258.10349(22)# 12(2) ms 0+
259Rf 104 155 259.10564(8)# 2.8(4) s 7/2+#
260Rf 104 156 260.10644(22)# 21(1) ms 0+
261Rf 104 157 261.10877(3) 5.5(25) s 3/2+#
261mRf 70(100)# keV 81(9) s 9/2+#
262Rf 104 158 262.10993(30)# 2.3(4) s 0+
262mRf 600(400)# keV 47(5) ms high
263Rf 104 159 263.11255(20)# 11(3) min 3/2+#
264Rf 104 160 264.11399(48)# 1# h 0+
265Rf 104 161 265.11670(46)# 13 h 3/2+#
266Rf 104 162 266.11796(58)# 10# h 0+
267Rf 104 163 267.12153(62)# 5# h [2.3(+980-17) h]
268Rf 104 164 268.12364(76)# 1# h 0+

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 lawrencium Isotopes of rutherfordium Isotopes of dubnium
Index to isotope pages
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_rutherfordium". A list of authors is available in Wikipedia.
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