My watch list
my.chemeurope.com  
Login  

Isotopes of californium



Californium (Cf) has no stable isotopes. A standard atomic mass cannot be given.

Additional recommended knowledge

Californium has also been called eka-dysprosium.

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
237Cf 98 139 237.06207(54)# 2.1(3) s 5/2+#
238Cf 98 140 238.06141(43)# 21.1(13) ms 0+
239Cf 98 141 239.06242(23)# 60(30) s [39(+37-12) s] 5/2+#
240Cf 98 142 240.06230(22)# 1.06(15) min 0+
241Cf 98 143 241.06373(27)# 3.78(70) min 7/2-#
242Cf 98 144 242.06370(4) 3.49(15) min 0+
243Cf 98 145 243.06543(15)# 10.7(5) min (1/2+)
244Cf 98 146 244.066001(3) 19.4(6) min 0+
245Cf 98 147 245.068049(3) 45.0(15) min (5/2+)
246Cf 98 148 246.0688053(22) 35.7(5) h 0+
247Cf 98 149 247.071001(9) 3.11(3) h (7/2+)#
248Cf 98 150 248.072185(6) 333.5(28) d 0+
249Cf 98 151 249.0748535(24) 351(2) a 9/2-
249mCf 144.98(5) keV 45(5) µs 5/2+
250Cf 98 152 250.0764061(22) 13.08(9) a 0+
251Cf 98 153 251.079587(5) 900(40) a 1/2+
252Cf 98 154 252.081626(5) 2.645(8) a 0+
253Cf 98 155 253.085133(7) 17.81(8) d (7/2+)
254Cf 98 156 254.087323(13) 60.5(2) d 0+
255Cf 98 157 255.09105(22)# 85(18) min (7/2+)
256Cf 98 158 256.09344(32)# 12.3(12) min 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 berkelium Isotopes of californium Isotopes of einsteinium
Index to isotope pages
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_californium". A list of authors is available in Wikipedia.
Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE