Isotopes of ytterbium

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Ytterbium (Yb)
Standard atomic mass: 173.04(3) u

[edit] 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
148Yb	70	78	147.96742(64)#	250# ms	0+
149Yb	70	79	148.96404(54)#	0.7(2) s	(1/2+,3/2+)
150Yb	70	80	149.95842(43)#	700# ms [>200 ns]	0+
151Yb	70	81	150.95540(32)	1.6(5) s	(1/2+)
151m1Yb	750(100)# keV			1.6(5) s	(11/2-)
151m2Yb	1790(500)# keV			2.6(7) µs	19/2-#
151m3Yb	2450(500)# keV			20(1) µs	27/2-#
152Yb	70	82	151.95029(22)	3.04(6) s	0+
153Yb	70	83	152.94948(21)#	4.2(2) s	7/2-#
153mYb	2700(100) keV			15(1) µs	(27/2-)
154Yb	70	84	153.946394(19)	0.409(2) s	0+
155Yb	70	85	154.945782(18)	1.793(19) s	(7/2-)
156Yb	70	86	155.942818(12)	26.1(7) s	0+
157Yb	70	87	156.942628(11)	38.6(10) s	7/2-
158Yb	70	88	157.939866(9)	1.49(13) min	0+
159Yb	70	89	158.94005(2)	1.67(9) min	5/2(-)
160Yb	70	90	159.937552(18)	4.8(2) min	0+
161Yb	70	91	160.937902(17)	4.2(2) min	3/2-
162Yb	70	92	161.935768(17)	18.87(19) min	0+
163Yb	70	93	162.936334(17)	11.05(25) min	3/2-
164Yb	70	94	163.934489(17)	75.8(17) min	0+
165Yb	70	95	164.93528(3)	9.9(3) min	5/2-
166Yb	70	96	165.933882(9)	56.7(1) h	0+
167Yb	70	97	166.934950(5)	17.5(2) min	5/2-
168Yb	70	98	167.933897(5)	STABLE [>130E+12 a]	0+	0.0013(1)
169Yb	70	99	168.935190(5)	32.026(5) d	7/2+
169mYb	24.199(3) keV			46(2) s	1/2-
170Yb	70	100	169.9347618(26)	STABLE	0+	0.0304(15)
170mYb	1258.46(14) keV			370(15) ns	4-
171Yb	70	101	170.9363258(26)	STABLE	1/2-	0.1428(57)
171m1Yb	95.282(2) keV			5.25(24) ms	7/2+
171m2Yb	122.416(2) keV			265(20) ns	5/2-
172Yb	70	102	171.9363815(26)	STABLE	0+	0.2183(67)
173Yb	70	103	172.9382108(26)	STABLE	5/2-	0.1613(27)
173mYb	398.9(5) keV			2.9(1) µs	1/2-
174Yb	70	104	173.9388621(26)	STABLE	0+	0.3183(92)
175Yb	70	105	174.9412765(26)	4.185(1) d	7/2-
175mYb	514.865(4) keV			68.2(3) ms	1/2-
176Yb	70	106	175.9425717(28)	STABLE [>160E+15 a]	0+	0.1276(41)
176mYb	1050.0(3) keV			11.4(3) s	(8)-
177Yb	70	107	176.9452608(28)	1.911(3) h	(9/2+)
177mYb	331.5(3) keV			6.41(2) s	(1/2-)
178Yb	70	108	177.946647(11)	74(3) min	0+
179Yb	70	109	178.95017(32)#	8.0(4) min	(1/2-)
180Yb	70	110	179.95233(43)#	2.4(5) min	0+
181Yb	70	111	180.95615(43)#	1# min	3/2-#

[edit] Notes

• Geologically exceptional samples are known in which the isotopic composition lies outside the reported range. The uncertainty in the atomic mass may exceed the stated value for such specimens.
• 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.

[edit] 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 thulium	Isotopes of ytterbium	Isotopes of lutetium
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