Isotopes of ytterbium
List of isotopes
Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Believed to undergo α decay to ¹⁶⁴Er or β⁺β⁺ decay to ¹⁶⁸Er with a half-life over 130×10¹² years Believed to undergo α decay to ¹⁶⁶Er Believed to undergo α decay to ¹⁶⁷Er Believed to undergo α decay to ¹⁶⁸Er Believed to undergo α decay to ¹⁶⁹Er Believed to undergo α decay to ¹⁷⁰Er Believed to undergo α decay to ¹⁷²Er or β−β− decay to ¹⁷⁶Hf with a half-life over 160×10¹⁵ years Cluster decay daughter of ²³²Th

Isotopes of ytterbium

Section Title: List of isotopes
Table Section Text: Abbreviations: EC: Electron capture IT: Isomeric transition Bold for stable isotopes Believed to undergo α decay to ¹⁶⁴Er or β⁺β⁺ decay to ¹⁶⁸Er with a half-life over 130×10¹² years Believed to undergo α decay to ¹⁶⁶Er Believed to undergo α decay to ¹⁶⁷Er Believed to undergo α decay to ¹⁶⁸Er Believed to undergo α decay to ¹⁶⁹Er Believed to undergo α decay to ¹⁷⁰Er Believed to undergo α decay to ¹⁷²Er or β−β− decay to ¹⁷⁶Hf with a half-life over 160×10¹⁵ years Cluster decay daughter of ²³²Th

Nuclide symbol	Z(p)	N(n)	Isotopic mass (u)	Half-life	Decay mode(s)	Daughter isotope(s)	Nuclear spin and parity	Representative isotopic composition (mole fraction)	Range of natural variation (mole fraction)

Excitation energy

148Yb	70	78	147.96742(64)#	250# ms	β+	148Tm	0+

149Yb	70	79	148.96404(54)#	0.7(2) s	β+	149Tm	(1/2+,3/2+)

150Yb	70	80	149.95842(43)#	700# ms [>200 ns]	β+	150Tm	0+

151Yb	70	81	150.95540(32)	1.6(5) s	β+	151Tm	(1/2+)

β+, p (rare)	150Er

151m1Yb	750(100)# keV	1.6(5) s	β+	151Tm	(11/2−)

β+, p (rare)	150Er

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	β+	152Tm	0+

β+, p (rare)	151Er

153Yb	70	83	152.94948(21)#	4.2(2) s	α (50%)	149Er	7/2−#

β+ (50%)	153Tm

β+, p (.008%)	152Er

153mYb	2700(100) keV	15(1) µs	(27/2−)

154Yb	70	84	153.946394(19)	0.409(2) s	α (92.8%)	150Er	0+

β+ (7.119%)	154Tm

155Yb	70	85	154.945782(18)	1.793(19) s	α (89%)	151Er	(7/2−)

β+ (11%)	155Tm

156Yb	70	86	155.942818(12)	26.1(7) s	β+ (90%)	156Tm	0+

α (10%)	152Er

157Yb	70	87	156.942628(11)	38.6(10) s	β+ (99.5%)	157Tm	7/2−

α (.5%)	153Er

158Yb	70	88	157.939866(9)	1.49(13) min	β+ (99.99%)	158Tm	0+

α (.0021%)	154Er

159Yb	70	89	158.94005(2)	1.67(9) min	β+	159Tm	5/2(−)

160Yb	70	90	159.937552(18)	4.8(2) min	β+	160Tm	0+

161Yb	70	91	160.937902(17)	4.2(2) min	β+	161Tm	3/2−

162Yb	70	92	161.935768(17)	18.87(19) min	β+	162Tm	0+

163Yb	70	93	162.936334(17)	11.05(25) min	β+	163Tm	3/2−

164Yb	70	94	163.934489(17)	75.8(17) min	EC	164Tm	0+

165Yb	70	95	164.93528(3)	9.9(3) min	β+	165Tm	5/2−

166Yb	70	96	165.933882(9)	56.7(1) h	EC	166Tm	0+

167Yb	70	97	166.934950(5)	17.5(2) min	β+	167Tm	5/2−

168Yb	70	98	167.933897(5)	Observationally Stable	0+	0.0013(1)

169Yb	70	99	168.935190(5)	32.026(5) d	EC	169Tm	7/2+

169mYb	24.199(3) keV	46(2) s	IT	169Yb	1/2−

170Yb	70	100	169.9347618(26)	Observationally Stable	0+	0.0304(15)

170mYb	1258.46(14) keV	370(15) ns	4−

171Yb	70	101	170.9363258(26)	Observationally Stable	1/2−	0.1428(57)

171m1Yb	95.282(2) keV	5.25(24) ms	IT	171Yb	7/2+

171m2Yb	122.416(2) keV	265(20) ns	5/2−

172Yb	70	102	171.9363815(26)	Observationally Stable	0+	0.2183(67)

173Yb	70	103	172.9382108(26)	Observationally Stable	5/2−	0.1613(27)

173mYb	398.9(5) keV	2.9(1) µs	1/2−

174Yb	70	104	173.9388621(26)	Observationally Stable	0+	0.3183(92)

175Yb	70	105	174.9412765(26)	4.185(1) d	β−	175Lu	7/2−

175mYb	514.865(4) keV	68.2(3) ms	1/2−

176Yb	70	106	175.9425717(28)	Observationally Stable	0+	0.1276(41)

176mYb	1050.0(3) keV	11.4(3) s	(8)−

177Yb	70	107	176.9452608(28)	1.911(3) h	β−	177Lu	(9/2+)

177mYb	331.5(3) keV	6.41(2) s	IT	177Yb	(1/2−)

178Yb	70	108	177.946647(11)	74(3) min	β−	178Lu	0+

179Yb	70	109	178.95017(32)#	8.0(4) min	β−	179Lu	(1/2−)

180Yb	70	110	179.95233(43)#	2.4(5) min	β−	180Lu	0+

181Yb	70	111	180.95615(43)#	1# min	β−	181Lu	3/2−#

182Yb	70	112	> 160 ns	β−	182Lu	0+

Sentence(s)

Isotopes ¹⁶⁹Yb had a half-life of 32.026 days, ¹⁷⁵Yb with a half-life of 4.185 days and ¹⁶⁶Yb with a half-life of 56.7 hours.

final_sentence: Isotopes ¹⁶⁹Yb had a half-life of 32.026 days, ¹⁷⁵Yb with a half-life of 4.185 days and ¹⁶⁶Yb with a half-life of 56.7 hours.