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Isotopes of Ytterbium

List, data and properties of all known isotopes of Ytterbium as well as radioactive decay products and intermediate products.

 

Ytterbium isotopes

All atomic nuclei of the chemical element ytterbium are summarized under ytterbium isotopes; these all consist of an atomic nucleus with 70 protons and, in the uncharged state, 70 electrons. The difference between each ytterbium isotope is based on the number of neutrons in the nucleus.

 

Naturally Occurring Ytterbium Isotopes

Natural ytterbium deposits are composed of a total of seven different, stable isotopes:

Atomic Mass maQuantityHalf-lifeSpin
Ytterbium
Isotopic mixture
173,045 u100 %
Isotope 168Yb167,93389(2) u0,126(1) %stable0+
Isotope 170Yb169,93477(2) u3,023(2) %stable0+
Isotope 171Yb170,93633(2) u14,216(7) %stable1/2-
Isotope 172Yb171,93639(2) u21,754(10) %stable0+
Isotope 173Yb172,93822(2) u16,098(9) %stable5/2-
Isotope 174Yb173,93887(2) u31,896(26) %stable0+
Isotope 176Yb175,94258(2) u12,887(30) %stable0+

 

All other known and characterized ytterbium nuclides are unstable.

 

Isotope Table: Ytterbium

 

Atomic Properties

Isotope
Nuclide
ZANNameAtomic Mass
[Nuclear Mass]
{Mass Excess}
Spin I
(h/2π)
μParent
123456789
148Yb7014878Ytterbium-148147.96742(64) u
[147.9290229 u]
{-30.34807 MeV}
0+
149Yb7014979Ytterbium-149148.96436(32) u
[148.9259629 u]
{-33.19845 MeV}
(1/2+,3/2+)150Lu
150Yb7015080Ytterbium-150149.95852(32) u
[149.9201229 u]
{-38.63837 MeV}
0+151Lu
151Yb7015181Ytterbium-151150.95540(32) u
[150.9170029 u]
{-41.54463 MeV}
(1/2+)
151m1Yb7015181Ytterbium-151m1150.95540(32) u
[150.9170029 u]
{-41.54463 MeV}
(11/2-)
151m2Yb7015181Ytterbium-151m2150.95540(32) u
[150.9170029 u]
{-41.54463 MeV}
151m3Yb7015181Ytterbium-151m3150.95540(32) u
[150.9170029 u]
{-41.54463 MeV}
(27/2-)
152Yb7015282Ytterbium-152151.95033(16) u
[151.9119329 u]
{-46.26731 MeV}
0+152Lu
156Hf
153Yb7015383Ytterbium-153152.94932(21) u
[152.9109229 u]
{-47.20812 MeV}
7/2-- 1.05(3)153Lu
157Hf
154Yb7015484Ytterbium-154153.946396(19) u
[153.9079989 u]
{-49.9318 MeV}
0+154Lu
158Hf
155Yb7015585Ytterbium-155154.945783(18) u
[154.9073859 u]
{-50.50281 MeV}
(7/2-)- 0.913(22)159Hf
156Yb7015686Ytterbium-156155.942817(10) u
[155.9044199 u]
{-53.26562 MeV}
0+160Hf
157Yb7015787Ytterbium-157156.942649(12) u
[156.9042519 u]
{-53.42211 MeV}
7/2-- 0.639(8)161Hf
157Lu
158Yb7015888Ytterbium-158157.939871(9) u
[157.9014739 u]
{-56.0098 MeV}
0+162Hf
158Lu
159Yb7015989Ytterbium-159158.940055(19) u
[158.9016579 u]
{-55.83841 MeV}
5/2(-)- 0.366(8)159Lu
160Yb7016090Ytterbium-160159.937560(8) u
[159.8991629 u]
{-58.16249 MeV}
0+160Lu
161Yb7016191Ytterbium-161160.937907(16) u
[160.8995099 u]
{-57.83926 MeV}
3/2-- 0.327(8)161Lu
162Yb7016292Ytterbium-162161.935774(16) u
[161.8973769 u]
{-59.82613 MeV}
0+162Lu
163Yb7016393Ytterbium-163162.936340(16) u
[162.8979429 u]
{-59.29891 MeV}
3/2-- 0.374(8)163Lu
164Yb7016494Ytterbium-164163.934495(16) u
[163.8960979 u]
{-61.01751 MeV}
0+164Lu
165Yb7016595Ytterbium-165164.935270(28) u
[164.8968729 u]
{-60.29561 MeV}
5/2-+ 0.478(8)165Lu
166Yb7016696Ytterbium-166165.933874(8) u
[165.8954769 u]
{-61.59597 MeV}
0+166Lu
167Yb7016797Ytterbium-167166.934953(4) u
[166.8965559 u]
{-60.59089 MeV}
5/2-+ 0.623(8)167Lu
168Yb7016898Ytterbium-168167.93389(2) u
[167.8954929 u]
{-61.58107 MeV}
0+168Lu
168
169Yb7016999Ytterbium-169168.9351820(13) u
[168.8967849 u]
{-60.37758 MeV}
7/2+- 0.635(8)169Lu
169mYb7016999Ytterbium-169m168.9351820(13) u
[168.8967849 u]
{-60.37758 MeV}
1/2-+ 0.507(8)
170Yb70170100Ytterbium-170169.93477(2) u
[169.8963729 u]
{-60.76135 MeV}
0+170Lu
170Tm
174Hf
170mYb70170100Ytterbium-170m169.93477(2) u
[169.8963729 u]
{-60.76135 MeV}
4-
171Yb70171101Ytterbium-171170.93633(2) u
[170.8979329 u]
{-59.30822 MeV}
1/2-+ 0.49367(1)171Lu
171Tm
171m1Yb70171101Ytterbium-171m1170.93633(2) u
[170.8979329 u]
{-59.30822 MeV}
7/2+
171m1Yb70171101Ytterbium-171m1170.93633(2) u
[170.8979329 u]
{-59.30822 MeV}
5/2-
172Yb70172102Ytterbium-172171.93639(2) u
[171.8979929 u]
{-59.25233 MeV}
0+172Lu
172Tm
173Yb70173103Ytterbium-173172.93822(2) u
[172.8998229 u]
{-57.5477 MeV}
5/2-- 0.67989(3)173Lu
173Tm
174Yb70174104Ytterbium-174173.93887(2) u
[173.9004729 u]
{-56.94223 MeV}
0+174Lu
174Tm
175Yb70175105Ytterbium-175174.94128191(8) u
[174.9028848 u]
{-54.69555 MeV}
(7/2-)0.58(8)175Tm
175mYb70175105Ytterbium-175m174.94128191(8) u
[174.9028848 u]
{-54.69555 MeV}
1/2-
176Yb70176106Ytterbium-176175.94258(2) u
[175.9041829 u]
{-53.48639 MeV}
0+176Lu
176Tm
176mYb70176106Ytterbium-176m175.94258(2) u
[175.9041829 u]
{-53.48639 MeV}
8-
177Yb70177107Ytterbium-177176.94526385(24) u
[176.9068668 u]
{-50.9864 MeV}
9/2+-0.695(15)
177mYb70177107Ytterbium-177m176.94526385(24) u
[176.9068668 u]
{-50.9864 MeV}
(1/2-)+0.151(15)
178Yb70178108Ytterbium-178177.946650(11) u
[177.9082529 u]
{-49.6952 MeV}
0+
179Yb70179109Ytterbium-179178.95004(21) u
[178.9116429 u]
{-46.53744 MeV}
(1/2-)
180Yb70180110Ytterbium-180179.95212(32) u
[179.9137229 u]
{-44.59993 MeV}
0+
181Yb70181111Ytterbium-181180.95589(32) u
[180.9174929 u]
{-41.0882 MeV}
182Yb70182112Ytterbium-182181.95832(43) u
[181.9199229 u]
{-38.82467 MeV}
0+
183Yb70183113Ytterbium-183182.96232(43) u
[182.9239229 u]
{-35.09869 MeV}
184Yb70184114Ytterbium-184183.96507(54) u
[183.9266729 u]
{-32.53709 MeV}
0+
185Yb70185115Ytterbium-185184.96940(54) u
[184.9310029 u]
{-28.50372 MeV}

 

Radioactive Decay Properties

IsotopeRadioactive DecayAEExtern
Half-lifeDecay ModeProbabilityEnergy
1101112131415
Yb-148250 msEC/β+148Tm?AL
Yb-1490.7(2) sEC/β+149Tm
EC, p → 148Er
100 %
?
10.68(36) MeV
AL
Yb-150200 nsAL
Yb-1511.6(1) sEC/β+151Tm
EC, p → 150Er
< 100 %
> 0 %
9.23(30) MeV
AL
Yb-151m11.6(1) sEC/β+151Tm
EC, p → 150Er
Iso → 151Yb
< 100 %
?
ca. 0.4 %


+x keV
Yb-151m22.6(7) μsIso → 151Ybca. 100 %+y kev
Yb-151m320(1) μsIso → 151Yb100 %+z keV
Yb-1523.03(6) sEC/β+152Tm
β+, p → 151Er
< 100 %
?
5.45(16) MeV
AL
Yb-1534.2(2) sEC/β+153Tm
α → 149Er
β+, p 152Er
~ 40 %
~ 60 %
0.008 %
6.77(20) MeV
4.11(20) MeV
AL
Yb-1540.409(2) sEC/β+154Tm
α → 150Er
7.4(12) %
92.6(12) %
4.495(23) MeV
5.4743(17) MeV
AL
Yb-1551.793(19) sEC/β+155Tm
α → 151Er
11(4) %
89(4) %
6.123(19) MeV
5.3388(21) MeV
AL
Yb-15626.1(7) sEC/β+156Tm
α → 152Er
90(2) %
10(2) %
3.569(17) MeV
4.810(4) MeV
AL
Yb-15738.6(10) sEC/β+157Tm
α → 153Er
99.5 %
0.5 %
5.29(3) MeV
4.622(6) MeV
AL
Yb-1581.49(13) minEC/β+158Tm
α → 154Er
99.9979 %
ca. 0.0021 %
2.693(26) MeV
4.170(7) MeV
AL
Yb-1591.67(9) minEC/β+159Tm100 %4.73(3) MeVAL
Yb-1604.8(2) minEC/β+160Tm100 %2.14(4) MeVAL
Yb-1614.2(2) minEC/β+161Tm100 %4.06(3) MeVAL
Yb-16218.87(19) minEC/β+162Tm100 %1.65(3) MeVAL
Yb-16311.05(35) minEC/β+163Tm100 %3.430(16) MeVAL
Yb-16475.8(17) minEC → 164Tm100 %0.887(29) MeVAL
Yb-1659.9(3) minEC/β+165Tm100 %2.634(27) MeVAL
Yb-16656.7(1) hEC → 166Tm100 %0.293(14) MeVAL
Yb-16717.5(2) minEC/β+167Tm100 %1.953(4) MeVAL
Yb-168stableAL
Yb-16932.018(5) dEC → 169Tm100 %0.8976(15) MeVAL
Yb-169m46(2) sIso → 169Yb100 %24.1999(16) keV
Yb-170stableAL
Yb-170m370(15) ns1258.46(14) keV
Yb-171stableAL
Yb-171m1Iso → 171Yb100 %95.282(2) keV
Yb-171m2265(20) ns122.416(2) keV
Yb-172stableAL
Yb-173stableAL
Yb-174stableAL
Yb-1754.185(1) dβ-175Lu100 %0.4700(12) MeVAL
Yb-175m68.2(3) ms514.866(4) keV
Yb-176stableAL
Yb-176m11.4(3) sIso → 176Yb100 %1049.8(6) keV
Yb-1771.911(3) hβ-177Lu100 %1.3974(12) MeVAL
Yb-177m6.41(2) sIso → 177Yb100 %331.5(3) keV
Yb-17874(3) minβ-178Lu100 %0.642(10) MeVAL
Yb-1798.0(4) minβ-179Lu100 %2.52(20) MeVAL
Yb-1802.4(5) minβ-180Lu100 %2.08(31) MeVAL
Yb-181160 nsβ-181Lu?3.71(32) MeVAL
Yb-182160 nsβ-182Lu?3.06(45) MeV
Yb-183222 nsβ-183Lu100 %4.62(41) MeV
Yb-184160 nsβ-184Lu?3.87(58) MeV
Yb-185160 nsβ-185Lu?5.39(58) MeV

 

Notes (related to the columns):

1 - nuclide, isotope symbol.
2 - Z = number of protons (atomic number).
3 - Mass number A.
4 - N = number of neutrons.
5 - Identification of the Ytterbium isotope.
6 - Relative atomic mass of the Ytterbium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
7 - Nuclear spin I, unit: h/2π.
8 - Nuclear magnetic moment μmag.
9 - Source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
10 - Decay: Half-live of the Ytterbium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
11 - Decay: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
12 - Decay percentage in percent (%).
13 - Decay energy; Particle energy related to decay type.
14 - AE = Excitation energy for metastable nuclei.
15 - Other information and notes: AL = Adopted Levels (link to external data [1]).

Miscellaneous:

()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
  - unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.

 

NMR active Ytterbium nuclides

Nuclide
quantity 1)
spin
Nuclear magnetic
moment
μ/μN
Gyromagnetic
ratio
107 rad T-1 s-1
Quadrupole
moment
Q fm-2
Resonant
frequency
v0 bei 1 T
Relative
sensitivity
H0 = const.
v0 = const. 2)
171Yb
14,216(7) %
1/2-
+ 0,49367(1)4,73487,52610,00552
0,1768
173Yb
16,098(9) %
5/2-
- 0,67989(3)- 1,3025+ 280,0(40)

1) Quantity Percentage of natural occurrence.

2) Related to 1H = 1,000.

 

Radiation Protection

According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Ytterbium radionuclides:

NuclideLimit ValueHASS limitSCDaughter NuclidesHalf-life
Yb-162107 Bq100 Bq/g18.9 min
Yb-166+107 Bq100 Bq/g56.7 h
Yb-167106 Bq100 Bq/g17.5 min
Yb-169107 Bq10 Bq/g0,3 TBq32.0 d
Yb-175107 Bq100 Bq/g2 TBq100 Bq cm-24.2 d
Yb-177106 Bq100 Bq/g1.9 h
Yb-178+106 Bq1000 Bq/g74.0 min

(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)

 

Literature Sources and References

Properties of the Ytterbium nucleides

[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.

[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.

[3] - Live Chart of Nuclides. Nuclear structure and decay data.

Ytterbium: NMR properties - 171Yb-NMR, 173Yb-NMR

[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.

[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.

[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.

[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).

More sources:

[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.

[9] - C. Fry, M. Thoennessen:
Discovery of dysprosium, holmium, erbium, thulium and ytterbium isotopes.
In: Atomic Data and Nuclear Data Tables, (2012), DOI 10.1016/j.adt.2012.05.004.

 


Category: Isotopes

Last update: 05.07.2020



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