Lutetium-176
Properties and data of the isotope 176Lu.
See also: list of Lutetium isotopes.
General data
Name of the isotope:Lutetium-176; Lu-176Symbol:176Lu or 17671LuMass number A:176 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:105Isotopic mass:175.94269(2) u (atomic weight of Lutetium-176)Nuclide mass:175.9037445 u (calculated nuclear mass without electrons)Mass excess:-53.38392 MeVMass defect:1.522703452 u (per nucleus)Nuclear binding energy:1418.38912932 MeV (per nucleus)
8.05902914 MeV (average binding energy per nucleon)Separation energy:SN = 6.28797(15) MeV (first neutron)
SP = 5.9757(12) MeV (first proton)Half-life:3.76(7) × 1010 aDecay constant λ:5.845625773853 × 10-19 s-1Specific activity α:2011.6103899784 Bq g-1
5.436784837779 × 10-8 Ci g-1Spin and parity:
(nuclear angular momentum)7-Magnetic dipole moment:μ(μN) = + 3.1692(45)Charge radius:5.3739(304) femtometer fmYear of discovery:1935
Radioactive Decay
Half-life T½ = 3.76(7) × 1010 a respectively 1.1857536 × 1018 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 176Hf | 100 % | 1.1941(9) MeV | |
Lutetium-176 gamma radiation
| Eγ | Iγ | Dose (MeV/Bq-s) |
|---|
| 88.34(3) keV | 14.5(6) % | 0.0128(5) |
| 201.83(3) keV | 78.0(25) % | 0.157(5) |
| 306.78(4) keV | 93.6 % | 0.287(5) |
| 400.99(4) keV | 0.37(4) % | 0.00150(15) |
Occurrence
Comparison of the natural Lutetium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| | Atomic Mass ma | Quantity | Half-life | Spin |
|---|
Lutetium
Isotopic mixture | 174.9668 u | 100 % | | |
| Isotope 175Lu | 174.94078(2) u | 97.401(13) % | stable | 7/2+ |
| Isotope 176Lu | 175.94269(2) u | 2.599(13) % | 3.76(7) × 1010 a | 7- |
NMR data
Nuclear magnetic properties of the NMR active Nuclide 176Lu
Isotope:176Lu-NMRQuantity:2.599(13) %Spin:7-Nuclearmagnetic moment
μ/μN:+ 3.1692(45)Gyromagnetic ratio γ:4.7348 · 107 rad T-1 s-1Nuclear g-factor:gl = 0.45274285714286Quadrupole moment Q:+ 4.97(3) barn (100 fm2)Resonance frequency:v0 = 3.451 at 1 TRelative Sensitivity:0.03975 (H0 = const.)
6.0518 (v0 = const.)
[related to 1H = 1.000]
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 176mLu | 122.845(4) keV | 3.664(19) h | 1- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 105) and isobaric (same nucleon number A = 176) with Lutetium-176. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 105 | Isobar A = 176 |
|---|
| 63 | 168Eu | |
| 64 | 169Gd | |
| 65 | 170Tb | |
| 66 | 171Dy | |
| 67 | 172Ho | |
| 68 | 173Er | 176Er |
| 69 | 174Tm | 176Tm |
| 70 | 175Yb | 176Yb |
| 71 | 176Lu | 176Lu |
| 72 | 177Hf | 176Hf |
| 73 | 178Ta | 176Ta |
| 74 | 179W | 176W |
| 75 | 180Re | 176Re |
| 76 | 181Os | 176Os |
| 77 | 182Ir | 176Ir |
| 78 | 183Pt | 176Pt |
| 79 | 184Au | 176Au |
| 80 | 185Hg | 176Hg |
| 81 | 186Tl | 176Tl |
| 82 | 187Pb | |
| 83 | 188Bi | |
| 84 | 189Po | |
| 85 | 190At | |
External data and identifiers
CAS:14452-47-2InChI Key:OHSVLFRHMCKCQY-OUBTZVSYSA-NSMILES:[176Lu]PubChem:ID 167100Adopted Levels, Gammas:NuDat 176Lu
Literature and References
[1] - Mikael Hult, Tim Vidmar, Ulf Rosengård, Gerd Marissens, Guillaume Lutter, Namik Sahin:
Half-life measurements of lutetium-176 using underground HPGe-detectors.
In: Applied Radiation and Isotopes, (2014), DOI 10.1016/j.apradiso.2013.11.071.
Last update: 2023-06-10
Perma link: https://www.chemlin.org/isotope/lutetium-176
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