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Lutetium-176

Properties and data of the isotope 176Lu.


Content

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-1
Spin 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 modeDaughterProbabilityDecay energyγ energy
(intensity)
β-176Hf100 %1.1941(9) MeV

 

Lutetium-176 gamma radiation

EγIγDose (MeV/Bq-s)
88.34(3) keV14.5(6) %0.0128(5)
201.83(3) keV78.0(25) %0.157(5)
306.78(4) keV93.6 %0.287(5)
400.99(4) keV0.37(4) %0.00150(15)

 

Occurrence

Comparison of the natural Lutetium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Lutetium
Isotopic mixture
174.9668 u100 %
Isotope 175Lu174.94078(2) u97.401(13) %stable7/2+
Isotope 176Lu175.94269(2) u2.599(13) %3.76(7) × 1010 a7-

 

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 IsomerExcitation EnergyHalf-lifeSpin
176mLu122.845(4) keV3.664(19) h1-

 

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.

 

OZIsotone N = 105Isobar A = 176
63168Eu
64169Gd
65170Tb
66171Dy
67172Ho
68173Er176Er
69174Tm176Tm
70175Yb176Yb
71176Lu176Lu
72177Hf176Hf
73178Ta176Ta
74179W176W
75180Re176Re
76181Os176Os
77182Ir176Ir
78183Pt176Pt
79184Au176Au
80185Hg176Hg
81186Tl176Tl
82187Pb
83188Bi
84189Po
85190At

 

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 RosengÄrd, 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.

 


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Last update: 2023-06-10


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