Lutetium-158
Properties and data of the isotope 158Lu.
See also: list of Lutetium isotopes.
General data
Name of the isotope:Lutetium-158; Lu-158Symbol:158Lu or 15871LuMass number A:158 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:87Isotopic mass:157.949316(16) u (atomic weight of Lutetium-158)
Excitation energy: ≥ 0 keVNuclide mass:157.9103705 u (calculated nuclear mass without electrons)Mass excess:-47.21184 MeVMass defect:1.360108964 u (per nucleus)Nuclear binding energy:1266.93333931 MeV (per nucleus)
8.01856544 MeV (average binding energy per nucleon)Half-life:10.6(3) sDecay constant λ:0.065391243449051 s-1Specific activity α:2.508250185073 × 10+20 Bq g-1
6779054554.2538 Ci g-1Spin and parity:
(nuclear angular momentum)(2)-Year of discovery:1979
Radioactive Decay
Half-life T½ = 10.6(3) s respectively 1.06 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
α | 154Tm | 0.91(20) % | | |
EC/β+ | 158Yb | 99.09(10) % | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 87) and isobaric (same nucleon number A = 158) with Lutetium-158. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 87 | Isobar A = 158 |
49 | 136In | |
50 | 137Sn | |
51 | 138Sb | |
52 | 139Te | |
53 | 140I | |
54 | 141Xe | |
55 | 142Cs | |
56 | 143Ba | |
57 | 144La | |
58 | 145Ce | |
59 | 146Pr | 158Pr |
60 | 147Nd | 158Nd |
61 | 148Pm | 158Pm |
62 | 149Sm | 158Sm |
63 | 150Eu | 158Eu |
64 | 151Gd | 158Gd |
65 | 152Tb | 158Tb |
66 | 153Dy | 158Dy |
67 | 154Ho | 158Ho |
68 | 155Er | 158Er |
69 | 156Tm | 158Tm |
70 | 157Yb | 158Yb |
71 | 158Lu | 158Lu |
72 | 159Hf | 158Hf |
73 | 160Ta | 158Ta |
74 | 161W | 158W |
75 | 162Re | |
76 | 163Os | |
77 | 164Ir | |
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/lutetium-158
© 1996 - 2025 ChemLin