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Lutetium-158

Properties and data of the isotope 158Lu.


Contents

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 keV
Nuclide 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-1
Spin 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
DaughterProbabilityDecay energyγ energy
(intensity)
α154Tm0.91(20) %
EC/β+158Yb99.09(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.

 

ZIsotone N = 87Isobar A = 158
49136In
50137Sn
51138Sb
52139Te
53140I
54141Xe
55142Cs
56143Ba
57144La
58145Ce
59146Pr158Pr
60147Nd158Nd
61148Pm158Pm
62149Sm158Sm
63150Eu158Eu
64151Gd158Gd
65152Tb158Tb
66153Dy158Dy
67154Ho158Ho
68155Er158Er
69156Tm158Tm
70157Yb158Yb
71158Lu158Lu
72159Hf158Hf
73160Ta158Ta
74161W158W
75162Re
76163Os
77164Ir

 


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Last update: 2020-10-11


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