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Lutetium-165

Properties and data of the isotope 165Lu.

Contents
General Data
Radioactive Decay
Parent Nuclides
Isotones und Isobares

See also: List of individual Lutetium isotopes (and general data sources).

 

General data

Name of the isotope:Lutetium-165; Lu-165Symbol:165Lu or 16571LuMass number A:165 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:94Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.3239436619718 (= neutron-proton ratio)Neutron excess (N-Z):23Isotopic mass:164.939407(28) u (atomic weight of Lutetium-165)Nuclide mass:164.9004615 u (calculated nuclear mass without electrons)Mass excess:-56.44202 MeVMass defect:1.430672376 u (per nucleus)Nuclear binding energy:1332.66273421 MeV (per nucleus)
8.07674384 MeV (average binding energy per nucleon)Separation energy:SN = 9.87(4) MeV (first neutron)
SP = 2.71(3) MeV (first proton)Half-life:10.74(10) minDecay constant λ:0.0010756473937926 s-1Specific activity α:3.949817146977 × 10+18 Bq g-1
106751814.78317 Ci g-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μN) = - 0.0245(3)Nuclear g-factor:gl = -0.049Charge radius:5.2830(307) femtometer fmYear of discovery:1973

 

Radioactive Decay

Half-life T½ = 10.74(10) min (minutes) respectively 6.444 × 102 seconds s.

Decay
mode		DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+165Yb100 %3.85(4) MeV

 

Parent Nuclides

Direct parent isotope is: 165Hf.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 94) and isobaric (same nucleon number A = 165) with Lutetium-165. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 94Isobar A = 165
54148Xe
55149Cs
56150Ba
57151La
58152Ce
59153Pr
60154Nd
61155Pm
62156Sm165Sm
63157Eu165Eu
64158Gd165Gd
65159Tb165Tb
66160Dy165Dy
67161Ho165Ho
68162Er165Er
69163Tm165Tm
70164Yb165Yb
71165Lu165Lu
72166Hf165Hf
73167Ta165Ta
74168W165W
75169Re165Re
76170Os165Os
77171Ir165Ir
78172Pt165Pt
79173Au
80174Hg

 

External data and identifiers

Adopted Levels, Gammas:NuDat 165Lu

 

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Last update: 2020-10-11

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