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Ytterbium-166

Properties and data of the isotope 166Yb.


Contents

See also: list of Ytterbium isotopes.

 

General data

Name of the isotope:Ytterbium-166; Yb-166Symbol:166Yb or 16670YbMass number A:166 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:96Isotopic mass:165.933874(8) u (atomic weight of Ytterbium-166)Nuclide mass:165.8954769 u (calculated nuclear mass without electrons)Mass excess:-61.59597 MeVMass defect:1.445710176 u (per nucleus)Nuclear binding energy:1346.67035468 MeV (per nucleus)
8.11247202 MeV (average binding energy per nucleon)
Separation energy:SN = 9.372(27) MeV (first neutron)
SP = 5.955(7) MeV (first proton)
Half-life:56.7(1) hDecay constant λ:3.395782777581 × 10-6 s-1Specific activity α:1.239386800990 × 10+16 Bq g-1
334969.40567311 Ci g-1
Spin and parity:
(nuclear angular momentum)
0+Charge radius:5.2525(57) femtometer fmYear of discovery:1954

 

Radioactive Decay

Half-life T½ = 56.7(1) h (hours) respectively 2.04120 × 105 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
EC166Tm100 %0.293(14) MeV

 

Parent Nuclides

Direct parent isotope is: 166Lu.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 96) and isobaric (same nucleon number A = 166) with Ytterbium-166. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 96Isobar A = 166
55151Cs
56152Ba
57153La
58154Ce
59155Pr
60156Nd
61157Pm
62158Sm166Sm
63159Eu166Eu
64160Gd166Gd
65161Tb166Tb
66162Dy166Dy
67163Ho166Ho
68164Er166Er
69165Tm166Tm
70166Yb166Yb
71167Lu166Lu
72168Hf166Hf
73169Ta166Ta
74170W166W
75171Re166Re
76172Os166Os
77173Ir166Ir
78174Pt166Pt
79175Au
80176Hg
81177Tl
82178Pb

 

External data and identifiers

Adopted Levels, Gammas:NuDat 166Yb

 


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Last update: 2020-10-11


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