Ytterbium-169
Properties and data of the isotope 169Yb.
See also: list of Ytterbium isotopes.
General data
Name of the isotope:Ytterbium-169; Yb-169Symbol:169Yb or 16970YbMass number A:169 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:99Isotopic mass:168.9351820(13) u (atomic weight of Ytterbium-169)Nuclide mass:168.8967849 u (calculated nuclear mass without electrons)Mass excess:-60.37758 MeVMass defect:1.470396924 u (per nucleus)Nuclear binding energy:1369.66591232 MeV (per nucleus)
8.10453203 MeV (average binding energy per nucleon)Separation energy:SN = 6.86698(15) MeV (first neutron)
SP = 6.3536(19) MeV (first proton)Half-life:32.018(5) dDecay constant λ:2.505633335010 × 10-7 s-1Specific activity α:8.981712432610 × 10+14 Bq g-1
24274.898466515 Ci g-1Spin and parity:
(nuclear angular momentum)7/2+Magnetic dipole moment:μ(μN) = - 0.635(8)Quadrupole moment Q:+ 3.54(6) barn (100 fm2)Nuclear g-factor:gl = -0.18142857142857Charge radius:5.2771(56) femtometer fmYear of discovery:1946
Radioactive Decay
Half-life T½ = 32.018(5) d respectively 2.7663552 × 106 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC | 169Tm | 100 % | 0.8976(15) MeV | |
Parent Nuclides
Direct parent isotope is: 169Lu.
Nuclear Isomers
Nuclear isomers or excited states with the activation energy in keV related to the ground state.
| Nuclear Isomer | Excitation Energy | Half-life | Spin |
|---|
| 169mYb | 24.1999(16) keV | 46(2) s | 1/2- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 99) and isobaric (same nucleon number A = 169) with Ytterbium-169. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 99 | Isobar A = 169 |
|---|
| 57 | 156La | |
| 58 | 157Ce | |
| 59 | 158Pr | |
| 60 | 159Nd | |
| 61 | 160Pm | |
| 62 | 161Sm | |
| 63 | 162Eu | |
| 64 | 163Gd | 169Gd |
| 65 | 164Tb | 169Tb |
| 66 | 165Dy | 169Dy |
| 67 | 166Ho | 169Ho |
| 68 | 167Er | 169Er |
| 69 | 168Tm | 169Tm |
| 70 | 169Yb | 169Yb |
| 71 | 170Lu | 169Lu |
| 72 | 171Hf | 169Hf |
| 73 | 172Ta | 169Ta |
| 74 | 173W | 169W |
| 75 | 174Re | 169Re |
| 76 | 175Os | 169Os |
| 77 | 176Ir | 169Ir |
| 78 | 177Pt | 169Pt |
| 79 | 178Au | |
| 80 | 179Hg | |
| 81 | 180Tl | |
| 82 | 181Pb | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/ytterbium-169
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