Ytterbium-155
Properties and data of the isotope 155Yb.
See also: list of Ytterbium isotopes.
General data
Name of the isotope:Ytterbium-155; Yb-155Symbol:155Yb or 15570YbMass number A:155 (= number of nucleons)Atomic number Z:70 (= number of protons)Neutrons N:85Isotopic mass:154.945783(18) u (atomic weight of Ytterbium-155)Nuclide mass:154.9073859 u (calculated nuclear mass without electrons)Mass excess:-50.50281 MeVMass defect:1.3384871 u (per nucleus)Nuclear binding energy:1246.79270273 MeV (per nucleus)
8.04382389 MeV (average binding energy per nucleon)Separation energy:SN = 8.642(24) MeV (first neutron)
SP = 3.364(22) MeV (first proton)Half-life:1.793(19) sDecay constant λ:0.38658515368653 s-1Specific activity α:1.511733928480 × 10+21 Bq g-1
40857673742.727 Ci g-1Spin and parity:
(nuclear angular momentum)(7/2-)Magnetic dipole moment:μ(μN) = - 0.913(22)Quadrupole moment Q:- 0.5(3) barn (100 fm2)Nuclear g-factor:gl = -0.26085714285714Charge radius:5.104(11) femtometer fmYear of discovery:1964
Radioactive Decay
Half-life T½ = 1.793(19) s.
| Decay mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EE/β+ | 155Tm | 11(4) % | 6.123(19) MeV | |
| α | 151Er | 89(4) % | 5.3388(21) MeV | |
Parent Nuclides
Direct parent isotope is: 159Hf.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 85) and isobaric (same nucleon number A = 155) with Ytterbium-155. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| OZ | Isotone N = 85 | Isobar A = 155 |
|---|
| 47 | 132Ag | |
| 48 | 133Cd | |
| 49 | 134In | |
| 50 | 135Sn | |
| 51 | 136Sb | |
| 52 | 137Te | |
| 53 | 138I | |
| 54 | 139Xe | |
| 55 | 140Cs | |
| 56 | 141Ba | |
| 57 | 142La | 155La |
| 58 | 143Ce | 155Ce |
| 59 | 144Pr | 155Pr |
| 60 | 145Nd | 155Nd |
| 61 | 146Pm | 155Pm |
| 62 | 147Sm | 155Sm |
| 63 | 148Eu | 155Eu |
| 64 | 149Gd | 155Gd |
| 65 | 150Tb | 155Tb |
| 66 | 151Dy | 155Dy |
| 67 | 152Ho | 155Ho |
| 68 | 153Er | 155Er |
| 69 | 154Tm | 155Tm |
| 70 | 155Yb | 155Yb |
| 71 | 156Lu | 155Lu |
| 72 | 157Hf | 155Hf |
| 73 | 158Ta | 155Ta |
| 74 | 159W | |
| 75 | 160Re | |
| 76 | 161Os | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/ytterbium-155
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