Terbium-159
Properties and data of the isotope 159Tb.
See also: List of individual Terbium isotopes (and general data sources).
General data
Name of the isotope:Terbium-159; Tb-159Symbol:159Tb or 15965TbMass number A:159 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:94Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.4461538461538 (= neutron-proton ratio)Neutron excess (N-Z):29Isotopic mass:158.92535(2) u (atomic weight of Terbium-159)Nuclide mass:158.8896953 u (calculated nuclear mass without electrons)Mass excess:-69.53603 MeVMass defect:1.397779184 u (per nucleus)Nuclear binding energy:1302.02292322 MeV (per nucleus)
8.18882342 MeV (average binding energy per nucleon)Separation energy:SN = 8.1330(6) MeV (first neutron)
SP = 6.1318(8) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2+Magnetic dipole moment:μ(μN) = + 2.014(4)Charge radius:5.0600(1500) femtometer fmYear of discovery:1933
Parent Nuclides
Direct parent isotopes are: 159Dy, 159Gd.
Occurrence
Comparison of the natural Terbium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
| | Atomic Mass ma | Quantity | Half-life | Spin |
|---|
Terbium
Isotopic mixture | 158.925354 u | 100 % | | |
| Isotope 159Tb | 158.92535(2) u | 100 % | stable | 3/2+ |
NMR data
Nuclear magnetic properties and parameters of the NMR active Nuclide 159Tb
Isotope:159Tb-NMRQuantity:100 %Spin:3/2+Nuclearmagnetic moment
μ/μN:+ 2.014(4)Gyromagnetic ratio γ:6.4306 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.3426666666667Quadrupole moment Q:+ 1.432(8) barn (100 fm2)Resonance frequency:v0 = 10.23 MHz at 1 TRelative Sensitivity:[related to 1H = 1.000]:
0.06945 (H0 = const.)
1.2019 (v0 = const.)
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 94) and isobaric (same nucleon number A = 159) with Terbium-159. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 94 | Isobar A = 159 |
|---|
| 54 | 148Xe | |
| 55 | 149Cs | |
| 56 | 150Ba | |
| 57 | 151La | |
| 58 | 152Ce | 159Ce |
| 59 | 153Pr | 159Pr |
| 60 | 154Nd | 159Nd |
| 61 | 155Pm | 159Pm |
| 62 | 156Sm | 159Sm |
| 63 | 157Eu | 159Eu |
| 64 | 158Gd | 159Gd |
| 65 | 159Tb | 159Tb |
| 66 | 160Dy | 159Dy |
| 67 | 161Ho | 159Ho |
| 68 | 162Er | 159Er |
| 69 | 163Tm | 159Tm |
| 70 | 164Yb | 159Yb |
| 71 | 165Lu | 159Lu |
| 72 | 166Hf | 159Hf |
| 73 | 167Ta | 159Ta |
| 74 | 168W | 159W |
| 75 | 169Re | 159Re |
| 76 | 170Os | |
| 77 | 171Ir | |
| 78 | 172Pt | |
| 79 | 173Au | |
| 80 | 174Hg | |
External data and identifiers
Last update: 2020-10-08
Perma link: https://www.chemlin.org/isotope/terbium-159
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