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Terbium-159

Properties and data of the isotope 159Tb.

Content
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Terbium isotopes.

 

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:94Isotopic 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 maQuantityHalf-lifeSpin
Terbium
Isotopic mixture		158.925354 u100 %
Isotope 159Tb158.92535(2) u100 %stable3/2+

 

NMR data

Nuclear magnetic properties 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 at 1 TRelative Sensitivity:0.06945 (H0 = const.)
1.2019 (v0 = const.)
[related to 1H = 1.000]

 

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.

 

ZIsotone N = 94Isobar A = 159
54148Xe
55149Cs
56150Ba
57151La
58152Ce
59153Pr159Pr
60154Nd159Nd
61155Pm159Pm
62156Sm159Sm
63157Eu159Eu
64158Gd159Gd
65159Tb159Tb
66160Dy159Dy
67161Ho159Ho
68162Er159Er
69163Tm159Tm
70164Yb159Yb
71165Lu159Lu
72166Hf159Hf
73167Ta159Ta
74168W159W
75169Re159Re
76170Os
77171Ir
78172Pt
79173Au
80174Hg

 

External data and identifiers

Adopted Levels, Gammas:NuDat 159Tb

 

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Last update: 2020-10-08

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