Terbium-151
Properties and data of the isotope 151Tb.
See also: List of individual Terbium isotopes (and general data sources).
General data
Name of the isotope:Terbium-151; Tb-151Symbol:151Tb or 15165TbMass number A:151 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:86Isotopic mass:150.923109(4) u (atomic weight of Terbium-151)Nuclide mass:150.8874543 u (calculated nuclear mass without electrons)Mass excess:-71.62351 MeVMass defect:1.330700856 u (per nucleus)Nuclear binding energy:1239.53986316 MeV (per nucleus)
8.20887327 MeV (average binding energy per nucleon)Separation energy:SN = 8.589(8) MeV (first neutron)
SP = 3.149(7) MeV (first proton)Half-life:17.609(14) hDecay constant λ:1.093423155709 × 10-5 s-1Specific activity α:4.389832175465 × 10+16 Bq g-1
1186441.1285043 Ci g-1Spin and parity:
(nuclear angular momentum)1/2(+)Magnetic dipole moment:μ(μN) = 0.919(6)Nuclear g-factor:gl = 1.838Charge radius:4.963 femtometer fmYear of discovery:1953
Radioactive Decay
Half-life T½ = 17.609(14) h (hours) respectively 6.33924 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 151Gd | 99.9905(15) % | 2.565(5) MeV | |
| α | 147Eu | 0.0095(13) % | 3.496(4) MeV | |
Parent Nuclides
Direct parent isotope is: 151Dy.
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 |
|---|
| 151mTb | 99.53(5) keV | 25(3) s | (11/2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 86) and isobaric (same nucleon number A = 151) with Terbium-151. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 86 | Isobar A = 151 |
|---|
| 48 | 134Cd | |
| 49 | 135In | |
| 50 | 136Sn | |
| 51 | 137Sb | |
| 52 | 138Te | |
| 53 | 139I | |
| 54 | 140Xe | |
| 55 | 141Cs | 151Cs |
| 56 | 142Ba | 151Ba |
| 57 | 143La | 151La |
| 58 | 144Ce | 151Ce |
| 59 | 145Pr | 151Pr |
| 60 | 146Nd | 151Nd |
| 61 | 147Pm | 151Pm |
| 62 | 148Sm | 151Sm |
| 63 | 149Eu | 151Eu |
| 64 | 150Gd | 151Gd |
| 65 | 151Tb | 151Tb |
| 66 | 152Dy | 151Dy |
| 67 | 153Ho | 151Ho |
| 68 | 154Er | 151Er |
| 69 | 155Tm | 151Tm |
| 70 | 156Yb | 151Yb |
| 71 | 157Lu | 151Lu |
| 72 | 158Hf | |
| 73 | 159Ta | |
| 74 | 160W | |
| 75 | 161Re | |
| 76 | 162Os | |
External data and identifiers
Last update: 2020-10-08
Perma link: https://www.chemlin.org/isotope/terbium-151
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