Terbium-152
Properties and data of the isotope 152Tb.
See also: List of individual Terbium isotopes (and general data sources).
General data
Name of the isotope:Terbium-152; Tb-152Symbol:152Tb or 15265TbMass number A:152 (= number of nucleons)Atomic number Z:65 (= number of protons)Neutrons N:87Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3384615384615 (= neutron-proton ratio)Neutron excess (N-Z):22Isotopic mass:151.92408(4) u (atomic weight of Terbium-152)Nuclide mass:151.8884253 u (calculated nuclear mass without electrons)Mass excess:-70.71902 MeVMass defect:1.338394772 u (per nucleus)Nuclear binding energy:1246.70669975 MeV (per nucleus)
8.20201776 MeV (average binding energy per nucleon)Separation energy:SN = 7.16(4) MeV (first neutron)
SP = 3.82(4) MeV (first proton)Half-life:17.5(1) hDecay constant λ:1.100233619936 × 10-5 s-1Specific activity α:4.387921747082 × 10+16 Bq g-1
1185924.7965089 Ci g-1Spin and parity:
(nuclear angular momentum)2-Magnetic dipole moment:μ(μN) = - 0.58(2)Quadrupole moment Q:+0.34(13) barn (100 fm2)Nuclear g-factor:gl = -0.29Charge radius:4.9689 femtometer fmYear of discovery:1959
Radioactive Decay
Half-life T½ = 17.5(1) h (hours) respectively 6.3000 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 152Gd | > 99 % | 3.99(4) MeV | |
| α | 148Eu | << 1 % | 3.16(4) MeV | |
Parent Nuclides
Direct parent isotope is: 152Dy.
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 |
|---|
| 152mTb | 501.74(19) keV | 4.2(1) min | 8+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 87) and isobaric (same nucleon number A = 152) with Terbium-152. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 87 | Isobar A = 152 |
|---|
| 49 | 136In | |
| 50 | 137Sn | |
| 51 | 138Sb | |
| 52 | 139Te | |
| 53 | 140I | |
| 54 | 141Xe | |
| 55 | 142Cs | |
| 56 | 143Ba | 152Ba |
| 57 | 144La | 152La |
| 58 | 145Ce | 152Ce |
| 59 | 146Pr | 152Pr |
| 60 | 147Nd | 152Nd |
| 61 | 148Pm | 152Pm |
| 62 | 149Sm | 152Sm |
| 63 | 150Eu | 152Eu |
| 64 | 151Gd | 152Gd |
| 65 | 152Tb | 152Tb |
| 66 | 153Dy | 152Dy |
| 67 | 154Ho | 152Ho |
| 68 | 155Er | 152Er |
| 69 | 156Tm | 152Tm |
| 70 | 157Yb | 152Yb |
| 71 | 158Lu | 152Lu |
| 72 | 159Hf | |
| 73 | 160Ta | |
| 74 | 161W | |
| 75 | 162Re | |
| 76 | 163Os | |
| 77 | 164Ir | |
| 78 | 165Pt | |
External data and identifiers
Last update: 2020-10-08
Perma link: https://www.chemlin.org/isotope/terbium-152
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