Gadolinium-145
Properties and data of the isotope 145Gd.
See also: List of individual Gadolinium isotopes (and general data sources).
General data
Name of the isotope:Gadolinium-145; Gd-145Symbol:145Gd or 14564GdMass number A:145 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:81Isotopic mass:144.921710(21) u (atomic weight of Gadolinium-145)Nuclide mass:144.8866037 u (calculated nuclear mass without electrons)Mass excess:-72.92667 MeVMass defect:1.280950244 u (per nucleus)Nuclear binding energy:1193.19746658 MeV (per nucleus)
8.22894805 MeV (average binding energy per nucleon)Separation energy:SN = 9.24(3) MeV (first neutron)
SP = 4.596(22) MeV (first proton)Half-life:23.0(4) minDecay constant λ:0.00050228056562315 s-1Specific activity α:2.10055855374 × 10+18 Bq g-1
56771852.803892 Ci g-1Spin and parity:
(nuclear angular momentum)1/2+Magnetic dipole moment:μ(μN) = - 0.74(5)Nuclear g-factor:gl = -1.48Charge radius:4.9786(77) femtometer fmYear of discovery:1959
Radioactive Decay
Half-life T½ = 23.0(4) min (minutes) respectively 1.380 × 103 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC β+ | 145Eu | 100 % | 5.065(20) MeV | |
Parent Nuclides
Direct parent isotope is: 145Tb.
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 |
|---|
| 145mGd | 749.1(2) keV | 85(3) s | 11/2- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 145) with Gadolinium-145. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 81 | Isobar A = 145 |
|---|
| 45 | 126Rh | |
| 46 | 127Pd | |
| 47 | 128Ag | |
| 48 | 129Cd | |
| 49 | 130In | |
| 50 | 131Sn | |
| 51 | 132Sb | |
| 52 | 133Te | |
| 53 | 134I | 145I |
| 54 | 135Xe | 145Xe |
| 55 | 136Cs | 145Cs |
| 56 | 137Ba | 145Ba |
| 57 | 138La | 145La |
| 58 | 139Ce | 145Ce |
| 59 | 140Pr | 145Pr |
| 60 | 141Nd | 145Nd |
| 61 | 142Pm | 145Pm |
| 62 | 143Sm | 145Sm |
| 63 | 144Eu | 145Eu |
| 64 | 145Gd | 145Gd |
| 65 | 146Tb | 145Tb |
| 66 | 147Dy | 145Dy |
| 67 | 148Ho | 145Ho |
| 68 | 149Er | 145Er |
| 69 | 150Tm | 145Tm |
| 70 | 151Yb | |
| 71 | 152Lu | |
| 72 | 153Hf | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/gadolinium-145
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