Gadolinium-148
Properties and data of the isotope 148Gd.
See also: List of individual Gadolinium isotopes (and general data sources).
General data
Name of the isotope:Gadolinium-148; Gd-148Symbol:148Gd or 14864GdMass number A:148 (= number of nucleons)Atomic number Z:64 (= number of protons)Neutrons N:84Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.3125 (= neutron-proton ratio)Neutron excess (N-Z):20Isotopic mass:147.9181215(17) u (atomic weight of Gadolinium-148)Nuclide mass:147.8830152 u (calculated nuclear mass without electrons)Mass excess:-76.26933 MeVMass defect:1.310533492 u (per nucleus)Nuclear binding energy:1220.7540846 MeV (per nucleus)
8.24833841 MeV (average binding energy per nucleon)Separation energy:SN = 8.9837(12) MeV (first neutron)
SP = 6.0135(24) MeV (first proton)Half-life:71.1(12) aDecay constant λ:3.091370888234 × 10-10 s-1Specific activity α:1266440199949.4 Bq g-1
34.228113512146 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.0080(171) femtometer fmYear of discovery:1953
Radioactive Decay
Half-life T½ = 71.1(12) a respectively 2.2422 × 109 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| α | 144Sm | 100 % | 3.27129(3) MeV | |
Parent Nuclides
Direct parent isotopes are: 148Tb, 152Dy.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 84) and isobaric (same nucleon number A = 148) with Gadolinium-148. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 84 | Isobar A = 148 |
|---|
| 47 | 131Ag | |
| 48 | 132Cd | |
| 49 | 133In | |
| 50 | 134Sn | |
| 51 | 135Sb | |
| 52 | 136Te | |
| 53 | 137I | |
| 54 | 138Xe | 148Xe |
| 55 | 139Cs | 148Cs |
| 56 | 140Ba | 148Ba |
| 57 | 141La | 148La |
| 58 | 142Ce | 148Ce |
| 59 | 143Pr | 148Pr |
| 60 | 144Nd | 148Nd |
| 61 | 145Pm | 148Pm |
| 62 | 146Sm | 148Sm |
| 63 | 147Eu | 148Eu |
| 64 | 148Gd | 148Gd |
| 65 | 149Tb | 148Tb |
| 66 | 150Dy | 148Dy |
| 67 | 151Ho | 148Ho |
| 68 | 152Er | 148Er |
| 69 | 153Tm | 148Tm |
| 70 | 154Yb | 148Yb |
| 71 | 155Lu | |
| 72 | 156Hf | |
| 73 | 157Ta | |
| 74 | 158W | |
| 75 | 159Re | |
| 76 | 160Os | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/gadolinium-148
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