Neodymium-125
Properties and data of the isotope 125Nd.
See also: List of individual Neodymium isotopes (and general data sources).
General data
Name of the isotope:Neodymium-125; Nd-125Symbol:125Nd or 12560NdMass number A:125 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:65Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.0833333333333 (= neutron-proton ratio)Neutron excess (N-Z):5Isotopic mass:124.94890(43) u (atomic weight of Neodymium-125)Nuclide mass:124.9159877 u (calculated nuclear mass without electrons)Mass excess:-47.59934 MeVMass defect:1.08382146 u (per nucleus)Nuclear binding energy:1009.57318706 MeV (per nucleus)
8.0765855 MeV (average binding energy per nucleon)Separation energy:SN = 11.14(64) MeV (first neutron)
SP = 1.74(57) MeV (first proton)Half-life:0.65(15) sDecay constant λ:1.0663802777845 s-1Specific activity α:5.178945357320 × 10+21 Bq g-1
139971496143.79 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2)Year of discovery:1999
Radioactive Decay
Half-life T½ = 0.65(15) s respectively 6.5 × 10-1 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 125Pr | > 99 % | 10.34(50) MeV | |
| EC, p | 124Ce | ≤≤ 1 % | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 65) and isobaric (same nucleon number A = 125) with Neodymium-125. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 65 | Isobar A = 125 |
|---|
| 36 | 101Kr | |
| 37 | 102Rb | |
| 38 | 103Sr | |
| 39 | 104Y | |
| 40 | 105Zr | |
| 41 | 106Nb | |
| 42 | 107Mo | |
| 43 | 108Tc | |
| 44 | 109Ru | |
| 45 | 110Rh | 125Rh |
| 46 | 111Pd | 125Pd |
| 47 | 112Ag | 125Ag |
| 48 | 113Cd | 125Cd |
| 49 | 114In | 125In |
| 50 | 115Sn | 125Sn |
| 51 | 116Sb | 125Sb |
| 52 | 117Te | 125Te |
| 53 | 118I | 125I |
| 54 | 119Xe | 125Xe |
| 55 | 120Cs | 125Cs |
| 56 | 121Ba | 125Ba |
| 57 | 122La | 125La |
| 58 | 123Ce | 125Ce |
| 59 | 124Pr | 125Pr |
| 60 | 125Nd | 125Nd |
| 61 | 126Pm | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/neodymium-125
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