Neodymium-140m
Properties and data of the isotope 140Nd.
See also: list of Neodymium isotopes.
General data
Name of the isotope:Neodymium-140m; Nd-140mSymbol:140Nd or 14060NdMass number A:140 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:80Isotopic mass:139.909544(4) u (atomic weight of Neodymium-140m)
Excitation energy: 2221.4(1) keVNuclide mass:139.8766317 u (calculated nuclear mass without electrons)Mass excess:-84.25922 MeVMass defect:1.2531512 u (per nucleus)Nuclear binding energy:1167.30282389 MeV (per nucleus)
8.33787731 MeV (average binding energy per nucleon)Half-life:0.60(5) msDecay constant λ:1155.2453009332 s-1Specific activity α:5.005071892086 × 10+24 Bq g-1
1.352722132996 × 10+14 Ci g-1Spin and parity:
(nuclear angular momentum)7-
Radioactive Decay
Half-life T½ = 0.60(5) ms respectively 6.0 × 10-4 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
Iso | 140Nd | 100 % | | |
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 |
---|
140Nd | | 3.37(2) d | 0+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 80) and isobaric (same nucleon number A = 140) with Neodymium-140m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 80 | Isobar A = 140 |
44 | 124Ru | |
45 | 125Rh | |
46 | 126Pd | |
47 | 127Ag | |
48 | 128Cd | |
49 | 129In | |
50 | 130Sn | |
51 | 131Sb | 140Sb |
52 | 132Te | 140Te |
53 | 133I | 140I |
54 | 134Xe | 140Xe |
55 | 135Cs | 140Cs |
56 | 136Ba | 140Ba |
57 | 137La | 140La |
58 | 138Ce | 140Ce |
59 | 139Pr | 140Pr |
60 | 140Nd | 140Nd |
61 | 141Pm | 140Pm |
62 | 142Sm | 140Sm |
63 | 143Eu | 140Eu |
64 | 144Gd | 140Gd |
65 | 145Tb | 140Tb |
66 | 146Dy | 140Dy |
67 | 147Ho | 140Ho |
68 | 148Er | |
69 | 149Tm | |
70 | 150Yb | |
71 | 151Lu | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/neodymium-140m
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