Neodymium-135m
Properties and data of the isotope 135Nd.
See also: list of Neodymium isotopes.
General data
Name of the isotope:Neodymium-135m; Nd-135mSymbol:135Nd or 13560NdMass number A:135 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:75Isotopic mass:134.918181(21) u (atomic weight of Neodymium-135m)
Excitation energy: 64.95(24) keVNuclide mass:134.8852687 u (calculated nuclear mass without electrons)Mass excess:-76.21391 MeVMass defect:1.20118962 u (per nucleus)Nuclear binding energy:1118.90092389 MeV (per nucleus)
8.28815499 MeV (average binding energy per nucleon)Half-life:5.5(5) minDecay constant λ:0.0021004460016968 s-1Specific activity α:9.439687829036 × 10+18 Bq g-1
255126698.08207 Ci g-1Spin and parity:
(nuclear angular momentum)(1/2+)
Radioactive Decay
Half-life T½ = 5.5(5) min (minutes) respectively 3.30 × 102 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β+ | 135Pr | > 99.97 % | | |
Iso | 135Nd | < 0.03 % | | |
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 |
---|
135Nd | | 12.4(6) min | 9/2(-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 75) and isobaric (same nucleon number A = 135) with Neodymium-135m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 75 | Isobar A = 135 |
42 | 117Mo | |
43 | 118Tc | |
44 | 119Ru | |
45 | 120Rh | |
46 | 121Pd | |
47 | 122Ag | |
48 | 123Cd | |
49 | 124In | 135In |
50 | 125Sn | 135Sn |
51 | 126Sb | 135Sb |
52 | 127Te | 135Te |
53 | 128I | 135I |
54 | 129Xe | 135Xe |
55 | 130Cs | 135Cs |
56 | 131Ba | 135Ba |
57 | 132La | 135La |
58 | 133Ce | 135Ce |
59 | 134Pr | 135Pr |
60 | 135Nd | 135Nd |
61 | 136Pm | 135Pm |
62 | 137Sm | 135Sm |
63 | 138Eu | 135Eu |
64 | 139Gd | 135Gd |
65 | 140Tb | 135Tb |
66 | 141Dy | |
67 | 142Ho | |
68 | 143Er | |
69 | 144Tm | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/neodymium-135m
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