Neodymium-157
Properties and data of the isotope 157Nd.
See also: list of Neodymium isotopes.
General data
Name of the isotope:Neodymium-157; Nd-157Symbol:157Nd or 15760NdMass number A:157 (= number of nucleons)Atomic number Z:60 (= number of protons)Neutrons N:97Isotopic mass:156.939386(27) u (atomic weight of Neodymium-157)Nuclide mass:156.9064737 u (calculated nuclear mass without electrons)Mass excess:-56.46158 MeVMass defect:1.370612772 u (per nucleus)Nuclear binding energy:1276.71757344 MeV (per nucleus)
8.13195907 MeV (average binding energy per nucleon)Separation energy:SN = 4.06(20) MeV (first neutron)
SP = 12.18(20) MeV (first proton)Half-life:1.15(3) sDecay constant λ:0.60273667874778 s-1Specific activity α:2.326772551839 × 10+21 Bq g-1
62885744644.311 Ci g-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1992
Radioactive Decay
Half-life T½ = 1.15(3) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 157Pm | 100 % | 5.835(26) MeV | |
Parent Nuclides
Direct parent isotope is: 157Pr.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 97) and isobaric (same nucleon number A = 157) with Neodymium-157. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 97 | Isobar A = 157 |
56 | 153Ba | |
57 | 154La | |
58 | 155Ce | 157Ce |
59 | 156Pr | 157Pr |
60 | 157Nd | 157Nd |
61 | 158Pm | 157Pm |
62 | 159Sm | 157Sm |
63 | 160Eu | 157Eu |
64 | 161Gd | 157Gd |
65 | 162Tb | 157Tb |
66 | 163Dy | 157Dy |
67 | 164Ho | 157Ho |
68 | 165Er | 157Er |
69 | 166Tm | 157Tm |
70 | 167Yb | 157Yb |
71 | 168Lu | 157Lu |
72 | 169Hf | 157Hf |
73 | 170Ta | 157Ta |
74 | 171W | 157W |
75 | 172Re | |
76 | 173Os | |
77 | 174Ir | |
78 | 175Pt | |
79 | 176Au | |
80 | 177Hg | |
81 | 178Tl | |
82 | 179Pb | |
External data and identifiers
Last update: 2020-10-20
Perma link: https://www.chemlin.org/isotope/neodymium-157
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