Cerium-126
Properties and data of the isotope 126Ce.
See also: list of Cerium isotopes.
General data
Name of the isotope:Cerium-126; Ce-126Symbol:126Ce or 12658CeMass number A:126 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:68Isotopic mass:125.92397(3) u (atomic weight of Cerium-126)Nuclide mass:125.8921546 u (calculated nuclear mass without electrons)Mass excess:-70.82149 MeVMass defect:1.119096144 u (per nucleus)Nuclear binding energy:1042.43134356 MeV (per nucleus)
8.27326463 MeV (average binding energy per nucleon)Separation energy:SN = 12.23(29) MeV (first neutron)
SP = 4.35(4) MeV (first proton)Half-life:51.0(3) sDecay constant λ:0.01359112118745 s-1Specific activity α:6.547811698823 × 10+19 Bq g-1
1769678837.5199 Ci g-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1978
Radioactive Decay
Half-life T½ = 51.0(3) s respectively 5.10 × 101 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC/β+ | 126La | 100 % | 4.15(9) MeV | |
Parent Nuclides
Direct parent isotope is: 126Pr.
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 68) and isobaric (same nucleon number A = 126) with Cerium-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 68 | Isobar A = 126 |
38 | 106Sr | |
39 | 107Y | |
40 | 108Zr | |
41 | 109Nb | |
42 | 110Mo | |
43 | 111Tc | |
44 | 112Ru | |
45 | 113Rh | 126Rh |
46 | 114Pd | 126Pd |
47 | 115Ag | 126Ag |
48 | 116Cd | 126Cd |
49 | 117In | 126In |
50 | 118Sn | 126Sn |
51 | 119Sb | 126Sb |
52 | 120Te | 126Te |
53 | 121I | 126I |
54 | 122Xe | 126Xe |
55 | 123Cs | 126Cs |
56 | 124Ba | 126Ba |
57 | 125La | 126La |
58 | 126Ce | 126Ce |
59 | 127Pr | 126Pr |
60 | 128Nd | 126Nd |
61 | 129Pm | 126Pm |
62 | 130Sm | |
63 | 131Eu | |
External data and identifiers
Last update: 2020-10-19
Perma link: https://www.chemlin.org/isotope/cerium-126
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