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Cerium-142

Properties and data of the isotope 142Ce.


Content

See also: list of Cerium isotopes.

 

General data

Name of the isotope:Cerium-142; Ce-142Symbol:142Ce or 14258CeMass number A:142 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:84Isotopic mass:141.90925(2) u (atomic weight of Cerium-142)Nuclide mass:141.8774346 u (calculated nuclear mass without electrons)Mass excess:-84.53308 MeVMass defect:1.2724548 u (per nucleus)Nuclear binding energy:1185.28401147 MeV (per nucleus)
8.3470705 MeV (average binding energy per nucleon)
Separation energy:SN = 7.1716(25) MeV (first neutron)
SP = 8.891(5) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:4.9063(20) femtometer fmYear of discovery:1925

 

Radioactive Decay

Half-life T½ = stable.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
2 β-142Nd

 

Parent Nuclides

Direct parent isotopes are: 142La, 142Pr.

 

Occurrence

Comparison of the natural Cerium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Cerium
Isotopic mixture
140.116 u100 %
Isotope 136Ce135.907129(3) u0.186(2) %stable0+
Isotope 138Ce137.90599(7) u0.251(2) %stable0+
Isotope 140Ce139.90544(2) u88.449(51) %stable0+
Isotope 142Ce141.90925(2) u11.114(51) %stable0+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 84) and isobaric (same nucleon number A = 142) with Cerium-142. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 84Isobar A = 142
47131Ag
48132Cd
49133In
50134Sn
51135Sb
52136Te142Te
53137I142I
54138Xe142Xe
55139Cs142Cs
56140Ba142Ba
57141La142La
58142Ce142Ce
59143Pr142Pr
60144Nd142Nd
61145Pm142Pm
62146Sm142Sm
63147Eu142Eu
64148Gd142Gd
65149Tb142Tb
66150Dy142Dy
67151Ho142Ho
68152Er
69153Tm
70154Yb
71155Lu
72156Hf
73157Ta
74158W
75159Re

 

External data and identifiers

Adopted Levels, Gammas:NuDat 142Ce

 


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Last update: 2020-09-28


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