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Tellurium-126

Properties and data of the isotope 126Te.


Contents

See also: list of Tellurium isotopes.

 

General data

Name of the isotope:Tellurium-126; Te-126Symbol:126Te or 12652TeMass number A:126 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:74Isotopic mass:125.90331(1) u (atomic weight of Tellurium-126)Nuclide mass:125.8747856 u (calculated nuclear mass without electrons)Mass excess:-90.06615 MeVMass defect:1.144795448 u (per nucleus)Nuclear binding energy:1066.37009104 MeV (per nucleus)
8.46325469 MeV (average binding energy per nucleon)
Separation energy:SN = 9.11369(8) MeV (first neutron)
SP = 9.0980(21) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:4.7266(32) femtometer fmYear of discovery:1924

 

Parent Nuclides

Direct parent isotopes are: 126I, 126Sb.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Tellurium
Isotopic mixture
127.60 u100 %
Isotope 120Te119.90406(2) u0.09(1) %stable0+
Isotope 122Te121.90304(1) u2.55(12) %stable0+
Isotope 123Te122.90427(1) u0.89(3) %9.2 × 1016 a1/2+
Isotope 124Te123.90282(1) u4.74(14) %stable0+
Isotope 125Te124.9044312(15) u7.07(15) %stable1/2+
Isotope 126Te125.90331(1) u18.84(25) %stable0+
Isotope 128Te127.904461(6) u31.74(8) %7.7(4) × 1024 a0+
Isotope 130Te129.90622275(8) u34.08(62) %0.79 × 1021 a0+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 74) and isobaric (same nucleon number A = 126) with Tellurium-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 74Isobar A = 126
41115Nb
42116Mo
43117Tc
44118Ru
45119Rh126Rh
46120Pd126Pd
47121Ag126Ag
48122Cd126Cd
49123In126In
50124Sn126Sn
51125Sb126Sb
52126Te126Te
53127I126I
54128Xe126Xe
55129Cs126Cs
56130Ba126Ba
57131La126La
58132Ce126Ce
59133Pr126Pr
60134Nd126Nd
61135Pm126Pm
62136Sm
63137Eu
64138Gd
65139Tb
66140Dy
67141Ho

 

External data and identifiers

Adopted Levels, Gammas:NuDat 126Te

 


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Last update: 2020-10-18


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