Tellurium-127m
Properties and data of the isotope 127Te.
See also: list of Tellurium isotopes.
General data
Name of the isotope:Tellurium-127m; Te-127mSymbol:127Te or 12752TeMass number A:127 (= number of nucleons)Atomic number Z:52 (= number of protons)Neutrons N:75Isotopic mass:126.9052257(16) u (atomic weight of Tellurium-127m)
Excitation energy: 88.23(7) keVNuclide mass:126.8767013 u (calculated nuclear mass without electrons)Mass excess:-88.28169 MeVMass defect:1.151544664 u (per nucleus)Nuclear binding energy:1072.65694525 MeV (per nucleus)
8.44611768 MeV (average binding energy per nucleon)Half-life:106.1(7) dDecay constant λ:7.561297655076 × 10-8 s-1Specific activity α:3.613904727204 × 10+14 Bq g-1
9767.3100735268 Ci g-1Spin and parity:
(nuclear angular momentum)11/2-Magnetic dipole moment:μ(μN) = - 1.041(6)Nuclear g-factor:gl = -0.18927272727273
Radioactive Decay
Half-life T½ = 106.1(7) d respectively 9.167040 × 106 seconds s.
| Decay mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 127I | 2.4(2) % | | |
| Iso | 127Te | 97.6(2) % | | |
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 |
|---|
| 127Te | | 9.35(7) h | 3/2+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 75) and isobaric (same nucleon number A = 127) with Tellurium-127m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| OZ | Isotone N = 75 | Isobar A = 127 |
|---|
| 42 | 117Mo | |
| 43 | 118Tc | |
| 44 | 119Ru | |
| 45 | 120Rh | 127Rh |
| 46 | 121Pd | 127Pd |
| 47 | 122Ag | 127Ag |
| 48 | 123Cd | 127Cd |
| 49 | 124In | 127In |
| 50 | 125Sn | 127Sn |
| 51 | 126Sb | 127Sb |
| 52 | 127Te | 127Te |
| 53 | 128I | 127I |
| 54 | 129Xe | 127Xe |
| 55 | 130Cs | 127Cs |
| 56 | 131Ba | 127Ba |
| 57 | 132La | 127La |
| 58 | 133Ce | 127Ce |
| 59 | 134Pr | 127Pr |
| 60 | 135Nd | 127Nd |
| 61 | 136Pm | 127Pm |
| 62 | 137Sm | |
| 63 | 138Eu | |
| 64 | 139Gd | |
| 65 | 140Tb | |
| 66 | 141Dy | |
| 67 | 142Ho | |
| 68 | 143Er | |
| 69 | 144Tm | |
Last update: 2020-10-18
Perma link: https://www.chemlin.org/isotope/tellurium-127m
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