Technetium-87m
Properties and data of the isotope 87mTc.
See also: list of Technetium isotopes.
General data
Name of the isotope:Technetium-87m; Tc-87mSymbol:87mTc or 87m43TcMass number A:87 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:44Isotopic mass:86.938067(4) u (atomic weight of Technetium-87m)
Excitation energy: 71+x keVNuclide mass:86.9144792 u (calculated nuclear mass without electrons)Mass excess:-57.69022 MeVMass defect:0.77966568000001 u (per nucleus)Nuclear binding energy:726.25390293 MeV (per nucleus)
8.34774601 MeV (average binding energy per nucleon)Half-life:647(24) nsDecay constant λ:1071324.8540339 s-1Specific activity α:7.501940904352 × 10+27 Bq g-1
2.02755159577 × 10+17 Ci g-1Spin and parity:
(nuclear angular momentum)(7/2+)
Radioactive Decay
Half-life T½ = 647(24) ns respectively 6.47 × 10-7 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
Iso | 87Tc | 100 % | | |
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 |
---|
87Tc | | 2.2(2) s | (9/2+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 87) with Technetium-87m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 44 | Isobar A = 87 |
23 | 67V | |
24 | 68Cr | |
25 | 69Mn | |
26 | 70Fe | |
27 | 71Co | |
28 | 72Ni | |
29 | 73Cu | |
30 | 74Zn | |
31 | 75Ga | 87Ga |
32 | 76Ge | 87Ge |
33 | 77As | 87As |
34 | 78Se | 87Se |
35 | 79Br | 87Br |
36 | 80Kr | 87Kr |
37 | 81Rb | 87Rb |
38 | 82Sr | 87Sr |
39 | 83Y | 87Y |
40 | 84Zr | 87Zr |
41 | 85Nb | 87Nb |
42 | 86Mo | 87Mo |
43 | 87Tc | 87Tc |
44 | 88Ru | 87Ru |
45 | 89Rh | |
46 | 90Pd | |
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/technetium-87m
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