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Technetium-87m

Properties and data of the isotope 87mTc.


Contents

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 keV
Nuclide 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-1
Spin and parity:
(nuclear angular momentum)
(7/2+)

 

Radioactive Decay

Half-life T½ = 647(24) ns respectively 6.47 × 10-7 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
Iso87Tc100 %

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
87Tc2.2(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.

 

ZIsotone N = 44Isobar A = 87
2367V
2468Cr
2569Mn
2670Fe
2771Co
2872Ni
2973Cu
3074Zn
3175Ga87Ga
3276Ge87Ge
3377As87As
3478Se87Se
3579Br87Br
3680Kr87Kr
3781Rb87Rb
3882Sr87Sr
3983Y87Y
4084Zr87Zr
4185Nb87Nb
4286Mo87Mo
4387Tc87Tc
4488Ru87Ru
4589Rh
4690Pd

 


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Last update: 2020-10-15


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