Technetium-87m

Properties and data of the isotope ^87mTc.

Contents

See also: List of individual Technetium isotopes (and general data sources).

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 T_½ = 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
22	⁶⁶Ti
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