Technetium-98m

Properties and data of the isotope ^98mTc.

Contents

General data

Name of the isotope:Technetium-98m; Tc-98mSymbol:^98mTc or 98m43TcMass number A:98 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:55Isotopic mass:97.90721(3) u (atomic weight of Technetium-98m)
Excitation energy: 90.76(16) keVNuclide mass:97.8836222 u (calculated nuclear mass without electrons)Mass excess:-86.43333 MeVMass defect:0.905836756 u (per nucleus)Nuclear binding energy:843.78150319 MeV (per nucleus)
8.61001534 MeV (average binding energy per nucleon)Half-life:14.7(3) μsDecay constant λ:47152.869425847 s^-1Specific activity α:2.927435274563 × 10⁺²⁶ Bq g^-1
7.911987228549 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)(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
⁹⁸Tc		4.2(3) × 10⁶ a	(6)+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 55) and isobaric (same nucleon number A = 98) with Technetium-98m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 55	Isobar A = 98
30	⁸⁵Zn
31	⁸⁶Ga
32	⁸⁷Ge
33	⁸⁸As
34	⁸⁹Se
35	⁹⁰Br	⁹⁸Br
36	⁹¹Kr	⁹⁸Kr
37	⁹²Rb	⁹⁸Rb
38	⁹³Sr	⁹⁸Sr
39	⁹⁴Y	⁹⁸Y
40	⁹⁵Zr	⁹⁸Zr
41	⁹⁶Nb	⁹⁸Nb
42	⁹⁷Mo	⁹⁸Mo
43	⁹⁸Tc	⁹⁸Tc
44	⁹⁹Ru	⁹⁸Ru
45	¹⁰⁰Rh	⁹⁸Rh
46	¹⁰¹Pd	⁹⁸Pd
47	¹⁰²Ag	⁹⁸Ag
48	¹⁰³Cd	⁹⁸Cd
49	¹⁰⁴In	⁹⁸In
50	¹⁰⁵Sn
51	¹⁰⁶Sb
52	¹⁰⁷Te
53	¹⁰⁸I
54	¹⁰⁹Xe