Technetium-97m

Properties and data of the isotope ^97mTc.

Contents

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

General data

Name of the isotope:Technetium-97m; Tc-97mSymbol:^97mTc or 97m43TcMass number A:97 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:54Isotopic mass:96.906361(4) u (atomic weight of Technetium-97m)
Excitation energy: 96.57(6) keVNuclide mass:96.8827732 u (calculated nuclear mass without electrons)Mass excess:-87.22417 MeVMass defect:0.89802084 u (per nucleus)Nuclear binding energy:836.50102433 MeV (per nucleus)
8.6237219 MeV (average binding energy per nucleon)Half-life:91.0(6) dDecay constant λ:8.816423054692 × 10^-8 s^-1Specific activity α:5.530598074599 × 10⁺¹⁴ Bq g^-1
14947.562363782 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-

Radioactive Decay

Half-life T_½ = 91.0(6) d respectively 7.862 × 10⁶ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC	⁹⁷Mo	3.94(18) %	0.417 MeV
Iso	⁹⁷Tc	96.06(18) %	0.097 MeV

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
⁹⁷Tc		4.21(16) × 10⁶ a	9/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 54) and isobaric (same nucleon number A = 97) with Technetium-97m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 54	Isobar A = 97
30	⁸⁴Zn
31	⁸⁵Ga
32	⁸⁶Ge
33	⁸⁷As
34	⁸⁸Se
35	⁸⁹Br	⁹⁷Br
36	⁹⁰Kr	⁹⁷Kr
37	⁹¹Rb	⁹⁷Rb
38	⁹²Sr	⁹⁷Sr
39	⁹³Y	⁹⁷Y
40	⁹⁴Zr	⁹⁷Zr
41	⁹⁵Nb	⁹⁷Nb
42	⁹⁶Mo	⁹⁷Mo
43	⁹⁷Tc	⁹⁷Tc
44	⁹⁸Ru	⁹⁷Ru
45	⁹⁹Rh	⁹⁷Rh
46	¹⁰⁰Pd	⁹⁷Pd
47	¹⁰¹Ag	⁹⁷Ag
48	¹⁰²Cd	⁹⁷Cd
49	¹⁰³In	⁹⁷In
50	¹⁰⁴Sn
51	¹⁰⁵Sb
52	¹⁰⁶Te