Technetium-94m

Properties and data of the isotope ^94mTc.

Contents

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

General data

Name of the isotope:Technetium-94m; Tc-94mSymbol:^94mTc or 94m43TcMass number A:94 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:51Isotopic mass:93.909652(4) u (atomic weight of Technetium-94m)
Excitation energy: 76(3) keVNuclide mass:93.8860642 u (calculated nuclear mass without electrons)Mass excess:-84.15862 MeVMass defect:0.86873509200001 u (per nucleus)Nuclear binding energy:809.22152579 MeV (per nucleus)
8.60873964 MeV (average binding energy per nucleon)Half-life:52.0(10) minDecay constant λ:0.00022216255787178 s^-1Specific activity α:1.438595932588 × 10⁺¹⁸ Bq g^-1
38880971.151051 Ci g^-1Spin and parity:
(nuclear angular momentum)(2)+

Radioactive Decay

Half-life T_½ = 52.0(10) min (minutes) respectively 3.120 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹⁴Mo	100 %	4.331 MeV
Iso	⁹⁴Tc	< 0.1 %	0.075 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
⁹⁴Tc		293(1) min	7+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 51) and isobaric (same nucleon number A = 94) with Technetium-94m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 51	Isobar A = 94
28	⁷⁹Ni
29	⁸⁰Cu
30	⁸¹Zn
31	⁸²Ga
32	⁸³Ge
33	⁸⁴As
34	⁸⁵Se	⁹⁴Se
35	⁸⁶Br	⁹⁴Br
36	⁸⁷Kr	⁹⁴Kr
37	⁸⁸Rb	⁹⁴Rb
38	⁸⁹Sr	⁹⁴Sr
39	⁹⁰Y	⁹⁴Y
40	⁹¹Zr	⁹⁴Zr
41	⁹²Nb	⁹⁴Nb
42	⁹³Mo	⁹⁴Mo
43	⁹⁴Tc	⁹⁴Tc
44	⁹⁵Ru	⁹⁴Ru
45	⁹⁶Rh	⁹⁴Rh
46	⁹⁷Pd	⁹⁴Pd
47	⁹⁸Ag	⁹⁴Ag
48	⁹⁹Cd	⁹⁴Cd
49	¹⁰⁰In
50	¹⁰¹Sn