Technetium-92

Properties and data of the isotope ⁹²Tc.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Technetium-92; Tc-92Symbol:⁹²Tc or 9243TcMass number A:92 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:49Isotopic mass:91.915270(3) u (atomic weight of Technetium-92)Nuclide mass:91.8916822 u (calculated nuclear mass without electrons)Mass excess:-78.92549 MeVMass defect:0.84578725999999 u (per nucleus)Nuclear binding energy:787.84575797 MeV (per nucleus)
8.56354085 MeV (average binding energy per nucleon)Separation energy:S_N = 11.01(4) MeV (first neutron)
S_P = 4.006(7) MeV (first proton)Half-life:4.25(15) minDecay constant λ:0.00271822423749 s^-1Specific activity α:1.798849367808 × 10⁺¹⁹ Bq g^-1
486175504.81316 Ci g^-1Spin and parity:
(nuclear angular momentum)(8)+Year of discovery:1964

Radioactive Decay

Half-life T_½ = 4.25(15) min (minutes) respectively 2.55 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹¹Mo	100 %	7.883(3) MeV

Parent Nuclides

Direct parent isotope is: ⁹²Ru.

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
^92mTc	270.09(8)	1.03(7) μs	(4+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 92) with Technetium-92. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 49	Isobar A = 92
27	⁷⁶Co
28	⁷⁷Ni
29	⁷⁸Cu
30	⁷⁹Zn
31	⁸⁰Ga
32	⁸¹Ge
33	⁸²As	⁹²As
34	⁸³Se	⁹²Se
35	⁸⁴Br	⁹²Br
36	⁸⁵Kr	⁹²Kr
37	⁸⁶Rb	⁹²Rb
38	⁸⁷Sr	⁹²Sr
39	⁸⁸Y	⁹²Y
40	⁸⁹Zr	⁹²Zr
41	⁹⁰Nb	⁹²Nb
42	⁹¹Mo	⁹²Mo
43	⁹²Tc	⁹²Tc
44	⁹³Ru	⁹²Ru
45	⁹⁴Rh	⁹²Rh
46	⁹⁵Pd	⁹²Pd
47	⁹⁶Ag	⁹²Ag
48	⁹⁷Cd
49	⁹⁸In
50	⁹⁹Sn