Technetium-102

Properties and data of the isotope ¹⁰²Tc.

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-102; Tc-102Symbol:¹⁰²Tc or 10243TcMass number A:102 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:59Isotopic mass:101.909207(10) u (atomic weight of Technetium-102)Nuclide mass:101.8856192 u (calculated nuclear mass without electrons)Mass excess:-84.57313 MeVMass defect:0.93849942000001 u (per nucleus)Nuclear binding energy:874.20657873 MeV (per nucleus)
8.57065273 MeV (average binding energy per nucleon)Separation energy:S_N = 6.300(26) MeV (first neutron)
S_P = 8.342(9) MeV (first proton)Half-life:5.28(15) sDecay constant λ:0.13127787510605 s^-1Specific activity α:7.827463917641 × 10⁺²⁰ Bq g^-1
21155307885.518 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1954

Radioactive Decay

Half-life T_½ = 5.28(15) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰²Ru	100 %	4.534(9) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰²Mo.

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
^102mTc	+x keV	4.35(7) min	(4,5)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 102) with Technetium-102. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 59	Isobar A = 102
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr
37	⁹⁶Rb	¹⁰²Rb
38	⁹⁷Sr	¹⁰²Sr
39	⁹⁸Y	¹⁰²Y
40	⁹⁹Zr	¹⁰²Zr
41	¹⁰⁰Nb	¹⁰²Nb
42	¹⁰¹Mo	¹⁰²Mo
43	¹⁰²Tc	¹⁰²Tc
44	¹⁰³Ru	¹⁰²Ru
45	¹⁰⁴Rh	¹⁰²Rh
46	¹⁰⁵Pd	¹⁰²Pd
47	¹⁰⁶Ag	¹⁰²Ag
48	¹⁰⁷Cd	¹⁰²Cd
49	¹⁰⁸In	¹⁰²In
50	¹⁰⁹Sn	¹⁰²Sn
51	¹¹⁰Sb
52	¹¹¹Te
53	¹¹²I
54	¹¹³Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La