Technetium-101

Properties and data of the isotope ¹⁰¹Tc.

Contents

General data

Name of the isotope:Technetium-101; Tc-101Symbol:¹⁰¹Tc or 10143TcMass number A:101 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:58Isotopic mass:100.907305(26) u (atomic weight of Technetium-101)Nuclide mass:100.8837172 u (calculated nuclear mass without electrons)Mass excess:-86.34484 MeVMass defect:0.93173650400001 u (per nucleus)Nuclear binding energy:867.90696306 MeV (per nucleus)
8.59313825 MeV (average binding energy per nucleon)Separation energy:S_N = 8.395(24) MeV (first neutron)
S_P = 7.441(24) MeV (first proton)Half-life:14.22(1) minDecay constant λ:0.00081240879109229 s^-1Specific activity α:4.892440175808 × 10⁺¹⁸ Bq g^-1
132228112.85969 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Year of discovery:1941

Radioactive Decay

Half-life T_½ = 14.22(1) min (minutes) respectively 8.532 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰¹Ru	100 %	1.614(24) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰¹Mo.

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
^101mTc	207.526(20) keV	636(8) μs	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 58) and isobaric (same nucleon number A = 101) with Technetium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 58	Isobar A = 101
32	⁹⁰Ge
33	⁹¹As
34	⁹²Se
35	⁹³Br
36	⁹⁴Kr	¹⁰¹Kr
37	⁹⁵Rb	¹⁰¹Rb
38	⁹⁶Sr	¹⁰¹Sr
39	⁹⁷Y	¹⁰¹Y
40	⁹⁸Zr	¹⁰¹Zr
41	⁹⁹Nb	¹⁰¹Nb
42	¹⁰⁰Mo	¹⁰¹Mo
43	¹⁰¹Tc	¹⁰¹Tc
44	¹⁰²Ru	¹⁰¹Ru
45	¹⁰³Rh	¹⁰¹Rh
46	¹⁰⁴Pd	¹⁰¹Pd
47	¹⁰⁵Ag	¹⁰¹Ag
48	¹⁰⁶Cd	¹⁰¹Cd
49	¹⁰⁷In	¹⁰¹In
50	¹⁰⁸Sn	¹⁰¹Sn
51	¹⁰⁹Sb
52	¹¹⁰Te
53	¹¹¹I
54	¹¹²Xe
55	¹¹³Cs
56	¹¹⁴Ba