Technetium-107

Properties and data of the isotope ¹⁰⁷Tc.

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-107; Tc-107Symbol:¹⁰⁷Tc or 10743TcMass number A:107 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:64Isotopic mass:106.915458(9) u (atomic weight of Technetium-107)Nuclide mass:106.8918702 u (calculated nuclear mass without electrons)Mass excess:-78.75037 MeVMass defect:0.975573 u (per nucleus)Nuclear binding energy:908.74039606 MeV (per nucleus)
8.4929009 MeV (average binding energy per nucleon)Separation energy:S_N = 7.045(15) MeV (first neutron)
S_P = 9.904(13) MeV (first proton)Half-life:21.2(2) sDecay constant λ:0.032695621724526 s^-1Specific activity α:1.857524901210 × 10⁺²⁰ Bq g^-1
5020337570.8389 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2-)Year of discovery:1965

Radioactive Decay

Half-life T_½ = 21.2(2) s respectively 2.12 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁷Ru	100 %	5.113(12) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰⁷Mo.

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
^107m1Tc	30.1(1) keV	3.85(5) μs	(1/2+)
^107m2Tc	65.72(14) keV	184(3) ns	(5/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 64) and isobaric (same nucleon number A = 107) with Technetium-107. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 64	Isobar A = 107
36	¹⁰⁰Kr
37	¹⁰¹Rb
38	¹⁰²Sr	¹⁰⁷Sr
39	¹⁰³Y	¹⁰⁷Y
40	¹⁰⁴Zr	¹⁰⁷Zr
41	¹⁰⁵Nb	¹⁰⁷Nb
42	¹⁰⁶Mo	¹⁰⁷Mo
43	¹⁰⁷Tc	¹⁰⁷Tc
44	¹⁰⁸Ru	¹⁰⁷Ru
45	¹⁰⁹Rh	¹⁰⁷Rh
46	¹¹⁰Pd	¹⁰⁷Pd
47	¹¹¹Ag	¹⁰⁷Ag
48	¹¹²Cd	¹⁰⁷Cd
49	¹¹³In	¹⁰⁷In
50	¹¹⁴Sn	¹⁰⁷Sn
51	¹¹⁵Sb	¹⁰⁷Sb
52	¹¹⁶Te	¹⁰⁷Te
53	¹¹⁷I
54	¹¹⁸Xe
55	¹¹⁹Cs
56	¹²⁰Ba
57	¹²¹La
58	¹²²Ce
59	¹²³Pr
60	¹²⁴Nd