Technetium-95

Properties and data of the isotope ⁹⁵Tc.

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-95; Tc-95Symbol:⁹⁵Tc or 9543TcMass number A:95 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:52Isotopic mass:94.907652(5) u (atomic weight of Technetium-95)Nuclide mass:94.8840642 u (calculated nuclear mass without electrons)Mass excess:-86.02161 MeVMass defect:0.879400008 u (per nucleus)Nuclear binding energy:819.15583105 MeV (per nucleus)
8.62269296 MeV (average binding energy per nucleon)Separation energy:S_N = 9.934(7) MeV (first neutron)
S_P = 4.896(5) MeV (first proton)Half-life:20.0(1) hDecay constant λ:9.627044174443 × 10^-6 s^-1Specific activity α:6.167597455673 × 10⁺¹⁶ Bq g^-1
1666918.2312632 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = 5.94(6)Nuclear g-factor:g_l = 1.32Year of discovery:1947

Radioactive Decay

Half-life T_½ = 20.0(1) h (hours) respectively 7.2000 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹⁵Mo	100 %	1.691(5) MeV

Parent Nuclides

Direct parent isotope is: ⁹⁵Ru.

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
^95mTc	38.91(4) keV	61(2) d	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 52) and isobaric (same nucleon number A = 95) with Technetium-95. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 52	Isobar A = 95
28	⁸⁰Ni
29	⁸¹Cu
30	⁸²Zn
31	⁸³Ga
32	⁸⁴Ge
33	⁸⁵As
34	⁸⁶Se	⁹⁵Se
35	⁸⁷Br	⁹⁵Br
36	⁸⁸Kr	⁹⁵Kr
37	⁸⁹Rb	⁹⁵Rb
38	⁹⁰Sr	⁹⁵Sr
39	⁹¹Y	⁹⁵Y
40	⁹²Zr	⁹⁵Zr
41	⁹³Nb	⁹⁵Nb
42	⁹⁴Mo	⁹⁵Mo
43	⁹⁵Tc	⁹⁵Tc
44	⁹⁶Ru	⁹⁵Ru
45	⁹⁷Rh	⁹⁵Rh
46	⁹⁸Pd	⁹⁵Pd
47	⁹⁹Ag	⁹⁵Ag
48	¹⁰⁰Cd	⁹⁵Cd
49	¹⁰¹In
50	¹⁰²Sn
51	¹⁰³Sb