Technetium-95m

Properties and data of the isotope ^95mTc.

Contents

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

General data

Name of the isotope:Technetium-95m; Tc-95mSymbol:^95mTc or 95m43TcMass 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-95m)
Excitation energy: 38.91(4) keVNuclide 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)Half-life:61(2) dDecay constant λ:1.315269792333 × 10^-7 s^-1Specific activity α:8.426319104525 × 10⁺¹⁴ Bq g^-1
22773.835417637 Ci g^-1Spin and parity:
(nuclear angular momentum)1/2-

Radioactive Decay

Half-life T_½ = 61(2) d respectively 5.27 × 10⁶ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁹⁵Mo	96.12(32) %	1.730 MeV
Iso	⁹⁵Tc	3.88(32) %	0.039 MeV

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
⁹⁵Tc		20.0(1) h	9/2+

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-95m. 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