Technetium-113m

Properties and data of the isotope ^113mTc.

Contents

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

General data

Name of the isotope:Technetium-113m; Tc-113mSymbol:^113mTc or 113m43TcMass number A:113 (= number of nucleons)Atomic number Z:43 (= number of protons)Neutrons N:70Isotopic mass:112.932569(4) u (atomic weight of Technetium-113m)
Excitation energy: 114.4(5) keVNuclide mass:112.9089812 u (calculated nuclear mass without electrons)Mass excess:-62.81157 MeVMass defect:1.010451496 u (per nucleus)Nuclear binding energy:941.22950582 MeV (per nucleus)
8.32946465 MeV (average binding energy per nucleon)Half-life:0.526 μsDecay constant λ:1317770.305247 s^-1Specific activity α:7.085534285035 × 10⁺²⁷ Bq g^-1
1.915009266225 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)

Radioactive Decay

Half-life T_½ = 0.526 μs respectively 5.26 × 10^-7 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹¹³Tc	100 %

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
¹¹³Tc		152(8) ms	(5/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 70) and isobaric (same nucleon number A = 113) with Technetium-113m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 70	Isobar A = 113
39	¹⁰⁹Y
40	¹¹⁰Zr
41	¹¹¹Nb	¹¹³Nb
42	¹¹²Mo	¹¹³Mo
43	¹¹³Tc	¹¹³Tc
44	¹¹⁴Ru	¹¹³Ru
45	¹¹⁵Rh	¹¹³Rh
46	¹¹⁶Pd	¹¹³Pd
47	¹¹⁷Ag	¹¹³Ag
48	¹¹⁸Cd	¹¹³Cd
49	¹¹⁹In	¹¹³In
50	¹²⁰Sn	¹¹³Sn
51	¹²¹Sb	¹¹³Sb
52	¹²²Te	¹¹³Te
53	¹²³I	¹¹³I
54	¹²⁴Xe	¹¹³Xe
55	¹²⁵Cs	¹¹³Cs
56	¹²⁶Ba
57	¹²⁷La
58	¹²⁸Ce
59	¹²⁹Pr
60	¹³⁰Nd
61	¹³¹Pm
62	¹³²Sm
63	¹³³Eu
64	¹³⁴Gd
65	¹³⁵Tb