Ruthenium-103m
Properties and data of the isotope 103mRu.
See also: list of Ruthenium isotopes.
General data
Name of the isotope:Ruthenium-103m; Ru-103mSymbol:103mRu or 103m44RuMass number A:103 (= number of nucleons)Atomic number Z:44 (= number of protons)Neutrons N:59Isotopic mass:102.9063148(5) u (atomic weight of Ruthenium-103m)
Excitation energy: 238.2(7) keVNuclide mass:102.8821785 u (calculated nuclear mass without electrons)Mass excess:-87.2672 MeVMass defect:0.949216652 u (per nucleus)Nuclear binding energy:884.18961604 MeV (per nucleus)
8.5843652 MeV (average binding energy per nucleon)Half-life:1.69(7) msDecay constant λ:410.14626068636 s-1Specific activity α:2.42152799512 × 10+24 Bq g-1
65446702571000 Ci g-1Spin and parity:
(nuclear angular momentum)11/2-
Radioactive Decay
Half-life T½ = 1.69(7) ms respectively 1.69 × 10-3 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
Iso | 103Ru | 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 |
---|
103Ru | | 39.247(13) d | 3/2+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 103) with Ruthenium-103m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 59 | Isobar A = 103 |
33 | 92As | |
34 | 93Se | |
35 | 94Br | |
36 | 95Kr | |
37 | 96Rb | 103Rb |
38 | 97Sr | 103Sr |
39 | 98Y | 103Y |
40 | 99Zr | 103Zr |
41 | 100Nb | 103Nb |
42 | 101Mo | 103Mo |
43 | 102Tc | 103Tc |
44 | 103Ru | 103Ru |
45 | 104Rh | 103Rh |
46 | 105Pd | 103Pd |
47 | 106Ag | 103Ag |
48 | 107Cd | 103Cd |
49 | 108In | 103In |
50 | 109Sn | 103Sn |
51 | 110Sb | 103Sb |
52 | 111Te | |
53 | 112I | |
54 | 113Xe | |
55 | 114Cs | |
56 | 115Ba | |
57 | 116La | |
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/ruthenium-103m
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