Silver-118m
Properties and data of the isotope 118Ag.
See also: list of Silver isotopes.
General data
Name of the isotope:Silver-118m; Ag-118mSymbol:118Ag or 11847AgMass number A:118 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:71Isotopic mass:117.9145955(27) u (atomic weight of Silver-118m)
Excitation energy: 127.63(10) keVNuclide mass:117.8888136 u (calculated nuclear mass without electrons)Mass excess:-79.55378 MeVMass defect:1.06839004 u (per nucleus)Nuclear binding energy:995.19891192 MeV (per nucleus)
8.43388908 MeV (average binding energy per nucleon)Half-life:2.0(2) sDecay constant λ:0.34657359027997 s-1Specific activity α:1.783858956410 × 10+21 Bq g-1
48212404227.305 Ci g-1Spin and parity:
(nuclear angular momentum)4(+)
Radioactive Decay
Half-life T½ = 2.0(2) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 118Cd | 59 % | | |
Iso | 118Ag | 41 % | | |
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 |
---|
118Ag | | 3.76(15) s | 1(-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 71) and isobaric (same nucleon number A = 118) with Silver-118m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 71 | Isobar A = 118 |
40 | 111Zr | |
41 | 112Nb | |
42 | 113Mo | 118Mo |
43 | 114Tc | 118Tc |
44 | 115Ru | 118Ru |
45 | 116Rh | 118Rh |
46 | 117Pd | 118Pd |
47 | 118Ag | 118Ag |
48 | 119Cd | 118Cd |
49 | 120In | 118In |
50 | 121Sn | 118Sn |
51 | 122Sb | 118Sb |
52 | 123Te | 118Te |
53 | 124I | 118I |
54 | 125Xe | 118Xe |
55 | 126Cs | 118Cs |
56 | 127Ba | 118Ba |
57 | 128La | 118La |
58 | 129Ce | |
59 | 130Pr | |
60 | 131Nd | |
61 | 132Pm | |
62 | 133Sm | |
63 | 134Eu | |
64 | 135Gd | |
65 | 136Tb | |
Last update: 2020-10-16
Perma link: https://www.chemlin.org/isotope/silver-118m
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