Silver-117m
Properties and data of the isotope 117Ag.
See also: list of Silver isotopes.
General data
Name of the isotope:Silver-117m; Ag-117mSymbol:117Ag or 11747AgMass number A:117 (= number of nucleons)Atomic number Z:47 (= number of protons)Neutrons N:70Isotopic mass:116.911774(15) u (atomic weight of Silver-117m)
Excitation energy: 28.6(2) keVNuclide mass:116.8859921 u (calculated nuclear mass without electrons)Mass excess:-82.18199 MeVMass defect:1.062546624 u (per nucleus)Nuclear binding energy:989.75580498 MeV (per nucleus)
8.45945132 MeV (average binding energy per nucleon)Half-life:5.34(5) sDecay constant λ:0.12980284280149 s-1Specific activity α:6.738715546299 × 10+20 Bq g-1
18212744719.729 Ci g-1Spin and parity:
(nuclear angular momentum)(7/2+)
Radioactive Decay
Half-life T½ = 5.34(5) s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
β- | 117Cd | 94.0(15) % | | |
Iso | 117Ag | 6.0(15) % | | |
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 |
---|
117Ag | | ca. 72.8 s | (1/2-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 70) and isobaric (same nucleon number A = 117) with Silver-117m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 70 | Isobar A = 117 |
39 | 109Y | |
40 | 110Zr | |
41 | 111Nb | |
42 | 112Mo | 117Mo |
43 | 113Tc | 117Tc |
44 | 114Ru | 117Ru |
45 | 115Rh | 117Rh |
46 | 116Pd | 117Pd |
47 | 117Ag | 117Ag |
48 | 118Cd | 117Cd |
49 | 119In | 117In |
50 | 120Sn | 117Sn |
51 | 121Sb | 117Sb |
52 | 122Te | 117Te |
53 | 123I | 117I |
54 | 124Xe | 117Xe |
55 | 125Cs | 117Cs |
56 | 126Ba | 117Ba |
57 | 127La | 117La |
58 | 128Ce | |
59 | 129Pr | |
60 | 130Nd | |
61 | 131Pm | |
62 | 132Sm | |
63 | 133Eu | |
64 | 134Gd | |
65 | 135Tb | |
Last update: 2020-10-16
Perma link: https://www.chemlin.org/isotope/silver-117m
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