Antimony-118m2
Properties and data of the isotope 118m2Sb.
See also: List of individual Antimony isotopes (and general data sources).
General data
Name of the isotope:Antimony-118m2; Sb-118m2Symbol:118m2Sb or 118m251SbMass number A:118 (= number of nucleons)Atomic number Z:51 (= number of protons)Neutrons N:67Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3137254901961 (= neutron-proton ratio)Neutron excess (N-Z):16Excitation energy:250(6) keVIsotopic mass:117.905532(3) u (atomic weight of Antimony-118m2)Nuclide mass:117.8775561 u (calculated nuclear mass without electrons)Mass excess:-87.99638 MeVMass defect:1.074094004 u (per nucleus)Nuclear binding energy:1000.51212016 MeV (per nucleus)
8.47891627 MeV (average binding energy per nucleon)Half-life:5.00(2) hDecay constant λ:3.850817669777 × 10-5 s-1Specific activity α:1.982065507122 × 10+17 Bq g-1
5356933.8030338 Ci g-1Spin and parity:
(nuclear angular momentum)8-Magnetic dipole moment:μ(μN) = 2.32(4)Quadrupole moment Q:0.57(14) barn (100 fm2)Nuclear g-factor:gl = 0.29
Radioactive Decay
Half-life T½ = 5.00(2) h (hours) respectively 1.8000 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 118Sn | 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 |
|---|
| 118Sb | | 3.6(1) min | 1+ |
| 118m1Sb | 50.814(21) s | 20.6(6) μs | (3)+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 67) and isobaric (same nucleon number A = 118) with Antimony-118m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 67 | Isobar A = 118 |
|---|
| 38 | 105Sr | |
| 39 | 106Y | |
| 40 | 107Zr | |
| 41 | 108Nb | |
| 42 | 109Mo | 118Mo |
| 43 | 110Tc | 118Tc |
| 44 | 111Ru | 118Ru |
| 45 | 112Rh | 118Rh |
| 46 | 113Pd | 118Pd |
| 47 | 114Ag | 118Ag |
| 48 | 115Cd | 118Cd |
| 49 | 116In | 118In |
| 50 | 117Sn | 118Sn |
| 51 | 118Sb | 118Sb |
| 52 | 119Te | 118Te |
| 53 | 120I | 118I |
| 54 | 121Xe | 118Xe |
| 55 | 122Cs | 118Cs |
| 56 | 123Ba | 118Ba |
| 57 | 124La | 118La |
| 58 | 125Ce | |
| 59 | 126Pr | |
| 60 | 127Nd | |
| 61 | 128Pm | |
| 62 | 129Sm | |
| 63 | 130Eu | |
Last update: 2020-10-17
Perma link: https://www.chemlin.org/isotope/antimony-118m2
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