Thallium-183m1
Properties and data of the isotope 183m1Tl.
See also: List of individual Thallium isotopes (and general data sources).
General data
Name of the isotope:Thallium-183m1; Tl-183m1Symbol:183m1Tl or 183m181TlMass number A:183 (= number of nucleons)Atomic number Z:81 (= number of protons)Neutrons N:102Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.2592592592593 (= neutron-proton ratio)Neutron excess (N-Z):21Excitation energy:628.7 keVIsotopic mass:182.982193(10) u (atomic weight of Thallium-183m1)Nuclide mass:182.937763 u (calculated nuclear mass without electrons)Mass excess:-16.58711 MeVMass defect:1.535456024 u (per nucleus)Nuclear binding energy:1430.26807362 MeV (per nucleus)
7.81567253 MeV (average binding energy per nucleon)Half-life:53.3(3) msDecay constant λ:13.004637533958 s-1Specific activity α:4.303063684720 × 10+22 Bq g-1
1162990185059.6 Ci g-1Spin and parity:
(nuclear angular momentum)(9/2-)
Radioactive Decay
Half-life T½ = 53.3(3) ms respectively 5.33 × 10-2 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| α | 179Au | 1.5(3) % | | |
| EC/β+ | 183Hg | ? | | |
| Iso | 183Tl | ? | | |
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 |
|---|
| 183Tl | | 6.9(7) s | (1/2+) |
| 183m2Tl | 975.01(23) keV | 1.48(19) μs | (13/2+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 102) and isobaric (same nucleon number A = 183) with Thallium-183m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 102 | Isobar A = 183 |
|---|
| 60 | 162Nd | |
| 61 | 163Pm | |
| 62 | 164Sm | |
| 63 | 165Eu | |
| 64 | 166Gd | |
| 65 | 167Tb | |
| 66 | 168Dy | |
| 67 | 169Ho | |
| 68 | 170Er | |
| 69 | 171Tm | |
| 70 | 172Yb | 183Yb |
| 71 | 173Lu | 183Lu |
| 72 | 174Hf | 183Hf |
| 73 | 175Ta | 183Ta |
| 74 | 176W | 183W |
| 75 | 177Re | 183Re |
| 76 | 178Os | 183Os |
| 77 | 179Ir | 183Ir |
| 78 | 180Pt | 183Pt |
| 79 | 181Au | 183Au |
| 80 | 182Hg | 183Hg |
| 81 | 183Tl | 183Tl |
| 82 | 184Pb | 183Pb |
| 83 | 185Bi | |
| 84 | 186Po | |
Last update: 2020-10-22
Perma link: https://www.chemlin.org/isotope/thallium-183m1
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