Tantalum-180
Properties and data of the isotope 180Ta.
See also: List of individual Tantalum isotopes (and general data sources).
General data
Name of the isotope:Tantalum-180; Ta-180Symbol:180Ta or 18073TaMass number A:180 (= number of nucleons)Atomic number Z:73 (= number of protons)Neutrons N:107Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4657534246575 (= neutron-proton ratio)Neutron excess (N-Z):34Isotopic mass:179.9474684(21) u (atomic weight of Tantalum-180)Nuclide mass:179.907426 u (calculated nuclear mass without electrons)Mass excess:-48.93287 MeVMass defect:1.550904948 u (per nucleus)Nuclear binding energy:1444.65865363 MeV (per nucleus)
8.02588141 MeV (average binding energy per nucleon)Separation energy:SN = 6.6469(23) MeV (first neutron)
SP = 5.7589(23) MeV (first proton)Half-life:8.154(6) hDecay constant λ:2.361305904940 × 10-5 s-1Specific activity α:7.944199314499 × 10+16 Bq g-1
2147080.8958106 Ci g-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1938
Radioactive Decay
Half-life T½ = 8.154(6) h (hours) respectively 2.93544 × 104 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC | 180Hf | 85(3) % | 0.8465(24) MeV | |
| β- | 180W | 15(3) % | 0.7032(23) MeV | |
Parent Nuclides
Direct parent isotope is: 180Hf.
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 |
|---|
| 180mTa | 76.79(55) keV | 7.1 × 1015 a | 9- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 180) with Tantalum-180. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 107 | Isobar A = 180 |
|---|
| 65 | 172Tb | |
| 66 | 173Dy | |
| 67 | 174Ho | |
| 68 | 175Er | |
| 69 | 176Tm | |
| 70 | 177Yb | 180Yb |
| 71 | 178Lu | 180Lu |
| 72 | 179Hf | 180Hf |
| 73 | 180Ta | 180Ta |
| 74 | 181W | 180W |
| 75 | 182Re | 180Re |
| 76 | 183Os | 180Os |
| 77 | 184Ir | 180Ir |
| 78 | 185Pt | 180Pt |
| 79 | 186Au | 180Au |
| 80 | 187Hg | 180Hg |
| 81 | 188Tl | 180Tl |
| 82 | 189Pb | 180Pb |
| 83 | 190Bi | |
| 84 | 191Po | |
| 85 | 192At | |
| 86 | 193Rn | |
External data and identifiers
Last update: 2023-01-02
Perma link: https://www.chemlin.org/isotope/tantalum-180
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