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:7.902370988272 × 10+16 Bq g-1 2135775.9427764 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.
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.
