Tennessine-293

Properties and data of the isotope ²⁹³Ts.

Content

Tenness-293 is a radioisotope of the chemical element Tenness, which, in addition to the element-specific 117 protons, has 176 neutrons in the atomic nucleus, resulting in the mass number 293. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with ²⁹³Ts is for academic purposes only.

General data

Name of the isotope:Tennessine-293; Ts-293Symbol:²⁹³Ts or 293117TsMass number A:293 (= number of nucleons)Atomic number Z:117 (= number of protons)Neutrons N:176Isotopic mass:293.20873(84) u (atomic weight of Tennessine-293)Nuclide mass:293.1445578 u (calculated nuclear mass without electrons)Mass excess:194.43074 MeVMass defect:2.23182396 u (per nucleus)Nuclear binding energy:2078.9306278 MeV (per nucleus)
7.09532637 MeV (average binding energy per nucleon)Separation energy:S_N = 7.264(1026) MeV (first neutron)
S_P = 0.994(1090) MeV (first proton)Half-life:0.021 sDecay constant λ:33.007008598093 s^-1Specific activity α:6.784056489517 × 10⁺²² Bq g^-1
1833528780950.6 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 0.021 s respectively 2.1 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁸⁹Mc	> 94 %	11.320(50) MeV
SF	div	< 6 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 176) and isobaric (same nucleon number A = 293) with Tennessine-293. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.