Isotopes of tennessine
Appearance
Ununseptium (Uus) is the latest element to have been synthesized; much of the data are theoretical. It has no stable isotopes. A standard atomic mass cannot be given.
Table
nuclide symbol |
Z(p) | N(n) | isotopic mass (u) |
half-life | nuclear spin |
representative isotopic composition (mole fraction) |
range of natural variation (mole fraction) |
---|---|---|---|---|---|---|---|
excitation energy | |||||||
291Uus | 117 | 174 | 291.20656(95)# | 0.97 ns | |||
292Uus | 117 | 175 | 292.20755(101)# | 1 ns | |||
293Uus | 117 | 176 | 14 (+11, -4) ms[1] | ||||
294Uus | 117 | 177 | 78 (+370, -36) ms[1] |
Notes
- Values marked # are not purely derived from experimental data, but at least partly from systematic trends.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values from Ame2003 denote one standard deviation. Values from IUPAC are expanded uncertainties.
References
- ^ a b Yu. Ts. Oganessian et al., Synthesis of a New Element with Atomic Number Z=117, Phys. Rev. Lett. 104, 142502 (2010). DOI: 10.1103/PhysRevLett.104.142502.
External sources
- Isotope masses from Ame2003 Atomic Mass Evaluation: G. Audi, O. Bersillon, J. Blachot, A.H. Wapstra, The Nubase evaluation of nuclear and decay properties, Nucl. Phys. A729 (2003) 3-128.
- Isotopic compositions and standard atomic masses from Atomic Weights of the Elements: Review 2000 (IUPAC Technical Report). Pure Appl. Chem., Vol. 75, No. 6, pp. 683–800, (2003).