Livermorium-290

Properties and data of the isotope ²⁹⁰Lv.

Content

Livermorium-290 is a radioisotope of the chemical element livermorium, which, in addition to the element-specific 116 protons, has 174 neutrons in the atomic nucleus, resulting in the mass number 290. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with ²⁹⁰Lv is for academic purposes only.

General data

Name of the isotope:Livermorium-290; Lv-290Symbol:²⁹⁰Lv or 290116LvMass number A:290 (= number of nucleons)Atomic number Z:116 (= number of protons)Neutrons N:174Isotopic mass:290.19864(59) u (atomic weight of Livermorium-290)Nuclide mass:290.1350162 u (calculated nuclear mass without electrons)Mass excess:185.03197 MeVMass defect:2.216759096 u (per nucleus)Nuclear binding energy:2064.89779737 MeV (per nucleus)
7.12033723 MeV (average binding energy per nucleon)Separation energy:S_N = 7.501(747) MeV (first neutron)
S_P = 2.944(953) MeV (first proton)Half-life:0.0083(+35-19) sDecay constant λ:83.511708501198 s^-1Specific activity α:1.734204386373 × 10⁺²³ Bq g^-1
4687038882089.5 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2004

Radioactive Decay

Half-life T_½ = 0.0083(+35-19) s respectively 8.3 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁸⁶Fl	> 92 %	10.997(58) MeV
SF	div	≤ 8 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 174) and isobaric (same nucleon number A = 290) with Livermorium-290. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.