Livermorium-288

Properties and data of the isotope ²⁸⁸Lv.

Contents

Livermorium-288 is a radioisotope of the chemical element livermorium, which has 172 neutrons in its atomic nucleus in addition to the element-specific 116 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 288. The very short-lived, only artificially produced, unstable and thus radioactive nuclide has no practical significance; the study of ²⁸⁸Lv is exclusively for academic purposes.

The superheavy isotope was first described in 2025; according to this, livermorium-288 was first produced by the nuclear reactions ²⁴²Pu(⁵⁰Ti,3n)²⁸⁸Lv and ²³⁸U(⁵⁴Cr,4n)²⁸⁸Lv. The report gives a half-life for the ²⁸⁸Lv nuclide of T_1/2 = 2.0+2,3-0.7 ms and an alpha particle energy of E_α = 11.08 MeV, with flerovium-284 as the direct decay product.

See also: List of individual Livermorium isotopes (and general data sources).

General data

Name of the isotope:Livermorium-288; Lv-288Symbol:²⁸⁸Lv or 288116LvMass number A:288 (= number of nucleons)Atomic number Z:116 (= number of protons)Neutrons N:172Isotopic mass:288.19702 u (atomic weight of Livermorium-288)Nuclide mass:288.1333962 u (calculated nuclear mass without electrons)Mass excess:183.52295 MeVMass defect:2.201049264 u (per nucleus)Nuclear binding energy:2050.26418312 MeV (per nucleus)
7.11897286 MeV (average binding energy per nucleon)Half-life:2.0 msDecay constant λ:346.57359027997 s^-1Specific activity α:7.246927010416 × 10⁺²³ Bq g^-1
19586289217342 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2023

Radioactive Decay

Half-life T_½ = 2.0 ms respectively 2.0 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	Details	γ energy (intensity)
α	²⁸⁴Fl			E_{α = 11.08 MeV}

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 172) and isobaric (same nucleon number A = 288) with Livermorium-288. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 172	Isobar A = 288
110	²⁸²Ds
111	²⁸³Rg
112	²⁸⁴Cn
113	²⁸⁵Nh
114	²⁸⁶Fl	²⁸⁸Fl
115	²⁸⁷Mc	²⁸⁸Mc
116	²⁸⁸Lv	²⁸⁸Lv

Literature and References

[1] - Yu. Ts. Oganessian, V. K. Utyonkov, F. Sh. Abdullin et al.:
Investigation of reactions with ⁵⁰Ti and ⁵⁴Cr for the synthesis of new elements.
In: Physical Review C, 112, 014603, (2025), DOI 10.1103/k2g4-5k7x.