Flerovium-284

Properties and data of the isotope ¹⁸⁴Fl.

Content

Flerovium-284 is a radioisotope of the chemical element flerovium, which, in addition to the element-specific 114 protons, has 170 neutrons in the atomic nucleus, resulting in the mass number 284. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with ²⁸⁴Fl is for academic purposes only.

General data

Name of the isotope:Flerovium-284; Fl-284Symbol:¹⁸⁴Fl or 184114FlMass number A:184 (= number of nucleons)Atomic number Z:114 (= number of protons)Neutrons N:170Isotopic mass:284.18119(70) u (atomic weight of Flerovium-284)Nuclide mass:284.1186629 u (calculated nuclear mass without electrons)Mass excess:93318.1774 MeVMass defect:2.183899368 u (per nucleus)Nuclear binding energy:2034.2891579 MeV (per nucleus)
11.05591934 MeV (average binding energy per nucleon)Separation energy:
S_P = 3.073(788) MeV (first proton)Half-life:2.5 msDecay constant λ:277.25887222398 s^-1Specific activity α:5.879197123943 × 10⁺²³ Bq g^-1
15889721956605 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:2015

Radioactive Decay

Half-life T_½ = 2.5 ms respectively 2.5 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
SF	div	≥ 75 %
α	²⁸⁰Cn	≤ 25 %	10.7(3) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 170) and isobaric (same nucleon number A = 184) with Flerovium-284. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.