Nihonium-286

Properties and data of the isotope ²⁸⁶Nh.

Contents

Nihonium-286 is a radioisotope of the chemical element Nihonium, which, in addition to the element-specific 113 protons, has 173 neutrons in the atomic nucleus, from which the mass number is 286. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with ²⁸⁶Nh is for academic purposes only.

General data

Name of the isotope:Nihonium-286; Nh-286Symbol:²⁸⁶Nh or 286113NhMass number A:286 (= number of nucleons)Atomic number Z:113 (= number of protons)Neutrons N:173Isotopic mass:286.18246(63) u (atomic weight of Nihonium-286)Nuclide mass:286.1204813 u (calculated nuclear mass without electrons)Mass excess:169.9604 MeVMass defect:2.200799084 u (per nucleus)Nuclear binding energy:2050.03114195 MeV (per nucleus)
7.16794106 MeV (average binding energy per nucleon)Separation energy:S_N = 5.883(974) MeV (first neutron)
S_P = 2.419(778) MeV (first proton)Half-life:9.5 sDecay constant λ:0.072962861111573 s^-1Specific activity α:1.536337857195 × 10⁺²⁰ Bq g^-1
4152264478.9065 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010

Radioactive Decay

Half-life T_½ = 9.5 s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁸²Rg		9.790(50) MeV
SF	div

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 173) and isobaric (same nucleon number A = 286) with Nihonium-286. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.