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Properties and data of the isotope 286Mc.


Moscovium-286 is a radioisotope of the chemical element Moscovium, which, in addition to the element-specific 115 protons, has 171 neutrons in the atomic nucleus, resulting in the mass number 286. The very short-lived, only artificially producible, unstable and therefore radioactive nuclide has no practical significance; dealing with 286Mc is for academic purposes only.

The discovery and detection of the isotope was first reported in 2022; the synthesis succeeded through the nuclear reaction:

243Am(48Ca, 5n).

See also: list of Moscovium isotopes.


General data

Name of the isotope:Moscovium-286; Mc-286Symbol:286Mc or 286115McMass number A:286 (= number of nucleons)Atomic number Z:115 (= number of protons)Neutrons N:171Isotopic mass:286 u (atomic weight of Moscovium-286)Nuclide mass:285.9369245 u (calculated nuclear mass without electrons)Mass excess:0 MeVMass defect:2.381579316 u (per nucleus)Nuclear binding energy:2218.42684338 MeV (per nucleus)
7.75673721 MeV (average binding energy per nucleon)
Half-life:20 msDecay constant λ:34.657359027997 s-1Specific activity α:7.297604821678 × 10+22 Bq g-1
1972325627480.6 Ci g-1
Spin and parity:
(nuclear angular momentum)
Year of discovery:2021


Radioactive Decay

Half-life T½ = 20 ms respectively 2 × 10-2 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
α282Nh10.71(2) MeV


Mc-286 radioactive decay


Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 171) and isobaric (same nucleon number A = 286) with Moscovium-286. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.


OZIsotone N = 171Isobar A = 286


Literature and References

[1] - Y. T. Oganessian et al.:
New isotope 286Mc produced in the 243Am + 48Ca reaction.
In: Physical Review C, (2022), DOI 10.1103/PhysRevC.106.064306.


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Last update: 2023-05-03

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