Moscovium-286

Properties and data of the isotope ²⁸⁶Mc.

Contents

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 individual Moscovium isotopes (and general data sources).

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:171Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4869565217391 (= neutron-proton ratio)Neutron excess (N-Z):56Isotopic 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^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2021

Radioactive Decay

Half-life T_½ = 20 ms respectively 2 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁸²Nh		10.71(2) MeV

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.

Z	Isotone N = 171	Isobar A = 286
107	²⁷⁸Bh
110	²⁸¹Ds
111	²⁸²Rg	²⁸⁶Rg
112	²⁸³Cn	²⁸⁶Cn
113	²⁸⁴Nh	²⁸⁶Nh
114	²⁸⁵Fl	²⁸⁶Fl
115	²⁸⁶Mc	²⁸⁶Mc