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The term moscovium isotopes summarizes variants of atoms that are assigned to the chemical element moscovium (Mc). A Mc atom is characterized by 115 protons in the nucleus and - in the uncharged state - 115 electrons. The individual Mc isotopes differ in the number of neutrons; the sum of these nucleons is the mass number. The Mc atomic nuclei composed of the neutrons and protons specific to a Mc isotope are also referred to as moscovium nuclides.
All known moscovium isotopes are extremely short-lived with half-lives of well under one second, radioactive and can only be produced with a considerable amount of equipment. Dealing with these atoms is for research purposes only, including elucidating the structure of matter and investigating the properties of the superheavy elements. There are no practical or technical applications for the Mc isotopes.
Five Moscovium isotopes with mass numbers from 286 to 290 are currently known. At 650 ms, 290Mc has the longest half-life. All nuclides decay into the corresponding nihonium isotopes while emitting α-rays.
The artificial nucleosynthesis of the Mc-isotopes occurs through bombardment and nuclear reaction of americium-243 or berkelium-249 with Calcium-48 atomic nuclei (see respective Mc isotope) and under neutron emission.
| Isotope Nuclide | E | N | Atomic Mass [Nuclear Mass] {Mass Excess} | Spin I (h/2π) | Parent |
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
| Moscovium-286 | 286115Mc | 171 | 286 u [285.9369245 u] {0 MeV} | ||
| Moscovium-287 | 287115Mc | 172 | 287.19082(48) u [287.1277445 u] {177.74769 MeV} | ||
| Moscovium-288 | 288115Mc | 173 | 288.19288(58) u [288.1298045 u] {179.66656 MeV} | ||
| Moscovium-289 | 289115Mc | 174 | 289.19397(83) u [289.1308945 u] {180.68189 MeV} | ||
| Moscovium-290 | 290115Mc | 175 | 290.19624(64) u [290.1331645 u] {182.79638 MeV} |
| Isotope | Radioactive Decay | Extern | |||
|---|---|---|---|---|---|
| Half-life | Decay Mode | Probability | Energy | ||
| 7 | 8 | 9 | 10 | 11 | 12 |
| Mc-286 | 20 ms | α → 282Nh | 10.71(2) MeV | ||
| Mc-287 | 37 ms | α → 283Nh SF div | ≥ 75 % ≤ 25 % | 10.760(71) MeV | AL |
| Mc-288 | 0.17 s | α → 284Nh | 100 % | 10.65(5) MeV | AL |
| Mc-289 | 0.296 s | α → 285Nh SF div | > 95 % < 5 % | 10.49(5) MeV | AL |
| Mc-290 | 0.65 s | α → 286Nh SF div | < 100 % ? | 10.41(4) MeV | |
Notes (related to the columns):
1 - name of the nuclide, isotope.
2 - E: isotope symbol with mass number (superscript; number of nucleons) and Atomic number (subscript; number of protons).
3 - N: number of neutrons.
4 - relative atomic mass of the Moscovium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
5 - nuclear spin I, unit: h/2π.
6 - source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
7 - isotope notation in short form.
8 - decay: half-live of the Moscovium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
9 - decay mode: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
10 - decay probability in percent (%).
11 - decay energy; Particle energy related to decay type.
12 - other information and notes: AL = Adopted Levels (link to external data [1]).
Miscellaneous:
()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
- unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.
Properties of the Moscovium nucleides
[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.
[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.
[3] - Live Chart of Nuclides. Nuclear structure and decay data.
Moscovium: NMR properties
[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.
[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.
[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.
[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).
More sources:
[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.
Last update: 2022-12-18
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