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Meitnerium-277

Properties and data of the isotope 277Mt.


Content

See also: list of Meitnerium isotopes.

 

General data

Name of the isotope:Meitnerium-277; Mt-277Symbol:277Mt or 277109MtMass number A:277 (= number of nucleons)Atomic number Z:109 (= number of protons)Neutrons N:168Isotopic mass:277.153530(710) u (atomic weight of Meitnerium-277)Nuclide mass:277.0937447 u (calculated nuclear mass without electrons)Mass excess:143.01227 MeVMass defect:2.155104376 u (per nucleus)Nuclear binding energy:2007.46679562 MeV (per nucleus)
7.24717255 MeV (average binding energy per nucleon)
Separation energy:SN = 6.376(850) MeV (first neutron)
SP = 2.466(979) MeV (first proton)
Half-life:4 msDecay constant λ:173.28679513999 s-1Specific activity α:3.767355557761 × 10+23 Bq g-1
10182042048005 Ci g-1
Spin and parity:
(nuclear angular momentum)
Year of discovery:2013

 

Radioactive Decay

Half-life T½ = 4 ms respectively 4 × 10-3 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
SFdivca. 100 %
α273Bh≤ 20 %9.90(10) MeV

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 168) and isobaric (same nucleon number A = 277) with Meitnerium-277. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 168Isobar A = 277
107275Bh277Bh
108276Hs277Hs
109277Mt277Mt
110278Ds277Ds
111279Rg277Rg
112280Cn277Cn
113281Nh

 

External data and identifiers

Adopted Levels, Gammas:NuDat 277Mt

 


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Last update: 2023-05-03


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