Meitnerium-276

Properties and data of the isotope ²⁷⁶Mt.

Contents

General data

Name of the isotope:Meitnerium-276; Mt-276Symbol:²⁷⁶Mt or 276109MtMass number A:276 (= number of nucleons)Atomic number Z:109 (= number of protons)Neutrons N:167Isotopic mass:276.15171(57) u (atomic weight of Meitnerium-276)Nuclide mass:276.0919247 u (calculated nuclear mass without electrons)Mass excess:141.31695 MeVMass defect:2.14825946 u (per nucleus)Nuclear binding energy:2001.09079743 MeV (per nucleus)
7.25032898 MeV (average binding energy per nucleon)Separation energy:S_N = 5.525(658) MeV (first neutron)
S_P = 2.469(797) MeV (first proton)Half-life:0.69(+9-7) sDecay constant λ:1.0045611312463 s^-1Specific activity α:2.191887186515 × 10⁺²¹ Bq g^-1
59240194230.146 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2004

Radioactive Decay

Half-life T_½ = 0.69(+9-7) s respectively 6.9 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁷²Bh	ca. 100 %	10.100(10) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 167) and isobaric (same nucleon number A = 276) with Meitnerium-276. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 167	Isobar A = 276
107	²⁷⁴Bh	²⁷⁶Bh
108	²⁷⁵Hs	²⁷⁶Hs
109	²⁷⁶Mt	²⁷⁶Mt
110	²⁷⁷Ds	²⁷⁶Ds
111	²⁷⁸Rg	²⁷⁶Rg
112	²⁷⁹Cn
113	²⁸⁰Nh