Meitnerium-274

Properties and data of the isotope ²⁷⁴Mt.

Content

General data

Name of the isotope:Meitnerium-274; Mt-274Symbol:²⁷⁴Mt or 274109MtMass number A:274 (= number of nucleons)Atomic number Z:109 (= number of protons)Neutrons N:165Isotopic mass:274.14734(40) u (atomic weight of Meitnerium-274)Nuclide mass:274.0875547 u (calculated nuclear mass without electrons)Mass excess:137.24633 MeVMass defect:2.135299628 u (per nucleus)Nuclear binding energy:1989.01879168 MeV (per nucleus)
7.25919267 MeV (average binding energy per nucleon)Separation energy:S_N = 5.604(567) MeV (first neutron)
S_P = 1.807(531) MeV (first proton)Half-life:0.44(+81-17) sDecay constant λ:1.5753345012726 s^-1Specific activity α:3.462367251161 × 10⁺²¹ Bq g^-1
93577493274.627 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:2007

Radioactive Decay

Half-life T_½ = 0.44(+81-17) s respectively 4.4 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁷⁰Bh	ca. 100 %	10.595(230) MeV
SZ	div	?

Parent Nuclides

Direct parent isotope is: ²⁷⁸Rg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 165) and isobaric (same nucleon number A = 274) with Meitnerium-274. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 165	Isobar A = 274
105	²⁷⁰Db
106	²⁷¹Sg
107	²⁷²Bh	²⁷⁴Bh
108	²⁷³Hs	²⁷⁴Hs
109	²⁷⁴Mt	²⁷⁴Mt
110	²⁷⁵Ds	²⁷⁴Ds
111	²⁷⁶Rg	²⁷⁴Rg
112	²⁷⁷Cn
113	²⁷⁸Nh