Hassium-267m

Properties and data of the isotope ²⁶⁷Hs.

Content

General data

Name of the isotope:Hassium-267m; Hs-267mSymbol:²⁶⁷Hs or 267108HsMass number A:267 (= number of nucleons)Atomic number Z:108 (= number of protons)Neutrons N:159Isotopic mass:267.13167(10) u (atomic weight of Hassium-267m)Nuclide mass:267.0724331 u (calculated nuclear mass without electrons)Mass excess:122.64981 MeVMass defect:2.0911551 u (per nucleus)Nuclear binding energy:1947.89842872 MeV (per nucleus)
7.29549973 MeV (average binding energy per nucleon)Half-life:990(90) μsDecay constant λ:700.14866723227 s^-1Specific activity α:1.579173744183 × 10⁺²⁴ Bq g^-1
42680371464416 Ci g^-1Spin and parity:
(nuclear angular momentum)9-

Radioactive Decay

Half-life T_½ = 990(90) μs respectively 9.9 × 10^-4 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	²⁶³Sg

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
²⁶⁷Hs		52 ms	5/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 159) and isobaric (same nucleon number A = 267) with Hassium-267m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 159	Isobar A = 267
100	²⁵⁹Fm
101	²⁶⁰Md
102	²⁶¹No
103	²⁶²Lr
104	²⁶³Rf	²⁶⁷Rf
105	²⁶⁴Db	²⁶⁷Db
106	²⁶⁵Sg	²⁶⁷Sg
107	²⁶⁶Bh	²⁶⁷Bh
108	²⁶⁷Hs	²⁶⁷Hs
109	²⁶⁸Mt	²⁶⁷Mt
110	²⁶⁹Ds	²⁶⁷Ds