Isotopes of dubnium

Isotope data
dubnium symbol icon

Naturally occurring isotopes

This table shows information about naturally occuring isotopes, their atomic masses, their natural abundances, their nuclear spins, and their magnetic moments. Further data for radioisotopes (radioactive isotopes) of dubnium are listed (including any which occur naturally) below.
Isotope Atomic mass (ma/u) Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
nil

Isotopic abundances of Db
In the above picture, the most intense ion is set to 100% since this corresponds best to the output from a mass spectrometer. This is not to be confused with the relative percentage isotope abundances which total 100% for all the naturally occurring isotopes.

Radiosotope data

Further data for naturally occuring isotopes of dubnium are listed above. This table gives information about some radiosotopes of dubnium, their masses, their half-lives, their modes of decay, their nuclear spins, and their nuclear magnetic moments.
Isotope Mass Half-life Mode of decay Nuclear spin Nuclear magnetic moment
255Db 255.1074 1.6 s α to 251Lr; SF
256Db 256.1081 2.6 s α to 252Lr; SF; EC to 256Rf
257Db 257.1079 1.5 s α to 253Lr; SF; EC to 257Rf
258Db 258.1093 4.2 s α to 254Lr; SF; EC to 258Rf
259Db 259.1097 1.2 s α to 255Lr
260Db 260.1114 1.5 s α to 256Lr; SF; EC to 260Rf
261Db 261.1121 1.8 s α to 257Lr; SF
262Db 262.11376 (16) 34 s α to 258Lr; SF; EC to 262Rf
263Db 263.1153 30 s α to 259Lr; SF

Sheffield ChemPuter isotope pattern calculator

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References

  1. Naturally occurring isotope abundances: Commission on Atomic Weights and Isotopic Abundances report for the International Union of Pure and Applied Chemistry in Isotopic Compositions of the Elements 1989, Pure and Applied Chemistry, 1998, 70, 217. [Copyright 1998 IUPAC]
  2. Masses, nuclear spins, and magnetic moments: I. Mills, T. Cvitas, K. Homann, N. Kallay, and K. Kuchitsu in Quantities, Units and Symbols in Physical Chemistry, Blackwell Scientific Publications, Oxford, UK, 1988. [Copyright 1988 IUPAC]
  3. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides

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dubnium atomic number