โ–ธโ–ธ
  • ๐Ÿ‡ฌ๐Ÿ‡ง Dubnium
  • ๐Ÿ‡บ๐Ÿ‡ฆ ะ”ัƒะฑะฝั–ะน
  • ๐Ÿ‡จ๐Ÿ‡ณ ๐จง€
  • ๐Ÿ‡ณ๐Ÿ‡ฑ Dubnium
  • ๐Ÿ‡ซ๐Ÿ‡ท Dubnium
  • ๐Ÿ‡ฉ๐Ÿ‡ช Dubnium
  • ๐Ÿ‡ฎ๐Ÿ‡ฑ ื“ื•ื‘ื ื™ื•ื
  • ๐Ÿ‡ฎ๐Ÿ‡น Dubnio
  • ๐Ÿ‡ฏ๐Ÿ‡ต ใƒ‰ใƒ–ใƒ‹ใ‚ฆใƒ 
  • ๐Ÿ‡ต๐Ÿ‡น Dubnium
  • ๐Ÿ‡ช๐Ÿ‡ธ Dubnio
  • ๐Ÿ‡ธ๐Ÿ‡ช Dubnium
  • ๐Ÿ‡ท๐Ÿ‡บ ะ”ัƒะฑะฝะธะน

Dubnium - 105Db: isotope data

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 Mass / Da Natural abundance (atom %) Nuclear spin (I) Magnetic moment (μ/μN)
nil
Isotope abundances of dubnium
Isotope abundances of dubnium. In the above, 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 totals 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 / Da 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

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. For further information about radioisotopes see Jonghwa Chang's (Korea Atomic Energy Research Institute) Table of the Nuclides
  3. 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]

NMR Properties of dubnium

Common reference compound: .

Table of NMR-active nucleus propeties of dubnium
  Isotope 1 Isotope 2 Isotope 3
Isotope none
Natural abundance /% 0
Spin (I)
Frequency relative to 1H = 100 (MHz)
Receptivity, DP, relative to 1H = 1.00
Receptivity, DC, relative to 13C = 1.00
Magnetogyric ratio, γ (107 rad T‑1 s-1)
Magnetic moment, μ (μN)
Nuclear quadrupole moment, Q/millibarn
Line width factor, 1056 l (m4)

References

  1. R.K. Harris in Encyclopedia of Nuclear Magnetic Resonance, D.M. Granty and R.K. Harris, (eds.), vol. 5, John Wiley & Sons, Chichester, UK, 1996. I am grateful to Professor Robin Harris (University of Durham, UK) who provided much of the NMR data, which are copyright 1996 IUPAC, adapted from his contribution contained within this reference.
  2. J. Mason in Multinuclear NMR, Plenum Press, New York, USA, 1987. Where given, data for certain radioactive nuclei are from this reference.
  3. P. Pyykkö, Mol. Phys., 2008, 106, 1965-1974.
  4. P. Pyykkö, Mol. Phys., 2001, 99, 1617-1629.
  5. P. Pyykkö, Z. Naturforsch., 1992, 47a, 189. I am grateful to Professor Pekka Pyykkö (University of Helsinki, Finland) who provided the nuclear quadrupole moment data in this and the following two references.
  6. D.R. Lide, (ed.), CRC Handbook of Chemistry and Physics 1999-2000 : A Ready-Reference Book of Chemical and Physical Data (CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
  7. P. Pyykkö, personal communication, 1998, 204, 2008, 2010.