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Isotopes of vanadium

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Isotopes of vanadium (23V)
Main isotopes Decay
abun­dance half-life (t1/2) mode pro­duct
V synth 16 d β Ti
V synth 330 d ε Ti
V 0.25% 2.71×10 y β Ti
V 99.8% stable
Standard atomic weight Ar°(V)
  • 50.9415±0.0001
  • 50.942±0.001 (abridged)

Naturally occurring vanadium (23V) is composed of one stable isotope V and one radioactive isotope V with a half-life of 2.71×10 years. 24 artificial radioisotopes have been characterized (in the range of mass number between 40 and 65) with the most stable being V with a half-life of 330 days, and V with a half-life of 15.9735 days. All of the remaining radioactive isotopes have half-lives shorter than an hour, the majority of them below 10 seconds, the least stable being V with a half-life shorter than 55 nanoseconds, with all of the isotopes lighter than it, and none of the heavier, have unknown half-lives. In 4 isotopes, metastable excited states were found (including 2 metastable states for V), which adds up to 5 meta states.

The primary decay mode before the most abundant stable isotope V is electron capture. The next most common mode is beta decay. The primary decay products before V are element 22 (titanium) isotopes and the primary products after are element 24 (chromium) isotopes.

List of isotopes


Nuclide
Z N Isotopic mass (Da)
Half-life
Decay
mode

Daughter
isotope

Spin and
parity
Natural abundance (mole fraction)
Excitation energy Normal proportion Range of variation
V 23 20 42.980766(46) 79.3(24) ms β (>97.5%) Ti 7/2−#
β, p (<2.5%) Sc
V 23 21 43.9744410(78) 111(7) ms β Ti (2)+
β, α (?%) Ca
V 271(9) keV 150(3) ms β Ti (6)+
V 23 22 44.96576850(93) 547(6) ms β Ti 7/2−
V 56.8(6) keV 512(13) ns IT V (3/2−)
V 23 23 45.96019739(14) 422.62(5) ms β Ti 0+
V 801.46(10) keV 1.02(7) ms IT V 3+
V 23 24 46.95490356(12) 32.6(3) min β Ti 3/2−
V 23 25 47.9522509(10) 15.9735(25) d β Ti 4+
V 23 26 48.94851051(88) 330(15) d EC Ti 7/2−
V 23 27 49.947156681(99) 2.71(13)×10 y β Ti 6+ 0.00250(10)
V 23 28 50.94395766(10) Stable 7/2− 0.99750(10)
V 23 29 51.94477364(17) 3.743(5) min β Cr 3+
V 23 30 52.9443349(33) 1.543(14) min β Cr 7/2−
V 23 31 53.946432(12) 49.8(5) s β Cr 3+
V 108.0(10) keV 900(500) ns IT V (5)+
V 23 32 54.947262(29) 6.54(15) s β Cr 7/2−#
V 23 33 55.95042(19) 216(4) ms β Cr (1+)
V 23 34 56.952297(91) 350(10) ms β Cr (7/2−)
V 23 35 57.95660(10) 191(10) ms β Cr (1+)
V 23 36 58.95962(15) 95(6) ms β (<97%) Cr (5/2−)
β, n (>3%) Cr
V 23 37 59.96448(20) 122(18) ms β (>99.9%) Cr 3+#
V 0(150)# keV 40(15) ms β Cr 1+#
V 203.7(7) keV 230(24) ns IT V (4+)
V 23 38 60.96760(25) 48.2(6) ms β (85.5%) Cr (3/2−)
β, n (14.5%) Cr
V 23 39 61.97293(28) 33.6(23) ms β Cr 3+#
V 23 40 62.97666(37) 19.6(9) ms β (<65%) Cr (3/2−,5/2−)
β, n (>35%) Cr
V 23 41 63.98248(43)# 15(2) ms β Cr (1,2)
V 81.0(7) keV <1 μs IT V
V 23 42 64.98700(54)# 14# ms
5/2−#
V 23 43 65.99324(54)# 10# ms
V 23 44 66.99813(64)# 8# ms
5/2−#
This table header & footer:
  1. V – Excited nuclear isomer.
  2. ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
  3. # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
  4. Bold half-life – nearly stable, half-life longer than age of universe.
  5. ^ # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
  6. Modes of decay:
    EC: Electron capture
    IT: Isomeric transition


    p: Proton emission
  7. Bold symbol as daughter – Daughter product is stable.
  8. ( ) spin value – Indicates spin with weak assignment arguments.
  9. Primordial radionuclide
  10. See also Vanadium-51 nuclear magnetic resonance
  11. Order of ground state and isomer is uncertain.

References

  1. "Standard Atomic Weights: Vanadium". CIAAW. 1977.
  2. Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. Wang, Meng; Huang, W.J.; Kondev, F.G.; Audi, G.; Naimi, S. (2021). "The AME 2020 atomic mass evaluation (II). Tables, graphs and references*". Chinese Physics C. 45 (3): 030003. doi:10.1088/1674-1137/abddaf.
  4. ^ Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.
Isotopes of the chemical elements
Group 1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Period Hydrogen and
alkali metals
Alkaline
earth metals
Pnicto­gens Chal­co­gens Halo­gens Noble gases
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