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Standard atomic weight Ar°(V) | |||||||||||||||||||||||||||||||
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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: |
- V – Excited nuclear isomer.
- ( ) – Uncertainty (1σ) is given in concise form in parentheses after the corresponding last digits.
- # – Atomic mass marked #: value and uncertainty derived not from purely experimental data, but at least partly from trends from the Mass Surface (TMS).
- Bold half-life – nearly stable, half-life longer than age of universe.
- ^ # – Values marked # are not purely derived from experimental data, but at least partly from trends of neighboring nuclides (TNN).
-
Modes of decay:
EC: Electron capture IT: Isomeric transition
p: Proton emission - Bold symbol as daughter – Daughter product is stable.
- ( ) spin value – Indicates spin with weak assignment arguments.
- Primordial radionuclide
- See also Vanadium-51 nuclear magnetic resonance
- Order of ground state and isomer is uncertain.
References
- "Standard Atomic Weights: Vanadium". CIAAW. 1977.
- 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.
- 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.
- ^ 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.
- Isotope masses from:
- Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
- Isotopic compositions and standard atomic masses from:
- de Laeter, John Robert; Böhlke, John Karl; De Bièvre, Paul; Hidaka, Hiroshi; Peiser, H. Steffen; Rosman, Kevin J. R.; Taylor, Philip D. P. (2003). "Atomic weights of the elements. Review 2000 (IUPAC Technical Report)". Pure and Applied Chemistry. 75 (6): 683–800. doi:10.1351/pac200375060683.
- Wieser, Michael E. (2006). "Atomic weights of the elements 2005 (IUPAC Technical Report)". Pure and Applied Chemistry. 78 (11): 2051–2066. doi:10.1351/pac200678112051.
- "News & Notices: Standard Atomic Weights Revised". International Union of Pure and Applied Chemistry. 19 October 2005.
- Half-life, spin, and isomer data selected from the following sources.
- Audi, Georges; Bersillon, Olivier; Blachot, Jean; Wapstra, Aaldert Hendrik (2003), "The NUBASE evaluation of nuclear and decay properties", Nuclear Physics A, 729: 3–128, Bibcode:2003NuPhA.729....3A, doi:10.1016/j.nuclphysa.2003.11.001
- National Nuclear Data Center. "NuDat 2.x database". Brookhaven National Laboratory.
- Holden, Norman E. (2004). "11. Table of the Isotopes". In Lide, David R. (ed.). CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. ISBN 978-0-8493-0485-9.
- History of discovery: A. Shore, A. Fritsch, M. Heim, A. Schuh, M. Thoennessen. Discovery of the Vanadium Isotopes. arXiv:0907.1994 (2009).