Isotopes of vanadium

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Naturally occurring vanadium (V) is composed of one stable isotope ⁵¹V and one radioactive isotope ⁵⁰V with a half-life of 1.5×10¹⁷ years. 24 artificial radioisotopes have been characterized (in the range of mass number between 40 and 65) with the most stable being ⁴⁹V with a half-life of 330 days, and ⁴⁸V 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. In 4 isotopes, metastable excited states were found (including 2 metastable states for ⁶⁰V).

The primary decay mode before the most abundant stable isotope ⁵¹V is electron capture. The next most common mode is beta decay. The primary decay products before ⁵¹V are element 22 (titanium) isotopes and the primary products after are element 24 (chromium) isotopes.
Standard atomic mass: 50.9415(1) u

[edit] Table

nuclide symbol	Z(p)	N(n)	isotopic mass (u)	half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
nuclide symbol	excitation energy			half-life	nuclear spin	representative isotopic composition (mole fraction)	range of natural variation (mole fraction)
⁴⁰V	23	17	40.01109(54)#		2-#
⁴¹V	23	18	40.99978(22)#		7/2-#
⁴²V	23	19	41.99123(21)#	<55 ns	2-#
⁴³V	23	20	42.98065(25)#	80# ms	7/2-#
⁴⁴V	23	21	43.97411(13)	111(7) ms	(2+)
^44mV	270(100)# keV			150(3) ms	(6+)
⁴⁵V	23	22	44.965776(18)	547(6) ms	7/2-
⁴⁶V	23	23	45.9602005(11)	422.50(11) ms	0+
^46mV	801.46(10) keV			1.02(7) ms	3+
⁴⁷V	23	24	46.9549089(9)	32.6(3) min	3/2-
⁴⁸V	23	25	47.9522537(27)	15.9735(25) d	4+
⁴⁹V	23	26	48.9485161(12)	329(3) d	7/2-
⁵⁰V	23	27	49.9471585(11)	1.4(4)×10¹⁷ a	6+	0.00250(4)	0.002487-0.002502
⁵¹V	23	28	50.9439595(11)	STABLE	7/2-	0.99750(4)	0.997498-0.997513
⁵²V	23	29	51.9447755(11)	3.743(5) min	3+
⁵³V	23	30	52.944338(3)	1.60(4) min	7/2-
⁵⁴V	23	31	53.946440(16)	49.8(5) s	3+
^54mV	108(3) keV			900(500) ns	(5+)
⁵⁵V	23	32	54.94723(11)	6.54(15) s	(7/2-)#
⁵⁶V	23	33	55.95053(22)	216(4) ms	(1+)
⁵⁷V	23	34	56.95256(25)	0.35(1) s	(3/2-)
⁵⁸V	23	35	57.95683(27)	191(8) ms	3+#
⁵⁹V	23	36	58.96021(33)	75(7) ms	7/2-#
⁶⁰V	23	37	59.96503(51)	122(18) ms	3+#
^60m1V	0(150)# keV			40(15) ms	1+#
^60m2V	101(1) keV			>400 ns
⁶¹V	23	38	60.96848(43)#	47.0(12) ms	7/2-#
⁶²V	23	39	61.97378(54)#	33.5(20) ms	3+#
⁶³V	23	40	62.97755(64)#	17(3) ms	(7/2-)#
⁶⁴V	23	41	63.98347(75)#	10# ms [>300 ns]
⁶⁵V	23	42	64.98792(86)#	10# ms	5/2-#

[edit] Notes

Geologically exceptional samples are known in which the isotopic composition lies outside the reported range. The uncertainty in the atomic mass may exceed the stated value for such specimens.
Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.

[edit] References

Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.