Vanadium-51

Properties and data of the isotope ⁵¹V.

Contents

General Data

Parent Nuclides

NMR Data

Isotones und Isobares

Literature

Vanadium-51 is a stable, naturally occuring isotope of the chemical element vanadium, which has 28 neutrons in its atomic nucleus in addition to the element-specific 23 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 51.

The discovery of the V isotope through a mass spectrographic analysis of Vanadium trichloride was reported in 1924 [1].

See also: List of individual Vanadium isotopes (and general data sources).

General data

Name of the isotope:Vanadium-51; V-51Symbol:⁵¹V or 5123VMass number A:51 (= number of nucleons)Atomic number Z:23 (= number of protons)Neutrons N:28Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):1.2173913043478 (= neutron-proton ratio)Neutron excess (N-Z):5Isotopic mass:50.94395766(10) u (atomic weight of Vanadium-51)Nuclide mass:50.9313406 u (calculated nuclear mass without electrons)Mass excess:-52.2031 MeVMass defect:0.478635724 u (per nucleus)Nuclear binding energy:445.84630509 MeV (per nucleus)
8.74208441 MeV (average binding energy per nucleon)Separation energy:S_N = 11.05118(6) MeV (first neutron)
S_P = 8.06021(7) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)7/2-Magnetic dipole moment:μ(μ_N) = +5.1464(7)Charge radius:3.6002(22) femtometer fmMirror nucleus:Nickel-51Year of discovery:1924

Parent Nuclides

Direct parent isotopes are: ⁵¹Cr, ⁵¹Ti.

Occurrence

Comparison of the natural Vanadium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Vanadium Isotopic mixture	50.9415 u	100 %
Isotope ⁵⁰V	49.94715668(10) u	0.0250(10) %	2.65 × 10¹⁷ a	6+
Isotope ⁵¹V	50.94395766(10) u	99.750(10) %	stable	7/2-

NMR data

Nuclear magnetic properties and parameters of the NMR active Nuclide ⁵¹V

Isotope:⁵¹V-NMRQuantity:99.750(10) %Spin:7/2-Nuclearmagnetic moment
μ/μ_N:+5.1464(7)Gyromagnetic ratio γ:7.0455117 · 10⁷ rad T^-1 s^-1
11.21328 MHz T^-1Nuclear g-factor:g_l = 1.4704Quadrupole moment Q:-0.052(10) barn (100 fm²)Line width parameter (factor):l = 3.68 fm⁴Resonance frequency:v₀ = 11.2133 MHz at 1 TRelative Sensitivity:[related to ¹H = 1.000]:
0.38360 (H₀ = const.)
5.5307 (v₀ = const.)
0.383 (at natural abundance)
relative receptivity as compared to ¹³C:
2250 (at natural abundance)
2256 (enriched)Reference compound:
(conditions)Pure Vanadium oxytrichloride VOCl₃ with 10% Benzene-d6 C₆D₆Frequency ratio:Ξ(⁵¹V) = 26.302948 % [based on the reference substance]Chemical shift range:ca. 1900 ppm [-1900 to 0]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 28) and isobaric (same nucleon number A = 51) with Vanadium-51. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 28	Isobar A = 51
11	³⁹Na
12	⁴⁰Mg
13	⁴¹Al
14	⁴²Si
15	⁴³P
16	⁴⁴S
17	⁴⁵Cl	⁵¹Cl
18	⁴⁶Ar	⁵¹Ar
19	⁴⁷K	⁵¹K
20	⁴⁸Ca	⁵¹Ca
21	⁴⁹Sc	⁵¹Sc
22	⁵⁰Ti	⁵¹Ti
23	⁵¹V	⁵¹V
24	⁵²Cr	⁵¹Cr
25	⁵³Mn	⁵¹Mn
26	⁵⁴Fe	⁵¹Fe
27	⁵⁵Co	⁵¹Co
28	⁵⁶Ni	⁵¹Ni
29	⁵⁷Cu
30	⁵⁸Zn
31	⁵⁹Ga
32	⁶⁰Ge

External data and identifiers

Adopted Levels, Gammas:NuDat 51V

Literature and References

[1] - F. W. Aston:
The mass-spectra of chemical elements. Part V. Accelerated anode rays.
In: The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 6, 47, (1924), DOI 10.1080/14786442408634374.

[2] - Joshua D. Hartman, Daniel Capistran:
Predicting ⁵¹V nuclear magnetic resonance observables in molecular crystals.
In: MRC, 62, 6, (2024), DOI 10.1002/mrc.5420.