Vanadium-45

Properties and data of the isotope ⁴⁵V.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Vanadium-45 is a radioisotope of the chemical element vanadium, which has 22 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 45.

The discovery of the radioactive nuclide was reported in 1975 [1]: Vanadium-45 was produced by the irradiation of chromium-50 with protons of an energy of 46 MeV in the nuclear reaction

⁵⁰Cr(p,⁶He)⁴⁵V.

Identification was achieved by measuring the emitted helium-6 particles with a magnetic spectrograph.

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

General data

Name of the isotope:Vanadium-45; V-45Symbol:⁴⁵V or 4523VMass number A:45 (= number of nucleons)Atomic number Z:23 (= number of protons)Neutrons N:22Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):0.95652173913043 (= neutron-proton ratio)Neutron excess (N-Z):-1Isotopic mass:44.9657685(9) u (atomic weight of Vanadium-45)Nuclide mass:44.9531514 u (calculated nuclear mass without electrons)Mass excess:-31.88644 MeVMass defect:0.404835388 u (per nucleus)Nuclear binding energy:377.10173491 MeV (per nucleus)
8.38003855 MeV (average binding energy per nucleon)Separation energy:S_N = 16.150(7) MeV (first neutron)
S_P = 1.6268(11) MeV (first proton)Half-life:547(6) msDecay constant λ:1.2671794891407 s^-1Specific activity α:1.734348495097 × 10⁺²² Bq g^-1
468742836512.76 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Mirror nucleus:Titanium-45Year of discovery:1975

Radioactive Decay

Half-life T_½ = 547(6) ms respectively 5.47 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	⁴⁵Ti	100 %	7.1238(12) MeV

Starting nuclides and radioactive decay chain of vanadium-45

Parent Nuclides

Direct parent isotope is: ⁴⁵Cr.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^45mV	56.8(6) keV	512(13) ns	(3/2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 45) with Vanadium-45. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 22	Isobar A = 45
9	³¹F
10	³²Ne
11	³³Na
12	³⁴Mg
13	³⁵Al
14	³⁶Si
15	³⁷P	⁴⁵P
16	³⁸S	⁴⁵S
17	³⁹Cl	⁴⁵Cl
18	⁴⁰Ar	⁴⁵Ar
19	⁴¹K	⁴⁵K
20	⁴²Ca	⁴⁵Ca
21	⁴³Sc	⁴⁵Sc
22	⁴⁴Ti	⁴⁵Ti
23	⁴⁵V	⁴⁵V
24	⁴⁶Cr	⁴⁵Cr
25	⁴⁷Mn	⁴⁵Mn
26	⁴⁸Fe	⁴⁵Fe
27	⁴⁹Co
28	⁵⁰Ni

External data and identifiers

Adopted Levels, Gammas:NuDat 45V

Literature and References

[1] - D. Mueller, E. Kashy, W. Benenson, H. Nann:
Masses of T_Z = -1/2 nuclei in the 1⁢f_7/2 shell.
In: Physical Review C,12, 51, (1975), DOI 10.1103/PhysRevC.12.51.