Titanium-47 is a stable, naturally occurring isotope of the chemical element titanium, which has 25 neutrons in its atomic nucleus in addition to the element-specific 22 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 47.
The discovery and mass determination of titanium-47 during the investigation of Titanium tetrafluoride with a spectrograph was reported in 1935 [1].
See also: List of individual Titanium isotopes (and general data sources).
General data
Name of the isotope:Titanium-47; Ti-47Symbol:47Ti or 4722TiMass number A:47 (= number of nucleons)Atomic number Z:22 (= number of protons)Neutrons N:25Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.1363636363636 (= neutron-proton ratio)Neutron excess (N-Z):3Isotopic mass:46.95175749(9) u (atomic weight of Titanium-47)Nuclide mass:46.939689 u (calculated nuclear mass without electrons)Mass excess:-44.93761 MeVMass defect:0.437016114 u (per nucleus)Nuclear binding energy:407.07788809 MeV (per nucleus) 8.66123166 MeV (average binding energy per nucleon)Separation energy:SN = 8.88066(6) MeV (first neutron) SP = 10.4649(7) MeV (first proton)Half-life:stableSpin and parity: (nuclear angular momentum)5/2-Isobaric spin: 3/2Magnetic dipole moment:μ(μN) = -0.78814(11)Charge radius:3.5962(19) femtometer fmMirror nucleus:Manganese-47Year of discovery:1934
Comparison of the natural Titanium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Titanium Isotopic mixture
47.867 u
100 %
Isotope 46Ti
45.95262636(10) u
8.25(3) %
stable
0+
Isotope 47Ti
46.95175749(9) u
7.44(2) %
stable
5/2-
Isotope 48Ti
47.94794068(8) u
73.72(3) %
stable
0+
Isotope 49Ti
48.94786439(8) u
5.41(2) %
stable
7/2-
Isotope 50Ti
49.94478562(9) u
5.18(2) %
stable
0+
NMR data
Nuclear magnetic properties and parameters of the NMR active Nuclide47Ti
Isotope:47Ti-NMRQuantity:7.44(2) %Spin:5/2-Nuclearmagnetic moment μ/μN:-0.78814(11)Gyromagnetic ratio γ:-1.5105 · 107 rad T-1 s-1 -2.40404 MHz T-1Nuclear g-factor:gl = -0.315256Quadrupole moment Q:+0.302(10) barn (100 fm2)Line width parameter (factor):l = 291.85 fm4Resonance frequency:v0 = 2.4041 MHz at 1 TRelative Sensitivity:[related to 1H = 1.000]: 0.00210 (H0 = const.) 0.6588 (v0 = const.) 0.000156 (at natural abundance) relative receptivity as compared to 13C: 0.918 (at natural abundance) 12.3 (enriched)Reference compound: (conditions)Pure titanium tetrachloride TiCl4, mixed with 10% cyclohexane-d12 C6D12 (for field/frequency lock purposes).Frequency ratio:Ξ(47Ti) = 5.637534 % [based on the reference substance]Chemical shift range:ca. 2800 ppm [-1400 to +1400]
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 25) and isobaric (same nucleon number A = 47) with Titanium-47. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
