Titanium-47
Properties and data of the isotope 47Ti.
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
Parent Nuclides
Direct parent isotopes are: 47V, 47Sc.
Occurrence
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 47Ti | 46.95175749(9) u | 7.44(2) % | stable | 5/2- |
| Isotope 46Ti | 45.95262636(10) u | 8.25(3) % | stable | 0+ |
| 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 Nuclide 47Ti
Isotope:47Ti-NMRQuantity:7.44(2) %Spin:5/2-Nuclearmagnetic moment
μ/μN:-0.78814(11)Gyromagnetic ratio γ:0 · 107 rad T-1 s-1
0.00000 MHz T-1Nuclear g-factor:gl = -0.315256Quadrupole moment Q:+ 0.302(10) barn (100 fm2)Resonance 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.
| Z | Isotone N = 25 | Isobar A = 47 |
|---|
| 11 | 36Na | |
| 12 | 37Mg | |
| 13 | 38Al | |
| 14 | 39Si | |
| 15 | 40P | 47P |
| 16 | 41S | 47S |
| 17 | 42Cl | 47Cl |
| 18 | 43Ar | 47Ar |
| 19 | 44K | 47K |
| 20 | 45Ca | 47Ca |
| 21 | 46Sc | 47Sc |
| 22 | 47Ti | 47Ti |
| 23 | 48V | 47V |
| 24 | 49Cr | 47Cr |
| 25 | 50Mn | 47Mn |
| 26 | 51Fe | 47Fe |
| 27 | 52Co | 47Co |
| 28 | 53Ni | |
| 29 | 54Cu | |
| 30 | 55Zn | |
External data and identifiers
Literature and References
[1] - Francis William Aston:
The isotopic constitution and atomic weights of hafnium, thorium, rhodium, titanium, zirconium, calcium, gallium, silver, carbon, nickel, cadmium, iron and indium.
In: Proceedings A, 149, 867, (1935), DOI 10.1098/rspa.1935.0070.
Last update: 2026-01-12
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