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All atomic nuclei of the chemical element titanium are summarized under titanium isotopes; these all consist of an atomic nucleus with 22 protons and, in the uncharged state, 22 electrons. The difference between each titanium isotope is based on the number of neutrons in the nucleus.
Titanium occurs naturally in the form of its stable isotopes Ti-46 to Ti-50; the atomic nuclei of all other titanium isotopes are man-made radionuclides.
| Atomic Mass ma | Quantity | Half-life | Spin | |
| Titanium Isotopic mixture | 47,867 u | 100 % | ||
| Isotope 46Ti | 45,952628(3) u | 8,25(3) % | stable | 0+ |
| Isotope 47Ti | 46,951759(3) u | 7,44(2) % | stable | 5/2- |
| Isotope 48Ti | 47,947942(3) u | 73,72(3) % | stable | 0+ |
| Isotope 49Ti | 48,947866(3) u | 5,41(2) % | stable | 7/2- |
| Isotope 50Ti | 49,944787(3) u | 5,18(2) % | stable | 0+ |
| Isotope Nuclide | E | N | Atomic Mass [Nuclear Mass] {Mass Excess} | Spin I (h/2π) | Parent |
|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 |
| Titanium-38 | 3822Ti | 16 | 38.01167(32) u [37.9996015 u] {10.87053 MeV} | 0+ | |
| Titanium-39 | 3922Ti | 17 | 39.00236(21) u [38.9902915 u] {2.19833 MeV} | (3/2+) | 40V |
| Titanium-40 | 4022Ti | 18 | 39.99050(17) u [39.9784315 u] {-8.84919 MeV} | 0+ | 41V 42Cr |
| Titanium-41 | 4122Ti | 19 | 40.98315(3) u [40.9710815 u] {-15.69567 MeV} | 3/2+ | 42V |
| Titanium-42 | 4222Ti | 20 | 41.9730490(3) u [41.9609805 u] {-25.10469 MeV} | 0+ | 43Cr |
| Titanium-43 | 4322Ti | 21 | 42.968523(8) u [42.9564545 u] {-29.32064 MeV} | 7/2- | 43V |
| Titanium-43m1 | 43m122Ti | 21 | 42.968523(8) u [42.9564545 u] {-29.32064 MeV} | (3/2+) | |
| Titanium-43m2 | 43m222Ti | 21 | 42.968523(8) u [42.9564545 u] {-29.32064 MeV} | (19/2-) | |
| Titanium-44 | 4422Ti | 22 | 43.9596901(8) u [43.9476216 u] {-37.54843 MeV} | 0+ | 44V |
| Titanium-45 | 4522Ti | 23 | 44.9581256(11) u [44.9460571 u] {-39.00575 MeV} | 7/2- | 45V |
| Titanium-46 | 4622Ti | 24 | 45.952628(3) u [45.9405595 u] {-44.12673 MeV} | 0+ | 46V 46Sc 46Ca |
| Titanium-47 | 4722Ti | 25 | 46.951759(3) u [46.9396905 u] {-44.9362 MeV} | 5/2- | 47V 47Sc |
| Titanium-48 | 4822Ti | 26 | 47.947942(3) u [47.9358735 u] {-48.49171 MeV} | 0+ | 48V 48Sc 48Ca |
| Titanium-49 | 4922Ti | 27 | 48.947866(3) u [48.9357975 u] {-48.56251 MeV} | 7/2- | 49V 49Sc |
| Titanium-50 | 5022Ti | 28 | 49.944787(3) u [49.9327185 u] {-51.43058 MeV} | 0+ | 50V 50Sc 50Cr |
| Titanium-51 | 5122Ti | 29 | 50.9466096(5) u [50.9345411 u] {-49.73284 MeV} | 3/2- | 51Sc |
| Titanium-52 | 5222Ti | 30 | 51.946892(8) u [51.9348235 u] {-49.46978 MeV} | 0+ | 52Sc |
| Titanium-53 | 5322Ti | 31 | 52.94972(11) u [52.9376515 u] {-46.83552 MeV} | (3/2)- | 53Sc |
| Titanium-54 | 5422Ti | 32 | 53.95102(9) u [53.9389515 u] {-45.62458 MeV} | 0+ | 54Sc |
| Titanium-55 | 5522Ti | 33 | 54.95527(17) u [54.9432015 u] {-41.66573 MeV} | (1/2)- | 55Sc |
| Titanium-56 | 5622Ti | 34 | 55.95779(13) u [55.9457215 u] {-39.31836 MeV} | 0+ | 56Sc |
| Titanium-57 | 5722Ti | 35 | 56.96359(28) u [56.9515215 u] {-33.9157 MeV} | (5/2-) | 57Sc |
| Titanium-58 | 5822Ti | 36 | 57.96660(21) u [57.9545315 u] {-31.1119 MeV} | 0+ | 58Sc |
| Titanium-59 | 5922Ti | 37 | 58.97261(21) u [58.9605415 u] {-25.51362 MeV} | (5/2-) | 59Sc |
| Titanium-60 | 6022Ti | 38 | 59.97603(32) u [59.9639615 u] {-22.32791 MeV} | 0+ | 60Sc |
| Titanium-61 | 6122Ti | 39 | 60.98245(43) u [60.9703815 u] {-16.34772 MeV} | (1/2-) | |
| Titanium-62 | 6222Ti | 40 | 61.98658(43) u [61.9745115 u] {-12.50065 MeV} | 0+ | |
| Titanium-63 | 6322Ti | 41 | 62.99383(54) u [62.9817615 u] {-5.74732 MeV} | 1/2- |
| Isotope | Radioactive Decay | Extern | |||
|---|---|---|---|---|---|
| Half-life | Decay Mode | Probability | Energy | ||
| 7 | 8 | 9 | 10 | 11 | 12 |
| Ti-38 | 120 ns | 2p → 36Ca | ? | AL | |
| Ti-39 | 28.5(9) ms | EC β+ → 39Sc EC p; EC 2p | ? | 16.37(20) MeV | AL |
| Ti-40 | 52.4(3) ms | EC → 40Sc EC, p → 39Ca | 56.99 % 43.01 % | 11.67(16) MeV | AL |
| Ti-41 | 81.9(5) ms | EC, p → 40Ca EC → 41Sc | > 99.9 % < 0.1 % | 12.945(28) MeV | AL |
| Ti-42 | 208.65(80) ms | EC/β+ → 42Sc | 100 % | 7.0165(3) MeV | AL |
| Ti-43 | 509(5) ms | EC/β+ → 43Sc EC, p 42Ca | 100 % ? | 6.867(7) MeV | AL |
| Ti-43m1 | 11.9(3) μs | AL | |||
| Ti-43m2 | 556(6) ns | AL | |||
| Ti-44 | 59.1(3) a | EC → 44Sc | 100 % | 0.2674(19) MeV | AL |
| Ti-45 | 184.8(5) min | EC β+ → 45Sc | 100 % | 2.0621(11) MeV | AL |
| Ti-46 | stable | AL | |||
| Ti-47 | stable | AL | |||
| Ti-48 | stable | AL | |||
| Ti-49 | stable | AL | |||
| Ti-50 | stable | AL | |||
| Ti-51 | 5.76(1) min | β- → 51V | 100 % | 2.4710(6) MeV | AL |
| Ti-52 | 1.7(1) min | β- → 52V | 100 % | 1.974(7) MeV | AL |
| Ti-53 | 32.7(9) s | β- → 53V | 100 % | 5.02(10) MeV | AL |
| Ti-54 | 2.1 s | β- → 54V | 100 % | 4.27(8) MeV | AL |
| Ti-55 | 1.3(1) s | β- → 55V | 100 % | 7.48(16) MeV | AL |
| Ti-56 | 200(5) ms | β- → 56V β-, n → 55V | 100 % | 6.83(19) MeV 1.75(15) MeV | AL |
| Ti-57 | 98(5) ms | β- → 57V β-, n → 56V | 100 % ? | 10.50(27) MeV 4.17(31) MeV | AL |
| Ti-58 | 58(9) ms | β- → 58V β-, n → 57V | 100 % ? | 9.29(22) MeV 5.23(22) MeV | AL |
| Ti-59 | 28.5(25) ms | β- → 59V | 100 % | 12.32(26) MeV | AL |
| Ti-60 | 22(2) ms | β- → 60V β-, n → 59V β-, 2n → 58V | 100 % ? ? | 10.91(37) MeV 7.43(34) MeV | AL |
| Ti-61 | 15(4) ms | β- → 61V β-, n → 60V β-, 2n → 59V | 100 % ? ? | 14.16(98) MeV 8.82(46) MeV | AL |
| Ti-62 | 620 ns | β-, → 62V β-, n → 61V | ? ? | 12.98(50) MeV 9.93(98) MeV | AL |
| Ti-63 | 360 ns | β-, → 63V β-, n → 62V | ? ? | 16.14(64) MeV 11.65(58) MeV | AL |
Notes (related to the columns):
1 - name of the nuclide, isotope.
2 - E: isotope symbol with mass number (superscript; number of nucleons) and Atomic number (subscript; number of protons).
3 - N: number of neutrons.
4 - relative atomic mass of the Titanium isotope (isotopic mass including electrons) and the mass of the atomic nucleus in square brackets (nuclear mass, nuclide mass without electrons), each related to 12C = 12.00000 [2]. In addition, the mass excess is given in MeV.
5 - nuclear spin I, unit: h/2π.
6 - source nuclides: Possible, assumed or actual source nuclides (mother nuclides, parent nuclides). If applicable, the corresponding decay modes can be found in the data for the respective starting nuclide.
7 - isotope notation in short form.
8 - decay: half-live of the Titanium isotope (a = years; ; d = days; h = hours; min = minutes; s = seconds).
9 - decay mode: type of decay into the respective daughter nuclides with n = neutron emission; p = proton emission; α = alpha decay; β- = beta minus decay with electron emission; EC = electron capture; β+ = positron emission; ε = β+ and/or EC; Iso = isomeric transition; CD = cluster decay; SF = spontaneous decay.
10 - decay probability in percent (%).
11 - decay energy; Particle energy related to decay type.
12 - other information and notes: AL = Adopted Levels (link to external data [1]).
Miscellaneous:
()- Numbers in brackets: uncertainty to represent the spread of the reported value.
~ - Theoretical values or systematic trends.
- unlisted-: Nuclides that have already been mentioned in the literature but for some reason can no longer be found in the current nuclide tables because their discovery e.g. has not confirmed.
| Nuclide quantity 1) spin | Nuclear magnetic moment μ/μN | Gyromagnetic ratio {Quadrupole moment} | Resonant frequency v0 bei 1 T | Relative sensitivity H0 = const. v0 = const. 3) |
|---|---|---|---|---|
| 47Ti 7,44(2) % 5/2- | -0,78814(11) | - 1,5105 {+ 0,302(10)} | 2,4041 | 0,00210 0,6588 |
| 49Ti 5,41(2) % 7/2- | -1,10370(14) | - 1,5109 {+ 0,247(11)} | 2,4048 | 0,00378 1,1861 |
1) Quantity Percentage of natural occurrence.
2) Gyromagnetic ratio: 107 rad T-1 s-1
Quadrupole moment: Q [barn] = [100 fm2]
3) Related to 1H = 1,000.
According to the Radiation Protection Ordinance (StrlSchV 2018, Germany), the following values (columns 1 to 7) apply to the handling of Titanium radionuclides:
| Nuclide | Limit Value | HASS limit | SC | Daughter Nuclides | Half-life | |
|---|---|---|---|---|---|---|
| Ti-44+ | 105 Bq | 0,1 Bq/g | 0,03 TBq | Sc-44 | 60.0 a | |
| Ti-45 | 106 Bq | 10 Bq/g | 3.1 h | |||
(HASS = High-Activity Sealed Radioactive Sources; SC = surface contamination)
Properties of the Titanium nucleides
[1] - NuDat: National Nuclear Data Center, Brookhaven National Laboratory, based on ENSDF and the Nuclear Wallet Cards.
[2] - G. Audi et. al.: The NUBASE evaluation of nuclear and decay properties. Nuclear Physics, (2003), DOI 10.1016/j.nuclphysa.2003.11.001.
[3] - Live Chart of Nuclides. Nuclear structure and decay data.
Titanium: NMR properties - 47Ti-NMR, 49Ti-NMR
[4] - N. J. Stone: Table of nuclear magnetic dipole and electric quadrupole moments. Atomic Data and Nuclear Data Tables, (2005), DOI 10.1016/j.adt.2005.04.001.
[5] - Pekka Pyykkö: Year-2008 nuclear quadrupole moments. Molecular Physics, (2008), DOI 10.1080/00268970802018367.
[6] - Pekka Pyykkö: Year-2017 nuclear quadrupole moments. Molecular Physics, (2018), DOI 10.1080/00268976.2018.1426131.
[7] - N. J. Stone: Table of recommended nuclear magnetic dipole moments. IAEA, (2019).
More sources:
[8] - Isotopic abundances, atomic weights and isotopic masses: see respective keyword.
[9] - D. Meierfrankenfeld, A. Bury, M. Thoennessen:
Discovery of scandium, titanium, mercury, and einsteinium isotopes.
In: Atomic Data and Nuclear Data Tables, (2011), DOI 10.1016/j.adt.2010.11.001.
Last update: 2022-12-12
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