Naturally occurring Titanium (Ti) is composed of 5 stable isotopes; 46Ti, 47Ti, 48Ti, 49Ti and 50Ti with 48Ti being the most abundant (73.8% natural abundance). Eleven radioisotopes have been characterized, with the most stable being 44Ti with a half-life of 63 years, 45Ti with a half-life of 184.8 minutes, 51Ti with a half-life of 5.76 minutes, and 52Ti with a half-life of 1.7 minutes. All of the remaining radioactive isotopes have half-lives that are less than 33 seconds and the majority of these have half-lives that are less than half a second.[1]
Additional recommended knowledge
The isotopes of titanium range in atomic weight from 39.99 u (40Ti) to 57.966 u (58Ti). The primary decay mode before the most abundant stable isotope, 48Ti, is electron capture and the primary mode after is beta emission. The primary decay products before 48Ti are element 21 (scandium) isotopes and the primary products after are element 23 (vanadium) isotopes.[1]
Standard atomic mass: 47.867(1) u
Table
nuclide symbol
| Z(p)
| N(n)
| isotopic mass (u)
| half-life
| nuclear spin
| representative isotopic composition (mole fraction)
| range of natural variation (mole fraction)
|
excitation energy
|
38Ti
| 22
| 16
| 38.00977(27)#
| <120 ns
| 0+
|
|
|
39Ti
| 22
| 17
| 39.00161(22)#
| 31(4) ms [31(+6-4) ms]
| 3/2+#
|
|
|
40Ti
| 22
| 18
| 39.99050(17)
| 53.3(15) ms
| 0+
|
|
|
41Ti
| 22
| 19
| 40.98315(11)#
| 80.4(9) ms
| 3/2+
|
|
|
42Ti
| 22
| 20
| 41.973031(6)
| 199(6) ms
| 0+
|
|
|
43Ti
| 22
| 21
| 42.968522(7)
| 509(5) ms
| 7/2-
|
|
|
43m1Ti
| 313.0(10) keV
| 12.6(6) µs
| (3/2+)
|
|
|
43m2Ti
| 3066.4(10) keV
| 560(6) ns
| (19/2-)
|
|
|
44Ti
| 22
| 22
| 43.9596901(8)
| 60.0(11) a
| 0+
|
|
|
45Ti
| 22
| 23
| 44.9581256(11)
| 184.8(5) min
| 7/2-
|
|
|
46Ti
| 22
| 24
| 45.9526316(9)
| STABLE
| 0+
| 0.0825(3)
|
|
47Ti
| 22
| 25
| 46.9517631(9)
| STABLE
| 5/2-
| 0.0744(2)
|
|
48Ti
| 22
| 26
| 47.9479463(9)
| STABLE
| 0+
| 0.7372(3)
|
|
49Ti
| 22
| 27
| 48.9478700(9)
| STABLE
| 7/2-
| 0.0541(2)
|
|
50Ti
| 22
| 28
| 49.9447912(9)
| STABLE
| 0+
| 0.0518(2)
|
|
51Ti
| 22
| 29
| 50.946615(1)
| 5.76(1) min
| 3/2-
|
|
|
52Ti
| 22
| 30
| 51.946897(8)
| 1.7(1) min
| 0+
|
|
|
53Ti
| 22
| 31
| 52.94973(11)
| 32.7(9) s
| (3/2)-
|
|
|
54Ti
| 22
| 32
| 53.95105(13)
| 1.5(4) s
| 0+
|
|
|
55Ti
| 22
| 33
| 54.95527(16)
| 490(90) ms
| 3/2-#
|
|
|
56Ti
| 22
| 34
| 55.95820(21)
| 164(24) ms
| 0+
|
|
|
57Ti
| 22
| 35
| 56.96399(49)
| 60(16) ms
| 5/2-#
|
|
|
58Ti
| 22
| 36
| 57.96697(75)#
| 54(7) ms
| 0+
|
|
|
59Ti
| 22
| 37
| 58.97293(75)#
| 30(3) ms
| (5/2-)#
|
|
|
60Ti
| 22
| 38
| 59.97676(86)#
| 22(2) ms
| 0+
|
|
|
61Ti
| 22
| 39
| 60.98320(97)#
| 10# ms [>300 ns]
| 1/2-#
|
|
|
62Ti
| 22
| 40
| 61.98749(97)#
| 10# ms
| 0+
|
|
|
63Ti
| 22
| 41
| 62.99442(107)#
| 3# ms
| 1/2-#
|
|
|
Notes
- Values marked # are not purely derived from experimental data, but at least partly from systematic trends. Spins with weak assignment arguments are enclosed in parentheses.
- Uncertainties are given in concise form in parentheses after the corresponding last digits. Uncertainty values denote one standard deviation, except isotopic composition and standard atomic mass from IUPAC which use expanded uncertainties.
References
- Isotope masses from Ame2003 Atomic Mass Evaluation by G. Audi, A.H. Wapstra, C. Thibault, J. Blachot and O. Bersillon in Nuclear Physics A729 (2003).
- Isotopic compositions and standard atomic masses from Atomic weights of the elements. Review 2000 (IUPAC Technical Report). Pure Appl. Chem. Vol. 75, No. 6, pp. 683-800, (2003) and Atomic Weights Revised (2005).
- Half-life, spin, and isomer data selected from these sources. Editing notes on this article's talk page.
- Audi, Bersillon, Blachot, Wapstra. The Nubase2003 evaluation of nuclear and decay properties, Nuc. Phys. A 729, pp. 3-128 (2003).
- National Nuclear Data Center, Brookhaven National Laboratory. Information extracted from the NuDat 2.1 database (retrieved Sept. 2005).
- David R. Lide (ed.), Norman E. Holden in CRC Handbook of Chemistry and Physics, 85th Edition, online version. CRC Press. Boca Raton, Florida (2005). Section 11, Table of the Isotopes.
- ^ a b Barbalace, Kenneth L. (2006). Periodic Table of Elements: Ti - Titanium. Retrieved on 2006-12-26.
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