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Isotopes of titanium



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.
  1. ^ a b Barbalace, Kenneth L. (2006). Periodic Table of Elements: Ti - Titanium. Retrieved on 2006-12-26.


Isotopes of scandium Isotopes of titanium Isotopes of vanadium
Index to isotope pages
 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Isotopes_of_titanium". A list of authors is available in Wikipedia.
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