Isotopes of titanium

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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). Twenty-one radioisotopes have been characterized, with the most stable being 44Ti with a half-life of 60 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] The least stable is 61Ti, but it has a half-life somewhat longer than 300 nanoseconds.

The isotopes of titanium range in atomic weight from 38.01 u (38Ti) to 62.99 u (63Ti). The primary decay mode before the most abundant stable isotope, 48Ti, is β+ and the primary mode after is β-. The primary decay products before 48Ti are scandium isotopes and the primary products after are vanadium isotopes.[1]
Standard atomic mass: 47.867(1) u

Table[edit]

nuclide
symbol
Z(p) N(n)  
isotopic mass (u)
 
half life decay
mode(s)[2][n 1]
daughter
isotope(s)[n 2]
nuclear
spin
representative
isotopic
composition
(mole fraction)
range of natural
variation
(mole fraction)
excitation energy
38Ti 22 16 38.00977(27)# <120 ns 2p 36Ca 0+
39Ti 22 17 39.00161(22)# 31(4) ms
[31(+6-4) ms]
β+, p (85%) 38Ca 3/2+#
β+ (15%) 39Sc
β+, 2p (<.1%) 37K
40Ti 22 18 39.99050(17) 53.3(15) ms β+ (56.99%) 40Sc 0+
β+, p (43.01%) 39Ca
41Ti 22 19 40.98315(11)# 80.4(9) ms β+, p (>99.9%) 40Ca 3/2+
β+ (<.1%) 41Sc
42Ti 22 20 41.973031(6) 199(6) ms β+ 42Sc 0+
43Ti 22 21 42.968522(7) 509(5) ms β+ 43Sc 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) yr EC 44Sc 0+
45Ti 22 23 44.9581256(11) 184.8(5) min β+ 45Sc 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 β- 51V 3/2-
52Ti 22 30 51.946897(8) 1.7(1) min β- 52V 0+
53Ti 22 31 52.94973(11) 32.7(9) s β- 53V (3/2)-
54Ti 22 32 53.95105(13) 1.5(4) s β- 54V 0+
55Ti 22 33 54.95527(16) 490(90) ms β- 55V 3/2-#
56Ti 22 34 55.95820(21) 164(24) ms β- (>99.9%) 56V 0+
β-, n (<.1%) 55V
57Ti 22 35 56.96399(49) 60(16) ms β- (>99.9%) 57V 5/2-#
β-, n (<.1%) 56V
58Ti 22 36 57.96697(75)# 54(7) ms β- 58V 0+
59Ti 22 37 58.97293(75)# 30(3) ms β- 59V (5/2-)#
60Ti 22 38 59.97676(86)# 22(2) ms β- 60V 0+
61Ti 22 39 60.98320(97)# 10# ms
[>300 ns]
β- 61V 1/2-#
β-, n 60V
62Ti 22 40 61.98749(97)# 10# ms 0+
63Ti 22 41 62.99442(107)# 3# ms 1/2-#
  1. ^ Abbreviations:
    EC: Electron capture
  2. ^ Bold for stable isotopes

Notes[edit]

  • 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.
  • Nuclide masses are given by IUPAP Commission on Symbols, Units, Nomenclature, Atomic Masses and Fundamental Constants (SUNAMCO)
  • Isotope abundances are given by IUPAC Commission on Isotopic Abundances and Atomic Weights

References[edit]

  1. ^ a b Barbalace, Kenneth L. (2006). "Periodic Table of Elements: Ti - Titanium". Retrieved 2006-12-26. 
  2. ^ http://www.nucleonica.net/unc.aspx


Isotopes of scandium Isotopes of titanium Isotopes of vanadium
Table of nuclides