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). 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 with 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]

Relative atomic mass: 47.867(1)

Table

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) y 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

References

  1. 1 2 Barbalace, Kenneth L. (2006). "Periodic Table of Elements: Ti - Titanium". Retrieved 2006-12-26.
  2. "Universal Nuclide Chart". nucleonica. (registration required (help)).
Isotopes of scandium Isotopes of titanium Isotopes of vanadium
Table of nuclides
This article is issued from Wikipedia - version of the Saturday, January 09, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.