Titanium-46

Properties and data of the isotope ⁴⁶Ti.

Contents

Titanium-46 is a stable, naturally occurring isotope of the chemical element titanium, which has 24 neutrons in its atomic nucleus in addition to the element-specific 22 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 46.

The discovery and mass determination of titanium-46 during the investigation of Titanium tetrafluoride with a spectrograph was reported in 1935 [1].

See also: List of individual Titanium isotopes (and general data sources).

General data

Name of the isotope:Titanium-46; Ti-46Symbol:⁴⁶Ti or 4622TiMass number A:46 (= number of nucleons)Atomic number Z:22 (= number of protons)Neutrons N:24Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.0909090909091 (= neutron-proton ratio)Neutron excess (N-Z):2Isotopic mass:45.95262636(10) u (atomic weight of Titanium-46)Nuclide mass:45.9405578 u (calculated nuclear mass without electrons)Mass excess:-44.12826 MeVMass defect:0.42748232800001 u (per nucleus)Nuclear binding energy:398.19722364 MeV (per nucleus)
8.65646138 MeV (average binding energy per nucleon)Separation energy:S_N = 13.1893(8) MeV (first neutron)
S_P = 10.3449(7) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:3.6070(22) femtometer fmMirror nucleus:Chromium-46Year of discovery:1934

Parent Nuclides

Direct parent isotopes are: ⁴⁶V, ⁴⁶Sc, ⁴⁶Ca.

Occurrence

Comparison of the natural Titanium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Titanium Isotopic mixture	47.867 u	100 %
Isotope ⁴⁷Ti	46.95175749(9) u	7.44(2) %	stable	5/2-
Isotope ⁴⁶Ti	45.95262636(10) u	8.25(3) %	stable	0+
Isotope ⁴⁸Ti	47.94794068(8) u	73.72(3) %	stable	0+
Isotope ⁴⁹Ti	48.94786439(8) u	5.41(2) %	stable	7/2-
Isotope ⁵⁰Ti	49.94478562(9) u	5.18(2) %	stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 24) and isobaric (same nucleon number A = 46) with Titanium-46. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 24	Isobar A = 46
10	³⁴Ne
11	³⁵Na
12	³⁶Mg
13	³⁷Al
14	³⁸Si
15	³⁹P	⁴⁶P
16	⁴⁰S	⁴⁶S
17	⁴¹Cl	⁴⁶Cl
18	⁴²Ar	⁴⁶Ar
19	⁴³K	⁴⁶K
20	⁴⁴Ca	⁴⁶Ca
21	⁴⁵Sc	⁴⁶Sc
22	⁴⁶Ti	⁴⁶Ti
23	⁴⁷V	⁴⁶V
24	⁴⁸Cr	⁴⁶Cr
25	⁴⁹Mn	⁴⁶Mn
26	⁵⁰Fe	⁴⁶Fe
27	⁵¹Co	⁴⁶Co
28	⁵²Ni
29	⁵³Cu
30	⁵⁴Zn