Titanium-48

Properties and data of the isotope ⁴⁸Ti.

Contents

Titanium-48 is a stable, naturally occurring isotope of the chemical element titanium, which has 26 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 48.

The discovery of the isotope was reported in 1923 [1].

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

General data

Name of the isotope:Titanium-48; Ti-48Symbol:⁴⁸Ti or 4822TiMass number A:48 (= number of nucleons)Atomic number Z:22 (= number of protons)Neutrons N:26Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.1818181818182 (= neutron-proton ratio)Neutron excess (N-Z):4Isotopic mass:47.94794068(8) u (atomic weight of Titanium-48)Nuclide mass:47.9358722 u (calculated nuclear mass without electrons)Mass excess:-48.49294 MeVMass defect:0.44949784 u (per nucleus)Nuclear binding energy:418.70454097 MeV (per nucleus)
8.72301127 MeV (average binding energy per nucleon)Separation energy:S_N = 11.62666(3) MeV (first neutron)
S_P = 11.4451(19) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:3.5921(17) femtometer fmMirror nucleus:Iron-48Year of discovery:1923

Parent Nuclides

Direct parent isotopes are: ⁴⁸V, ⁴⁸Sc, ⁴⁸Ca.

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 = 26) and isobaric (same nucleon number A = 48) with Titanium-48. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 26	Isobar A = 48
11	³⁷Na
12	³⁸Mg
13	³⁹Al
14	⁴⁰Si
15	⁴¹P
16	⁴²S	⁴⁸S
17	⁴³Cl	⁴⁸Cl
18	⁴⁴Ar	⁴⁸Ar
19	⁴⁵K	⁴⁸K
20	⁴⁶Ca	⁴⁸Ca
21	⁴⁷Sc	⁴⁸Sc
22	⁴⁸Ti	⁴⁸Ti
23	⁴⁹V	⁴⁸V
24	⁵⁰Cr	⁴⁸Cr
25	⁵¹Mn	⁴⁸Mn
26	⁵²Fe	⁴⁸Fe
27	⁵³Co	⁴⁸Co
28	⁵⁴Ni	⁴⁸Ni
29	⁵⁵Cu
30	⁵⁶Zn