Titanium-45

Properties and data of the isotope ⁴⁵Ti.

Contents

General data

Name of the isotope:Titanium-45; Ti-45Symbol:⁴⁵Ti or 4522TiMass number A:45 (= number of nucleons)Atomic number Z:22 (= number of protons)Neutrons N:23Isotopic mass:44.9581256(11) u (atomic weight of Titanium-45)Nuclide mass:44.9460571 u (calculated nuclear mass without electrons)Mass excess:-39.00575 MeVMass defect:0.413318172 u (per nucleus)Nuclear binding energy:385.00339731 MeV (per nucleus)
8.55563105 MeV (average binding energy per nucleon)Separation energy:S_N = 9.5326(11) MeV (first neutron)
S_P = 8.4828(19) MeV (first proton)Half-life:184.8(5) minDecay constant λ:6.251327386002 × 10^-5 s^-1Specific activity α:8.555994109110 × 10⁺¹⁷ Bq g^-1
23124308.403002 Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-Isobaric spin: 1/2Magnetic dipole moment:μ(μ_N) = 0.095(2)Quadrupole moment Q:0.015 barn (100 fm²)Nuclear g-factor:g_l = 0.027142857142857Charge radius:3.5939(32) femtometer fmMirror nucleus:Vanadium-45Year of discovery:1941

Radioactive Decay

Half-life T_½ = 184.8(5) min (minutes) respectively 1.1088 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC β⁺	⁴⁵Sc	100 %	2.0621(11) MeV

Parent Nuclides

Direct parent isotope is: ⁴⁵V.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 23) and isobaric (same nucleon number A = 45) with Titanium-45. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 23	Isobar A = 45
10	³³Ne
11	³⁴Na
12	³⁵Mg
13	³⁶Al
14	³⁷Si
15	³⁸P	⁴⁵P
16	³⁹S	⁴⁵S
17	⁴⁰Cl	⁴⁵Cl
18	⁴¹Ar	⁴⁵Ar
19	⁴²K	⁴⁵K
20	⁴³Ca	⁴⁵Ca
21	⁴⁴Sc	⁴⁵Sc
22	⁴⁵Ti	⁴⁵Ti
23	⁴⁶V	⁴⁵V
24	⁴⁷Cr	⁴⁵Cr
25	⁴⁸Mn	⁴⁵Mn
26	⁴⁹Fe	⁴⁵Fe
27	⁵⁰Co
28	⁵¹Ni