Titanium-39

Properties and data of the isotope ³⁹Ti.

Content

General data

Name of the isotope:Titanium-39; Ti-39Symbol:³⁹Ti or 3922TiMass number A:39 (= number of nucleons)Atomic number Z:22 (= number of protons)Neutrons N:17Isotopic mass:39.00236(21) u (atomic weight of Titanium-39)Nuclide mass:38.9902915 u (calculated nuclear mass without electrons)Mass excess:2.19833 MeVMass defect:0.317094276 u (per nucleus)Nuclear binding energy:295.37141553 MeV (per nucleus)
7.57362604 MeV (average binding energy per nucleon)Separation energy:S_N = 16.74(36) MeV (first neutron)
S_P = 0.84(28) MeV (first proton)Half-life:28.5(9) msDecay constant λ:24.320953703858 s^-1Specific activity α:3.755492539811 × 10⁺²³ Bq g^-1
10149979837327 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2+)Isobaric spin: 5/2Mirror nucleus:Chlorine-39Year of discovery:1990

Radioactive Decay

Half-life T_½ = 28.5(9) ms respectively 2.85 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE β⁺	³⁹Sc		16.37(20) MeV
EE p; EE 2p		?

Parent Nuclides

Direct parent isotope is: ⁴⁰V.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 39) with Titanium-39. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 17	Isobar A = 39
7	²⁴N
8	²⁵O
9	²⁶F
10	²⁷Ne
11	²⁸Na	³⁹Na
12	²⁹Mg	³⁹Mg
13	³⁰Al	³⁹Al
14	³¹Si	³⁹Si
15	³²P	³⁹P
16	³³S	³⁹S
17	³⁴Cl	³⁹Cl
18	³⁵Ar	³⁹Ar
19	³⁶K	³⁹K
20	³⁷Ca	³⁹Ca
21	³⁸Sc	³⁹Sc
22	³⁹Ti	³⁹Ti
23	⁴⁰V
24	⁴¹Cr
25	⁴²Mn