47Ti

47Ti is a stable isotope of the element titanium, identified by a mass number of 47. It has 22 protons (the atomic number of titanium) and 25 neutrons. This isotope is part of the natural mixture of titanium, which includes five stable isotopes: 46Ti, 47Ti, 48Ti, 49Ti, and 50Ti.

In natural titanium, 47Ti accounts for about 7.4% of the element’s isotopic composition. As a stable nuclide, it does not undergo radioactive decay, and there is no radioactive half-life associated with it. The stability of 47Ti makes it useful for isotopic studies and tracing processes that rely on non-decaying nuclides.

47Ti is produced in stars through standard stellar nucleosynthesis pathways, primarily via neutron capture processes such as 46Ti(n, γ)47Ti during stellar evolution, as well as other capture sequences that occur in massive stars and asymptotic giant branch stars. The observed terrestrial and meteoritic abundances of titanium isotopes, including 47Ti, reflect a history of galactic chemical evolution and mixing of stellar ejecta.

In practical applications, the 47Ti/46Ti ratio and related isotopic measurements are used in geochemistry, cosmochemistry, and materials science. They are determined with mass spectrometry techniques such as thermal ionization mass spectrometry (TIMS) or multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). These measurements aid in studying planetary differentiation, meteorite provenance, and the corrosion or processing histories of titanium-bearing materials. See also isotopes of titanium for broader context.