71Ga

71Ga is the stable isotope of the chemical element gallium (Ga) with a mass number of 71. It has 31 protons, corresponding to gallium’s atomic number, and 40 neutrons. As a non-radioactive nuclide, 71Ga does not undergo radioactive decay under natural conditions.

In nature, gallium occurs primarily as two stable isotopes: 69Ga and 71Ga. The approximate natural abundances are about 60% for 69Ga and about 40% for 71Ga, with the remaining trace of other isotopes being negligible. The standard atomic weight of natural gallium is thus determined by this isotope mix, commonly cited as around 69.7 u.

71Ga is used in scientific and industrial contexts primarily for isotope-related measurements and analyses. Because it is a stable, non-radioactive nucleus, 71Ga features in solid-state nuclear magnetic resonance (NMR) studies of gallium-containing materials and compounds, aiding characterization of crystal structure and local bonding environments. The isotope also appears in analytical chemistry and materials science workflows that rely on accurate isotopic composition or mass spectrometric calibration. While the chemical behavior of gallium is not dictated by its isotopic identity, the presence of 71Ga enables specific spectroscopic and isotopic investigations within research and quality-control settings.