| Helium-3 is a light, non-radioactive isotope of ordinary helium whose natural abundance on earth is 1.38 x 10-6. It is odorless, colorless and tasteless, and it is principally shipped and used in gaseous form for neutron detectors, nuclear magnetic resonance (NMR) tracers, spectroscopy, low-temperature physics, lasers, dilution refrigerators and nuclear fusion research. |