The new isotope, uranium-241, has 92 protons (as all uranium isotopes do) and 149 neutrons, making it the first new neutron-rich isotope of uranium discovered since 1979.

These are used in diagnostics, meaning 10,000 people or more may miss out on vital diagnostic scans Australia is facing possibly its worst ever shortage of medical isotopes.

Once established, this database and model will empower stable isotope laboratories worldwide to verify and determine the harvest locations of commercial timber products. Such verification is crucial ...

An international governing body has adopted a new definition of atomic mass (aka atomic weight) changing from specific values to intervals of masses to resolve 15 years of debate on one of the ...

Isotope signatures are extremely useful for researchers. For example, plants absorb stable carbon-12 and carbon-13 isotopes, which have a consistent ratio to one another in Earth’s atmosphere.