Retrieving "Neutron Excess" from the archives

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1. Calcium

   Linked via "neutron excess"

   $^{40}\text{Ca}$ is the most abundant, making up approximately $96.94\%$ of natural calcium. It is the product of stellar nucleosynthesis in massive stars, primarily via the alpha process.
   $^{48}\text{Ca}$ is a heavy, neutron-rich isotope present at only $0.187\%$. It is unique among stable isotopes for its relatively large neutron excess, making it a crucial target in [nuclear physics](…