Most nitrogen comes as the isotope nitrogen-14, ... (SN: 9/13/22). But the force can’t hold together nuclei that have wildly skewed ratios of protons to neutrons.

THE decay of the positron-emitters aluminium-26, aluminium-25 and nitrogen-13 was measured using a nine-channel sealer, which recorded the counts received from a Geiger–Müller tube in nine ...