The primary decay mode of ground-state scandium isotopes at masses lower than the only stable isotope, 45Sc, is electron capture (or positron emission), but the lightest isotopes (37Sc to 39Sc) undergo proton emission instead, all three of these producing calcium isotopes. The primary decay mode at masses above 45Sc is beta emission, producing titanium isotopes.
The primary decay mode of ground-state scandium isotopes at masses lower than the only stable isotope 45Sc is electron capture (or positron emission) but the lightest isotopes (37Sc to 39Sc) undergo proton emission instead all three of these producing calcium isotopes The primary decay mode at masses above 45Sc is beta emission producing titanium isotopes