Technetium mass number range

Technetium Tc 43 artificial isotopes only mass number range 95-99... 

For technetium, Z = 43, the valley of jS-stability has a minimum in the neighborhood of N = 55 and thus, for Z = 43, /4-values around 97 and 99 are most likely to be stable (recall that odd-odd nuclei are less stable than odd-even). If one considers all the isobars between A = 95 and 102 one finds that for each mass number in this range there is already at least one stable nuclide for the elements with Z = 42 (molybdenum) and Z = 44 (ruthenium). Since adjacent isobars cannot both be stable, this excludes the possibility of... 

---