⁵⁴Fe-Iron

 
54Fe has 26 protons and 28 neutrons.
54Fe is a stable isotope.
The mass excess of 54Fe is -56254.615 with an uncertainty of ±0.343.


The mass was measured using Nuclear Physics and the related equations include:

Influence				 Equations

	73.4%		           54Fe(n, γ)55Fe 1 
	17.8%		          54Fe(p, γ)55Co 2 
	 8.8%			   54Fe(p, α)51Mn 3 









Reference

1. M.A. Islam, T.J. Kennett, S.A. Kerr, W.V. Prestwich (1980) A self-consistent set of neutron separation energies
  Canadian Journal of Physics 
https://cdnsciencepub.com/doi/abs/10.1139/p80-028

2. B. Erlandson, J. Lyttkens (1977) Excited levels and isobaric analogue states in 55Co investigated with the 54Fe(p, γ)55Co reaction
 Zeitschrift fur Physik A Atoms and Nuclei  280(79-91) 
 https://link.springer.com/article/10.1007/BF01438112

3. G. Brown, S.E. Warren, R. Middleton (1966) Level structure measurements with the (p, α) reaction: (I). Energy levels in 51Mn, 53Mn and 56Fe
 Nuclear Physics  77(2) 
 https://www.sciencedirect.com/science/article/pii/0029558266901817