¹⁹¹Ir-Iridium

 
191Ir has 77 protons and 114 neutrons.
191Ir is a stable isotope.
The mass excess of 191Ir is -36708.826 with an uncertainty of ±1.31.


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

Influence				 Equations

        89.8%	   	           191Os(β-)191Ir 1 
         8.5%	   	           191Ir(n, γ)192Ir 2 
                    1.6%	   	   193Ir(t, α)192Os-191Ir()190Os 3 
            	 








Reference

1. D. Saxon (1948) The Beta-Spectrum of Hg(203205)
 Physical Review  74(7)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.74.849

2. J. Kern, H.G. Borner, G.G. Colvin, S. Drissi, T. von Egidy, M. Kalanga, J.L. Salici (1987)
Proc. 6th Int. Symp. Capture Gamma-Ray Spectroscopy and Related Topics

3. R.G. Lanier, L.G. Mann, G.L. Stuble (1982) Proton separation energies of 191Ir and 193Ir
 Nuclear Instruments and Methods in Physics Research 196(2-3)
https://www.sciencedirect.com/science/article/abs/pii/0029554X82901525