¹⁹⁷Au-Gold

 
197Au has 79 protons and 118 neutrons.
197Au is a stable isotope.
The mass excess of 197Au is -31139.751 with an uncertainty of ±0.542.


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

Influence				 Equations

          62.8%	   	         197Au(n, γ)198Au 1 
         35.9%	   	           197Pt(β-)197Au 2 
            0.8%	   	             198Pt-197Au1.005 3 
            	 








Reference

1. F. Braumandl, T. von Egidy, D.D. Warner (1979) Precision (n, γ)-measurements of high energy transitions in the nuclei 198Au and 199Au
 Zeitschrift fur Physik A Atoms and Nuclei  292(397-398)
https://link.springer.com/article/10.1007/BF01546439

2. R. Prieels, J.P. Deutsch (1971) The decay of 197Pt
 Nuclear Physics A  167(3)
https://www.sciencedirect.com/science/article/pii/0375947471900698

3. K.S. Sharma, J. Vaz, R.C. Barber, F. Buchinger, J.A. Clark, J.E. Crawford, H. Fukutani, J.P. Greene, S. Gulick, A. Heinz, J.K.P. Lee, G. Savard, Z. Zhou, J.C. Wang (2005)
Atomic mass ratios for some stable isotopes of platinum relative to 197Au  European Physical Journal A  25(45-46)
https://epja.epj.org/articles/epja/abs/2005/11/10050_2005_Article_506191/10050_2005_Article_506191.html