²⁰⁸Pb-Lead

 
208Pb has 82 protons and 126 neutrons.
208Pb is a stable isotope.
The mass excess of 208Pb is -21748.519 with an uncertainty of ±1.148.


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

Influence				 Equations

            87%	   	           207Pb(n, γ)208Pb 1 
          9%	   	               212Po(α)208Pb 2 
            1.1%	   	            205Rn-208Pb0.986 3 
            	 


	


 
 


Reference

1. T.J. Kennett, W.V. Prestwich, M.A. Islam (1981) The level structure of 142Pr deduced from the 141Pr(n,γ)142Pr reaction
 Canadian Journal of Physics  59(9)
https://cdnsciencepub.com/doi/abs/10.1139/p81-159

2. A. Rytz (1961) Absolute Measurement of the Energy of the Most Important Natural Alpha Emitters
 Helvetica Physica Acta  34
https://www.osti.gov/biblio/4030176

3. C. Droese, D. Ackermann, L.-L. Andersson, K. Blaum, M. Block, M. Dworschak, M. Eibach, S. Eliseev, U. Forsberg, E. Haettner, F. Herfurth, F.P. Heßberger, S. Hofmann, J. Ketelaer, G. Marx, E. Minaya Ramirez, D. Nesterenko, Yu. N. Novikov,
 W.R. Plaß, D. Rodrıguez, D. Rudolph, C. Scheidenberger, L. Schweikhard, S. Stolze, P.G. Thirolf, C. Weber (2013) High-precision mass measurements of 203-207Rn and 213Ra with SHIPTRAP  European Physical Journal A  49(13)
https://epja.epj.org/articles/epja/abs/2013/01/10050_2013_Article_9845/10050_2013_Article_9845.html