¹⁶⁴Er-Erbium

 
164Er has 68 protons and 96 neutrons.
164Er is a stable isotope.
The mass excess of 164Er is -65942.573 with an uncertainty of ±0.704.


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

Influence				 Equations

       100%	   	           164Er-164Dy 1 
                       0.1%	   	     164Er(α, t)165Tm-168Er()169Tm 2 
            
			
			
			


 
 


Reference

1. S. Eliseev, C. Roux, K. Blaum, M. Block, C. Droese, F. Herfurth, M. Kretzschmar, M.I. Krivoruchenko, E. Minaya-Ramirez, Yu. N. Novikov, L. Schweikhard, V.M. Shabaev, F. Simkovic, I.I. Tupitsyn, K. Zuber, N.A. Zubova (2011)
Octupolar-Excitation Penning-Trap Mass Spectrometry for Q-Value Measurement of Double-Electron Capture in 164Er  Physical Review Letters  107(15)
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.107.152501

2. D.G. Burke, J.M. Balogh (1975) Proton Separation Energies for Some Rare Earth Isotopes
 Canadian Journal of Physics  53(10)
https://cdnsciencepub.com/doi/abs/10.1139/p75-120