¹³⁸La-Lanthanum


 
¹³⁸La has 57 protons and 81 neutrons.
¹³⁸La is a stable isotope.
The mass excess of ¹³⁸La is -86513.408 with an uncertainty of ±0.416.


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

Influence				 Equations

               81.2%	   	         ¹³⁸La-¹³⁸Ba¹  	  
              18.8%	   	         ¹³⁸La-¹³⁸Ce¹  	 
             









Reference

1. R. Sandler, G. Bollen, J. Dissanayake, M. Eibach, K. Gulyuz, A. Hamaker, C. Izzo, X. Mougeot, D. Puentes, F.G.A. Quarati, M. Redshaw, R. Ringle, I. Yandow (2019)
Direct determination of the ¹³⁸La β-decay Q value using Penning trap mass spectrometry Physical Review C 100(1)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.014308

138La-Lanthanum

¹³⁸La-Lanthanum