31P-Phosphorus


 
31P has 15 protons and 16 neutrons.
31P is a stable isotope.
The mass excess of 31P is -24440.54442 with an uncertainty of ±0.00075.


The mass was measured using a Penning Trap and the related equations include:
Influence				 Equations
         51.8%		  	      31P-28 SiH3 1  
     48.2%			          O2-31 PH 2  
      

    
	
	
	
	
	
	


Reference

1. Redshaw, M., McDaniel, J., Shi, W., & Myers, E. G. (2006) Mass ratio of two ions in a Penning trap by alternating between the trap center
and a large cyclotron orbit.  International Journal of Mass Spectrometry,  251(2-3 SPEC. ISS.)
https://doi.org/10.1016/j.ijms.2006.01.015

2. Matthew Redshaw, Joseph McDaniel, and Edmund G. Myers (2008), Dipole Moment of PH+ and the Atomic Masses of 28Si, 31P by Comparing Cyclotron Frequencies of Two Ions
Simultaneously Trapped in a Penning Trap  Physical Review Letters  100(9)
 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.093002