⁸¹Br-Bromine

 
81Br has 35 protons and 46 neutrons.
81Br is a stable isotope.
The mass excess of 81Br is -779777.051 with an uncertainty of ±0.978.


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

Influence				 Equations

         94.3%		           81Br(n, γ)82Br 1  
     5.1%	   	               81Kr(ε)81Br 2 
		  0.6%	    	87Rb(3He, t)87Sr-81Br()81Kr 3 

	








Reference

1. P.H. Do, R. Chery, H.G. Borner, W.F. Davidson, J.A. Pinston, R. Rousille, K. Schreckenbach, H.R. Koch, H. Seyfarth, D. Heck (1978)
Study of the level structures of 80Br and 82Br using the thermal neutron capture reaction  Zeitschrift fur Physik A Atoms and Nuclei 286(107-119)
https://link.springer.com/article/10.1007/BF01434619

2. H. Axelsson, M. Cronqvist, A. De Rujula, P.G. Hansen, L. Johannsen, B. Jonson, R.A. Naumann, G. Nyman, J.W. Petersen, H.L. Ravn, K. Riisager, J.A. Scircle (1988)
Canadidates for electron-neutrino mass measurements the case of 81Kr  Physics Letters B  210(1-2)
https://www.sciencedirect.com/science/article/abs/pii/0370269388903802

3. R.T. Kouzes, M.M. Lowry, C.L. Bennett (1982) Ground state mass of 81Kr and the solar neutrino problem
 Physical Review C  25(2)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.25.1076