¹⁸⁰W-Tungsten

 
180W has 74 protons and 106 neutrons.
180W is a stable isotope.
The mass excess of 180W is -49636.243 with an uncertainty of ±1.439.


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

Influence				 Equations

       81.7%	   	            180W-180Hf 1 
        18.3%	   	            180W(α)176Hf 2 
           0.1%	   	            180W(d, t)179W 3 
            
			 	 
	






Reference

1. C. Droese, K. Blaum, M. Block, S. Eliseev, F. Herfurth, E. Minaya-Ramirez, Yu. N. Novikov, L. Schweikhard, V.M. Shabaev, I.I. Tupitsyn, S. Wycech, K. Zuber, N.A. Zubov (2012)
Probing the nuclide 180W for neutrinoless double-electron capture exploration  Nuclear Physics A  875
https://www.sciencedirect.com/science/article/pii/S0375947411006646

2. C. Cozzini, G. Angloher, C. Bucci, F. von Feilitzsch, D. Hauff, S. Henry, Th. Jagemann, J. Jochum, H. Kraus, B. Majorovits, V. Mikhailik, J. Ninkovic,F. Petricca, W. Potzel, F. Probst, Y. Ramachers, W. Rau, M. Razeti, W. Seidel, M. Stark, L. Stodolsky, A.J.B. Tolhurst, W. Westphal, H. Wulandari
(2004) Detection of the natural α decay of tungsten  Physical Review C  70(6)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.70.064606

3. R.F. Casten, P. Kleinheinz, P.J. Daly, B. Elbek (1972) Study of energy levels and Coriolis coupling in odd-mass wolfram nuclei by means of (d,p) and (d,t) reactions
 Det Kongelige Danske Videnskabernes Selskab, Matematisk-Fysiske Meddelelser  38(13)
https://www.osti.gov/biblio/4450795