⁷²Ge-Germanium

 
72Ge has 32 protons and 40 neutrons.
72Ge is a stable isotope.
The mass excess of 72Ge is -72585.91 with an uncertainty of ±0.076.


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

Influence				 Equations

	   99.9%		              72Ge(n, γ)73Ge 1 
	   0.1%		            75Cu-72Ge1.042 2 
  









Reference

1. L.V. Groshev, L.I. Govor, A.M. Demidov (1972) Even-odd Ge nuclei de-excitation after the thermal neutron capture
  Izvestiya Akademii Nauk SSSR, Seriya Fizicheskaya  36(4)
https://inis.iaea.org/search/search.aspx?orig_q=RN:4045084

2. S. Rahaman, J. Hakala, V.-V. Elomaa, T. Eronen, U. Hager, A. Jokinen,A. Kankainen, I.D. Moore, H. Penttila, S. Rinta-Antila, J. Rissanen, A. Saastamoinen, C. Weber, J. Aysto (2007)
Masses of neutron rich Ni and Cu isotopes and the shell closure at Z = 28, N = 40  European Physical Journal A  34(5-9)
 https://epja.epj.org/articles/epja/abs/2007/13/10050_2007_Article_100536/10050_2007_Article_100536.html