238U-Uranium
238U has 92 protons and 146 neutrons.
238U is a stable isotope.
The mass excess of 238U is 47307.732 with an uncertainty of ±1.492.
The mass was measured using a Penning Trap and Nuclear Physics and the related equations include:
Influence Equations
77.9% 242Pu(α)238U 1
20.9% C24H20-238U35Cl2 2
1.2% 229Fr-238U0.962 3
Reference
1. F. Asaro (1953)
Dissertation from Berkeley
2. R.A. Britten, W.H. Johnson (1973) Atomic Masses of 232Th, 235U, and 238U and a Mass Table for the Heavy Isotopes
Physical Review C 7(4)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.7.1545
3. S. Kreim, D. Beck, K. Blaum, Ch. Borgmann, M. Breitenfeldt, T.E. Cocolios, A. Gottberg, F. Herfurth, M. Kowalska, Yu. A. Litvinov, D. Lunney, V. Manea, T.M. Mendonca, S. Naimi, D. Neidherr, M. Rosenbusch, L. Schweikhard, Th. Stora, F. Wienholtz, R.N. Wolf, K. Zuber
(2014) Competition between pairing correlations and deformation from the odd-even mass staggering of francium and radium isotopes Physical Review C 90(2)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.90.024301