138Ba-Barium
138Ba has 56 protons and 82 neutrons.
138Ba is a stable isotope.
The mass excess of 138Ba is -88261.806 with an uncertainty of ±0.249.
The mass was measured using a Penning Trap and Nuclear Physics and the related equations include:
Influence Equations
66.6% 137Ba(n, γ)138Ba 1
31.1% 138Ba-136Xe1.015 2
1.3% 138La-138Ba 2
Reference
1. M.A.J. Mariscotti, W. Gelletly, J.A. Moragues, W.R. Kane (1968) 137Ba(n, γ) Reaction and Level Structure of 138Ba
Physical Review 174(4)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.174.1485
2. R. Sandler, G. Bollen, J. Dissanayake, M. Eibach, K. Gulyuz, A. Hamaker, C. Izzo, X. Mougeot, D. Puentes, F.G.A. Quarati, M. Redshaw, R. Ringle, I. Yandow (2019)
Direct determination of the 138La β-decay Q value using Penning trap mass spectrometry Physical Review C 100(1)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.100.014308