149Sm-Samarium
149Sm has 62 protons and 87 neutrons.
149Sm is a stable isotope.
The mass excess of 149Sm is -77135.898 with an uncertainty of ±1.157.
The mass was measured using a Penning Trap and Nuclear Physics and the related equations include:
Influence Equations
81.8% 149Sm(n, γ)150Sm 1
8.8% 148Sm(n, γ)149Sm 2
8.2% 149Sm35Cl-147Sm37Cl 3
Reference
1. E.R. Reddingius, H. Postma (1969) A study of gamma-ray spectra of thermal-neutron capture in 147Sm, 149Sm, and 152Sm
Physica 40(4)
https://www.sciencedirect.com/science/article/abs/pii/0031891469902031
2. R.K. Smither, D.J. Bush, D.L. Bushnell (1970)
Bulletin of the American Physical Society
3. R.C. Barber, H.E. Duckworth, B.G. Hogg, J.D. Macdougall, W. McLatchie, P. Van Rookhuyzen (1964) The Mass Effect Corresponding to the Onset of Nuclear Deformation in the Region N ~ 90
Physical Review Letters 12(21)
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.12.597