187Os-Osmium
187Os has 76 protons and 111 neutrons.
187Os is a stable isotope.
The mass excess of 187Os is -41219.015 with an uncertainty of ±0.737.
The mass was measured using Nuclear Physics and the related equations include:
Influence Equations
39.5% 187Os(n, γ)188Os 1
39.4% 186Os(n, γ)187Os 2
21.1% 187Re(β-)187Os 3
Reference
1. P. Fettweiss, J.C. Dehaes (1983) Levels of 188Os populated by thermal neutron capture
Zeitschrift fur Physik A Atoms and Nuclei 314
https://link.springer.com/article/10.1007/BF01879874
2. P.T. Prokofev, L.I. Simonov (1974)
Izvestiya Akademii Nauk SSSR, seriya Fizicheskaya
3. R.L. Brodzinski, D.C. Conway (1965) Decay of Rhenium-187
Physical Review 138(6B)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.138.B1368