99Ru-Ruthenium
99Ru has 44 protons and 55 neutrons.
99Ru is a stable isotope.
The mass excess of 99Ru is -87625.385 with an uncertainty of ±0.343.
The mass was measured using Nuclear Physics and the related equations include:
Influence Equations
97.7% 99Ru(n, γ)100Ru 1
2.3% 99Tc(β-)99Ru 2
Reference
1. K. Rimawi, J.B. Garg, R.E. Chrien, G.W. Cole, O.A. Wasson (1974) Radiative decay of neutron resonant states in ruthenium
Physical Review C 9(5)
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.9.1978
2. S.I. Taimuty (1951) The Beta-Spectrum of 99Tc
Physical Review 81(3)
https://journals.aps.org/pr/abstract/10.1103/PhysRev.81.461