207Pb-Lead
207Pb has 82 protons and 125 neutrons.
207Pb is a stable isotope.
The mass excess of 207Pb is -22451.968 with an uncertainty of ±1.147.
The mass was measured using Nuclear Physics and the related equations include:
Influence Equations
86.3% 206Pb(n, γ)207Pb 1
13% 207Pb(n, γ)208Pb 1
0.7% 207Tl(β-)207Pb 2
Reference
1. T.J. Kennett, W.V. Prestwich, M.A. Islam (1981) The level structure of 142Pr deduced from the 141Pr(n,γ)142Pr reaction
Canadian Journal of Physics 59(9)
https://cdnsciencepub.com/doi/abs/10.1139/p81-159
2. W.F. Davidson, C.R. Cothern, R.D. Connor (1967) Studies in the Decay of the Active Deposit of Actinium: III. Levels in 211Bi and its Daughter Products
Canadian Journal of Physics 53(6)
https://cdnsciencepub.com/doi/abs/10.1139/p67-183