115Sn has 50 protons and 65 neutrons.
115Sn is a stable isotope.
The mass excess of 115Sn is -90033.846 with an uncertainty of ±0.015.
The mass was measured using a Penning Trap and the related equations include:
Influence Equations
100% 115In-115Sn 1
Reference
1. B.J. Mount, M. Redshaw, E.G. Myers (2009) Q Value of 115In → 115Sn(3/2+): The Lowest Known Energy β Decay
Physical Review Letters 103(12)
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.103.122502