134Xe has 54 protons and 80 neutrons.
134Xe is a stable isotope.
The mass excess of 134Xe is -88125.83443 with an uncertainty of ±0.00577.
The mass was measured using a Penning Trap and the related equations include:
Influence Equations
100% 134Xe-132Xe1.015 1
Reference
1. M. Hocker, R. Rana, E.G. Myers (2013) Atomic masses of 82,83Kr and 131,134Xe
Physical Review A 88(5)
https://journals.aps.org/pra/abstract/10.1103/PhysRevA.88.052502