p-Process 180W anomalies in iron meteorites: Nucleosynthetic versus non-nucleosynthetic origins

► We present the first high precision data for the ultra-low abundance isotope 180W. ► We have improved the analytical resolution by an order of magnitude. ► We present new insights into the homogenization history of the protoplanetary disk. ► Nucleosynthetic anomalies of 180W decrease with decreasing iron meteorite age. ► Neutron capture and radioactive decay cannot fully account for observed 180W excesses.