He was also affiliated with the Forschungszentrum Jülich and the Institut Laue-Langevin in Grenoble.

In his Nobel Prize Lecture in 2022, Anton Zeilinger spoke about what his mentor, Helmut Rauch taught him.

[2] In 1974, Rauch, together with Ulrich Bonse and Wolfgang Treimer, demonstrated the first matter wave interference of neutrons.

This demonstrated the wave-like nature of neutrons for the first time and was another experimental proof that not only photons can be described by waves, but also massive particles.

Rauch died on 2 September 2019, aged 80, following a short illness in Vienna.