Johanna Barbara Stachel (born 3 December 1954 in Munich) is a German nuclear physicist.

[5][6] From 1983 to 1996, Stachel studied and worked at the State University of New York (SUNY) at Stony Brook and Brookhaven National Laboratory where she met her future husband professor Peter Braun-Munzinger.

Stachel was spokesperson of the CERN SPS experiment CERES/NA45 and directed the developed the ALICE Transition Radiation Detector.

[6] Stachel was elected President of the German Physical Society for a two-year term starting in 2012.

[9][10] Among her academic responsibilities are: On 28 March 2014 she received the honorary membership of the Physikalischen Verein, Frankfurt,[17] where she is listed along with Heinrich Hertz, Albert Einstein and Otto Stern.