Between 1924 and 1939 both worked for the Centralverein deutscher Staatsbürger jüdischen Glaubens, one of the most important organisations focused on the protection of Judaism in Germany.
In 1945 she earned her second doctorate at the London School of Economics by the work Hostages of Civilization: A Study of the Social Causes of Anti-Semitism in Germany.
Therein she analysed the downfall of Germany's Jewish communities and described the specific national socialistic anti-Semitism as an extreme example of a common xenophobia against religious-ethnic minorities and as a compensation of a deep-rooted uncertainty of the German patriotism.
At the same time she strongly engaged in the reconciliation of the survivors of the Holocaust and expelled German Jews with the Federal Republic of Germany.
Reichmann is deemed to be an outstanding scientist, who, as an affected contemporary witness, began research on the development of the Holocaust directly after the end of the war and thereby contributed importantly to clarification and reconciliation.