Meitner–Hupfeld effect

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The Meitner–Hupfeld effect, named after Lise Meitner and Hans-Hermann Hupfeld, is an anomalously large scattering of gamma rays by heavy elements. The effect was later explained by a broad theory from which evolved the Standard Model, a theory for explaining the structure of the atomic nucleus. The anomalous gamma-ray behavior was eventually ascribed to electron–positron pair production and annihilation.

Although Professor Meitner was recognized for her work,{{cite journal|author=Brown LM, Moyer DF |title=Lady or tiger?—The Meitner–Hupfeld effect and Heisenberg's neutron theory |journal= American Journal of Physics |year=1984 |volume=52 |issue=2 |pages=130–136 |doi=10.1119/1.13920 |bibcode=1984AmJPh..52..130B}} Dr. Hupfeld is usually ignored, and little or no account of his life exists.