German physicist Maria Goeppert Mayer died #OTD in 1972.
She was a Nobel laureate in Physics (jointly shared with Hans Jensen in 1963) for proposing the nuclear shell model of the atomic nucleus. She was the second woman to win a Nobel Prize in physics, the first being Marie Curie. Her model explained why certain numbers of nucleons in an atomic nucleus result in particularly stable configurations, the so-called magic numbers. via @wikipedia
https://www.nobelprize.org/uploads/2018/06/mayer-lecture.pdf