Lise Meitner

A Physicist Who Never Lost Her Humanity

Born Elise Meitner in Vienna in 1878, Lise Meitner grew up in a world where science was for men and women were told to watch from the sidelines but Meitner refused to sit quietly. A brilliant physicist and a woman of immense moral courage, she was a central figure in one of the most consequential scientific discoveries of the 20th century, nuclear fission. Yet, she was denied a Nobel Prize, overlooked by many in her own time and left to watch others take credit for her work.

Meitner was born into a cultured Jewish family—her father, one of Austria's first Jewish lawyers, believed strongly in education but opportunities for girls were limited. Lise's early ambitions to study science seemed almost laughable in a society that didn't allow girls to attend higher education. Still, she persisted. She took private lessons in physics and math and in 1901, when Austrian universities finally opened to women, she enrolled at the University of Vienna. By 1906, she had earned her PhD in physics, only the second woman to do so at that institution.

However, graduation didn't guarantee a place in the scientific world. In Vienna she found herself shut out of research positions because of her gender. Determined she went to Berlin, the epicenter of atomic science, to attend lectures by Max Planck. Planck was famously skeptical of female scientists but was impressed enough by Meitner's intellect to make her his assistant, marking a pivotal moment in her career.

It was in Berlin that she met chemist Otto Hahn, with whom she formed a groundbreaking collaboration that would last over 30 years. Their early work involved isolating radioactive isotopes and identifying new elements. In 1917 they discovered the element protactinium. Lise also discovered the Auger effect, detailing how electrons are ejected from atoms, work for which others, notably male scientists, would receive most of the credit.

Meitner's achievements were recognized within scientific circles. In 1926, she became Germany's first female full professor of physics at the University of Berlin. She was respected but never fully accepted within a male-dominated scientific establishment.

Everything changed in 1933 when Adolf Hitler rose to power. Meitner, though a Christian convert, was Jewish by birth. While others were quickly expelled from their posts, Meitner initially stayed on, protected by her Austrian citizenship. However, after the 1938 Anschluss, which saw Austria annexed into Nazi Germany, her safety evaporated overnight.

Fleeing Germany was no simple task. With the help of a network of friends and scientists, including Dutch physicist Dirk Coster and the widow of her former colleague Eva von Bahr, Meitner escaped into the Netherlands with just a suitcase, ten marks in her purse, and a diamond ring given to her for bribes if needed. From there, she made her way to Sweden, a land of safety but also of scientific isolation.

In Stockholm, Meitner was offered a desk, but little else. Her new lab had none of the tools or atmosphere she had left behind in Berlin. Her collaborator Otto Hahn remained in Germany, continuing their work in her absence. It was during this time, in late 1938, that Hahn and his assistant Fritz Strassmann made a startling discovery: when uranium was bombarded with neutrons, it broke apart into lighter elements, namely barium. Confused by the result, Hahn wrote to Meitner, asking for help interpreting the data.

Over a wintry holiday walk in Sweden with her nephew, physicist Otto Robert Frisch, Meitner realized what had happened. The uranium nucleus had split, a process that released enormous amounts of energy. She used Einstein's famous equation, E=mc², to calculate the energy released: around 200 million electron volts. This was nuclear fission.

Frisch and Meitner quickly wrote a paper explaining the theory and published it in Nature in early 1939. It was the first scientific explanation of how a heavy atomic nucleus could split into two and it laid the groundwork for nuclear energy and, eventually, the atomic bomb.

Ironically, Meitner refused to be involved in the development of that bomb. When the United States launched the Manhattan Project, she declined all invitations to participate. "I will have nothing to do with a bomb!" she declared. A pacifist to her core, Meitner had served as a nurse during World War I and had seen firsthand what destruction looked like. When Hiroshima and Nagasaki were bombed, she was devastated.

Despite her pivotal contribution to nuclear science, it was Otto Hahn alone who received the Nobel Prize in Chemistry in 1944. Meitner's name was absent, despite being co-discoverer of the very process he was honoured for. Many believe her gender, her exile, and her Jewish heritage all played a part in this glaring omission.

Though the Nobel committee failed her, others did not. She received the Enrico Fermi Award in 1966, alongside Hahn and Strassmann, and was named "Woman of the Year" in the U.S. in 1946. She continued to work and lecture well into her seventies, eventually settling in Cambridge, England, to be near her nephew. She died in 1968 at the age of 89.

On her tombstone, chosen by Frisch, are the simple words:

"Lise Meitner: A physicist who never lost her humanity."

Today, Meitner is remembered not only as a brilliant scientist but also as a woman of principle who stood her ground in the face of injustice. In 1997 the chemical element Meitnerium (element 109) was named in her honour. She remains the only woman with a statue outside the Humboldt University in Berlin.

Her life was a study in contradictions—groundbreaking but uncelebrated, courageous but humble. Above all, she was a scientist whose legacy reminds us that brilliance need not come at the cost of compassion.