Chien-Shiung Wu has been called “The first lady of physics”, “The Chinese Marie Curie” and “The queen of nuclear physics”, but incredibly enough, she is to most rather unknown. She has contributed with crucial discoveries in nuclear- and quantum physics and also contributed to the Manhattan-project. But she is, like the physician Lise Meitner, written out of history in the movie “Oppenheimer”.
Wu grew up in China, but travelled in the 30ies to the USA, more specifically to Berkeley in California, where she collaborated with prominent physicians like Ernest Lawrence and Robert Oppenheimer.
Shortly before her arrival, the Italian physicist Enrico Fermi had made the theory of beta-decay, but he lacked the experimental proof. Others had tried this without luck, but Wu was the first who succeeded in making the experiments that finally proved Fermi’s theory.
A colleague later said about her:
“The most talented female experimental physicist he had ever known”,
and that
“she would make any laboratory shine.”
After that, Wu moved to the east cost of USA, where she partially engaged in the Manhattan project and partially worked at Columbia University in New York.
On Columbia University, she worked together with two other physicians (Tsung-Dao Lee and Chen Ning Yang) about the physical concept Parity.
Parity dictates a symmetry around mirroring of particle physical processes.
Lee and Yang had published an article, in which the theory suggested an inconsistency in parity for the so called “weak nuclear force” (among other things beta-decay, which Wu was expert in). But they did not know how to prove it experimentally.
But Wu was a master in experimental physics!
She cancelled a vacation with her family, went to the lab, and conducted an experiment that elegantly proved Lee and Wu’s hypothesis. In 1957, Lee and Wu received the Nobel prize for the discovery, but Wu did not get a share of the prize, as the Nobel committee referred to the fact that “she had only shown it experimentally”. It seemed odd, as the Nobel-committee normally used honor experimental science. And Wu’s “colleague” in particle physics, Lise Meitner, was excluded from the Nobel prize Otto Hahn received, with exactly the OPPOSITE argument. Here it was Lise, who had thought of it and the described the theoretical principle (for nuclear fission), but Otto Hahn that had shown it experimentally…
Wu and Meitner both became victims of the Matilda-effect, the term used to describe the historical devaluation and trivialization of women’s contribution to science.
References:
– Chien Shiung Wu Acc. 90-105 – Science Service, Records, 1920s-1970s, Smithsonian Institution Archives
The discovery of the parity violation in weak interactions and its recent developments
Chien-Shiung Wu
Published in: Lect.Notes Phys. 746 (2008), 43-70
Experimental Test of Parity Conservation in Beta Decay
C. S. Wu, E. Ambler, R. W. Hayward, D. D. Hoppes, and R. P. Hudson
Phys. Rev. 105, 1413 – Published 15 February 1957