Biographical timeline of Chinese-American experimental physicist Chien-Shiung Wu, who disproved the law of conservation of parity, highlighting her early life in China, education, wartime work, landmark experiment, and lasting legacy.
Chien-Shiung Wu was born in Liuhe, Taicang, Jiangsu province, China, to Wu Zhongyi, an engineer, and Fan Fuhua. Her father's progressive views encouraged her education. #physics #womeninscience
At age 11, Wu enrolled at Mingde School for Girls in Suzhou, where she excelled in math and science, inspired by Marie Curie. She later transferred to Soochow University Middle School. #education #china
Wu enrolled at National Central University in Nanjing (now Nanjing University), initially studying mathematics but later switching to physics. She graduated in 1934 with a B.S. in physics. #physics #china
Wu graduated first in her class with a Bachelor of Science in physics. She then taught briefly at Zhejiang University and later worked as a research assistant at the National Academy of Sciences. #physics #womeninscience
Encouraged by her mentor, Wu Guanyu, Wu left China for the United States to pursue graduate studies in physics. She initially planned to attend the University of Michigan but was dissuaded by its sexist policies and instead enrolled at UC Berkeley. #physics #immigration
Wu arrived at the University of California, Berkeley, where she met physicist Ernest O. Lawrence and decided to stay. She joined Lawrence's Radiation Laboratory and began her doctoral research under his supervision. #physics #berkeley
Under Lawrence and Emilio Segrè, Wu conducted research on beta decay, a process in atomic nuclei. Her thesis investigated the absorption of beta rays, laying groundwork for her later parity work. #physics #nuclear
Wu earned her Ph.D. in physics from UC Berkeley, with a dissertation on 'The Absorption of Beta Rays.' Despite her achievements, she faced discrimination and was unable to secure a faculty position at a major university. #physics #womeninscience
Wu taught physics at Smith College, a women's college in Massachusetts. She found the environment less stimulating but continued her research during summers at Berkeley. #physics #teaching
Wu married physicist Luke Chia-Liu Yuan, a fellow Chinese-American scientist. Their wedding took place in Pasadena, California. They later had one son, Vincent Wei-Chen Yuan. #personal #physics
During World War II, Wu was recruited to work on the Manhattan Project at Princeton University's Metallurgical Laboratory, where she developed methods for separation of uranium isotopes via gaseous diffusion. #wwii #nuclear
Wu transferred to Columbia University to continue Manhattan Project research, focusing on developing sensitive radiation detectors. She remained at Columbia for the rest of her career. #science #nuclear
After the war, Wu was appointed a research associate at Columbia University, where she began independent research in beta decay and nuclear structure. #physics #career
Wu co-authored a paper with Sheldon Datz and others on the theory of beta decay, confirming the Fermi theory and improving understanding of weak interactions. #physics #research
Wu was promoted to associate professor of physics at Columbia University, one of the first women to hold such a rank in the department. She continued her experimental work on beta decay. #physics #womeninscience
Wu achieved the rank of full professor at Columbia University, a notable milestone for a female physicist at the time. Her experimental precision earned her the nickname 'First Lady of Physics.' #physics #womeninscience
Theorists Tsung-Dao Lee and Chen-Ning Yang approached Wu about experimentally testing the law of conservation of parity in weak interactions. Wu devised a groundbreaking experiment using cobalt-60. #physics #parity
Wu designed an experiment to observe beta decay of polarized cobalt-60 nuclei at cryogenic temperatures, requiring extreme precision and cooling. She collaborated with the National Bureau of Standards. #experiment #physics
Wu's team at Columbia and the National Bureau of Standards measured an asymmetry in beta emission, proving that parity is violated in weak interactions. The result was a major revolution in physics. #parity #discovery
The results were published in a paper titled 'Experimental Test of Parity Conservation in Beta Decay' in Physical Review. The finding overturned a fundamental law and earned Lee and Yang the Nobel Prize later that year. #physics #publication
Tsung-Dao Lee and Chen-Ning Yang received the 1957 Nobel Prize in Physics for predicting parity violation, but Wu was not included. Many considered this a great injustice and sparked debates on gender bias in science. #nobel #controversy
Wu was elected to the National Academy of Sciences, a rare honor for a woman at the time. She also received honorary doctorates from several universities. #honor #science
Wu was appointed to the rank of full professor at Columbia University, one of the first tenured female professors in the physics department. She continued her research on beta decay and nuclear structure. #physics #career
Wu experimentally confirmed the conserved vector current (CVC) theory in beta decay, further validating the weak interaction theory and enhancing understanding of the electroweak force. #physics #research
Wu was awarded the prestigious Cyrus B. Comstock Award from the National Academy of Sciences, recognizing her experimental work. She was the first woman to receive this honor. #award #physics
After the normalization of US-China relations, Wu visited mainland China for the first time since 1936. She met with Chinese scientists and promoted scientific exchanges. #china #diplomacy
Wu was elected president of the American Physical Society, the first woman to hold that office. She used the platform to advocate for women in science. #leadership #womeninscience
President Gerald Ford awarded Wu the National Medal of Science, the highest scientific honor in the United States, for her contributions to the overthrow of the parity law. #award #physics
Wu was awarded the Wolf Prize in Physics, a major international prize, for her work on parity violation. She shared the prize with other physicists, but no Nobel had come. #award #physics
Wu retired from Columbia University at age 68, but continued research and lecturing. She held the title of Michael I. Pupin Professor of Physics until retirement. #retirement #physics
Wu was awarded the Order of the Brilliant Star by the Republic of China (Taiwan) for her contributions to science and her service to the Chinese community. #honor #taiwan
Wu delivered a series of lectures on beta decay at Nanjing University, strengthening scientific ties between China and the United States. She also donated books and equipment. #education #china
Wu was awarded the first Chao Kuang Piao Award for Outstanding Chinese-American Scientists. The award recognized her scientific achievements and role model status. #award #chinese
Asteroid 2611 Wu, discovered by the Purple Mountain Observatory, was named after Chien-Shiung Wu. This was a rare celestial honor for a female scientist. #honor #astronomy
Wu received the Pfizer Award from the New York Academy of Sciences for her contributions to physics, again as the first woman honoree. #award #physics
Wu and her husband established a scholarship fund at Nanjing University to support physics students. The fund continues to promote education in China. #philanthropy #education
Wu was honored with a Blue Plaque in Shanghai, recognizing her as an outstanding Chinese scientist. She was also inducted into the Women's Hall of Fame. #honor #china
Wu published a personal reflection on her career and the parity experiment in the journal 'Physics Today,' highlighting the challenges she faced as a woman in physics. #autobiography #physics
Wu died of a stroke at the age of 84 in New York City. Her ashes were buried in the garden of her hometown in China. She left a legacy as one of the greatest experimental physicists of the 20th century. #obituary #physics
Following her death, Wu received numerous posthumous honors including the naming of a school in China, a U.S. Postal Service stamp, and a Columbia University physics prize in her name. #legacy #honor
The U.S. Postal Service issued a 46-cent stamp honoring Chien-Shiung Wu as part of its 'Women in Science' series, making her the first Asian-American woman to appear on a U.S. stamp. #stamp #recognition
Columbia University established the Chien-Shiung Wu Prize in Physics to honor outstanding women in physics, encouraging future generations. #prize #womeninscience
Various events and conferences were held worldwide to commemorate the 100th anniversary of Wu's birth, including at Nanjing University and Columbia University, highlighting her enduring impact. #centennial #physics