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Marie Curie

Inventors and scientists

Marie Curie
November 7, 1867, Warsaw, Poland, Russian Empire
July 4, 1934, near Sallanches, France

Polish-born French physicist Marie Curie (née  Maria Skłodowska) was famous for her work on radioactivity. Curie was the first woman to win a Nobel Prize, and she is the only woman to win the award in two different fields.

With Henri Becquerel and her husband, Pierre Curie, she was awarded the 1903 Nobel Prize for Physics. She was the  sole winner of the 1911 Nobel Prize for Chemistry.

Marie Curie

In 1891 Curie went to Paris and began to follow the lectures of Paul Appel, Gabriel Lippmann, and Edmond Bouty at the Sorbonne. There she met physicists who were already well known-Jean Perrin, Charles Maurain, and Aimé Cotton. She worked far into the night in her studentquarters garret and virtually lived on bread and butter and tea. She came first in the licence of physical sciences in 1893 and began to work in Lippmann’s research laboratory. In 1894 she was placed second in the licenceof mathematical sciences. It was in the spring of that year that she met Pierre Curie. They married the following year.

Following Henri Becquerel’s discovery (1896) of a new phenomenon (which later was called “radioactivity”), Marie Curie, looking for a subject for a thesis, decided to fi nd out if the property discovered in uranium was to be found in other matter. She discovered that this was true for thorium at the same time as G.C. Schmidt. Turning her attention to minerals, she found her interest drawn to pitchblende , a mineral whose activity, superior to that of pure uranium, could be explained only by the presence in the ore of small quantities of an unknown substance of very high activity. Pierre Curie then joined her in the work that she had undertaken to resolve this problem and that led to the discovery of the new elements, polonium and radium. While Pierre Curie devoted himself chiefl y to the physical study of the new radiations, Marie Curie struggled to obtain pure radium in the metallic state-achieved with the help of the chemist André-Louis Debierne, one of Pierre Curie’s pupils.

On the results of this research, Marie Curie received her doctorate of science in June 1903 and, with Pierre, was awarded the Davy Medal of the Royal Society. That was also the year in which they shared with Becquerel the Nobel Prize for Physics for the discovery of radioactivity.

The birth of her two daughters, Irène and Ève, in 1897 and  1904  did  not  interrupt  Marie’s  intensive  scientific work. She was appointed lecturer in physics at the École Normale Supérieure for girls in Sèvres (1900) and introduced there a method of teaching based on experimental demonstrations. In December 1904 she was appointed chief assistant in the laboratory directed by Pierre Curie. The sudden death of Pierre Curie (April 19, 1906) was a bitter blow to Marie Curie, but it was also a decisive turning point in her career. Henceforth she was to devote all her energy to completing alone the scientific work that they had undertaken. On May 13, 1906, she was appointed to the professorship that had been left vacant on her husband’s  death; she was the first woman to teach in the Sorbonne. In 1908 she became titular professor, and in 1910 her fundamental treatise on radioactivity was published. After being awarded a second Nobel Prize, for the isolation of pure radium, she saw the completion of the building of the laboratories of the Radium Institute (Institut du Radium) at the University of Paris.

Throughout World War I, Marie Curie, with the help of her daughter Irène, devoted herself to the development of the use of X-radiography. In 1918 the Radium Institute, the staff of which Irène had joined, began to operate in earnest, and it was to become a universal centre for nuclear physics and chemistry. Now at the highest point of her fame, Marie Curie devoted her researches to the study of the chemistry of radioactive substances and the medical applications of these substances.

In 1921, accompanied by her two daughters, Marie Curie made a triumphant journey to the United States, where President Warren G. Harding presented her with a gram of radium bought as the result of a collection among American women. She gave lectures, especially in Belgium, Brazil, Spain, and Czechoslovakia. She was made a member of the Academy of Medicine in 1922, and also was a member of the International Commission on Intellectual Co-operation by the Council of the League of Nations. In addition, she had the satisfaction of seeing the development of the Curie Foundation in Paris and the inauguration in 1932 in Warsaw of the Radium Institute, of which her sister Bronisława became director.

One of Marie Curie’s outstanding achievements was to have understood the need to accumulate intense radioactive sources, not only to treat illness but also to maintain an abundant supply for research in nuclear physics. The resultant stockpile was an unrivaled instrument until the appearance after 1930 of particle accelerators. The existence of a stock of 1.5 grams of radium in Paris at the Radium Institute-in which, over a period of several years, radium D and polonium had accumulated-made a decisive contribution to the success of the experiments undertaken in the years around 1930, in particular those performed by Irène Curie in conjunction with Frédéric Joliot, whom she had married in 1926. This work prepared the way for the discovery of the neutron by Sir James Chadwick and, above all, for the discovery in 1934 by Irène and Frédéric Joliot-Curie of artificial radioactivity.

A few months after this discovery, Marie Curie died as a result of leukemia caused by the action of radiation. Her contribution to physics had been immense, not only in her own work, the importance of which had been demonstrated by the award to her of two Nobel Prizes, but because of her influence on subsequent generations of nuclear physicists and chemists.

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