Who was Marie Curie
Marie Skłodowska Curie was born in Warsaw on 7 November 1867 and died in France on 4 July 1934. She developed her scientific career in Paris, investigating radioactivity and receiving the 1903 Physics and 1911 Chemistry Nobel Prizes. She was the first person to receive two Nobel Prizes. [1]
From Warsaw to the Sorbonne
She grew up in a teaching family in Russian-controlled Warsaw. Her father introduced her to physics and scientific instruments. With women excluded from university study, she attended the Floating University, whose classes moved between locations to avoid the authorities’ surveillance. [7]
She enrolled at the Sorbonne in 1891, earning degrees in physics in 1893 and mathematics in 1894. A commission to study the magnetic properties of different steels led her to seek laboratory space. She met Pierre Curie in 1894; they married the following year and established a scientific partnership. [8]
How she investigated radioactivity
Building on Henri Becquerel’s uranium rays, she used instruments developed by Pierre and Jacques Curie to measure small currents in irradiated air. Comparing substances and conditions led her to propose that the emission was an atomic property. The method turned an observed effect into a phenomenon that could be measured and compared. [9]
Polonium and radium: the 1898 discoveries
Some minerals were more active than pure uranium. Marie and Pierre chemically separated their constituents and measured the fractions to trace unknown substances. They announced polonium, named after Poland, in July 1898, followed by radium in December. Identification combined chemical separation with physical measurement. [10]
The radium paper of 26 December 1898 has three authors: Pierre Curie, Marie Curie and Gustave Bémont. It reports increasing activity in selected fractions and a spectral line observed by Eugène Demarçay. This evidence supported the presence of a new element even though the sample still contained substantial barium. [11]
Doctorate and research consolidation
She defended her thesis on radioactive substances in Paris on 25 June 1903. It brought together research from the years of discovery and characterization of the new elements. The doctorate preceded that year’s Physics Nobel Prize and consolidated her position as a researcher with her own programme. [27]
What her two Nobel Prizes recognised
The 1903 Physics Nobel recognised research on the radiation discovered by Becquerel: he received half the award, while Marie and Pierre shared the other half. [2] The 1911 Chemistry Nobel went entirely to Marie for discovering polonium and radium, isolating radium and investigating its compounds. [15]
From discovery to metallic radium
Identifying an element and obtaining its metal were separate stages. Curie continued separating and characterising radium and, with André Debierne, isolated its metallic form in 1910. Her 1911 Nobel lecture placed these findings within the changes radioactivity was bringing to chemical concepts. [12]
Teaching and academic barriers
Following Pierre’s death in 1906, she took over his teaching duties and delivered her first Sorbonne lecture on 5 November, discussing advances in electricity and matter. [13] She became a full professor in 1908. In 1911 she faced press campaigns marked by sexism and xenophobia. [14]
The Radium Institute and medical research
The University of Paris and Pasteur Institute initiated the Radium Institute in 1909; its building was completed in 1914. Curie led physics and chemistry, while Claudius Regaud directed biological and medical studies. The Curie Foundation, established in 1921, enabled a dispensary to open in 1922, connecting experimental research with cancer care. [16]
Radiology during the First World War
In August 1914, the military health service asked her to investigate operator training and identify available radiographic equipment. She became inspector of the radiography service of the French Women’s Union within the Red Cross. Her response combined scientific knowledge, equipment organisation and training to support wounded patients. [17]
She equipped vehicles with X-ray apparatus to locate projectiles and fractures near the front. Irène took part in this work. Marie learned driving and mechanics while familiarising herself with anatomy and equipment operation. Known as petites Curies, the units brought diagnostic imaging closer to places with limited medical facilities. [18]
From 1916 she organised radiological-assistant courses at the Radium Institute with Irène’s help. The American Institute of Physics records that approximately 150 women trained there. She also taught American military personnel in 1919. Training allowed the service to extend beyond what mother and daughter could operate themselves. [19]
Funding and links with Poland
Journalist Marie Mattingly Meloney organised an American campaign to purchase a gram of radium for Curie’s research, raising over $100,000 and arranging her May–June 1921 visit. Columbia preserves Curie’s handwritten account and records of the collective effort that secured the material. [20]
A second American campaign in 1929 raised funds for another gram of radium. Curie directed it to the Warsaw institute, sustaining a practical connection with scientific development in her country of origin. Fundraising became an important part of her work building research institutions. [21]
Cooperation and scientific opportunities
She participated in Solvay meetings from 1911 and the League of Nations Committee on Intellectual Cooperation from 1922. [2] A 1926 memorandum preserved at Columbia records her proposal on international scholarships for scientific advancement, showing an institutional commitment to researcher training and mobility. [22]
Books and later research
Her two-volume Traité de radioactivité, published in 1910, organised the field she had helped establish. [24] La radiologie et la guerre followed in 1921. Later publications include studies of radioactive constants, radium D with Irène and ionium with Sonia Cotelle. [23]
Recognition and legacy
Alongside her Nobel Prizes, she received the 1903 Davy Medal with Pierre. On 7 February 1922 she was elected to the French Academy of Medicine, after an unsuccessful Academy of Sciences candidacy in 1911. Her election opened an institution that had previously excluded women. [25]
On 20 April 1995, her remains and Pierre’s were transferred to the Paris Panthéon. Marie was the first woman admitted for her own achievements. [26] Her scientific legacy continued through Irène Joliot-Curie, a researcher and Chemistry Nobel laureate representing a new generation of radioactivity studies. [3]
Measurement and control of radiation exposure
In 1911 Curie prepared a standard containing 21.99 milligrams of pure radium chloride. Compared with Vienna standards in 1912, it provided a reference for samples distributed to national laboratories. Her contribution enabled measurements to be compared against a common reference during the expansion of medical radium use. [5]
Comparable measurements remain necessary in occupational radiation protection. IAEA guidance GSG-7 requires monitoring programmes to define quantities, measurement locations and frequency, methods and record keeping. Curie’s contribution belongs to the history of metrology; these occupational monitoring programmes developed later. [6]
