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Lise Meitner: Nuclear Fission Discovery, Protactinium & Element Meitnerium

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Biographical timeline of Austrian-Swedish physicist Lise Meitner, who led the team that discovered nuclear fission of uranium. Her life spanned from her birth in Vienna in 1878 to her death in Cambridge in 1968, with key contributions including the discovery of protactinium and the theoretical explanation of nuclear fission.

Chronological Storyline (36 Milestones)

Nov 7, 1878 CE

Lise Meitner Born in Vienna

Lise Meitner is born in Vienna, Austria-Hungary, as the third of eight children of Jewish parents Hedwig and Philipp Meitner. #science #physics #history

Lise Meitner Born in Vienna
Lise Meitner Born in Vienna
By Harris & Ewing - https://www.nationalgeographic.com/science/article/nobel-prize-winners-laureates-charts-graphics-science, Public domain, https://commons.wikimedia.org/w/index.php?curid=159322196
1901 CE

Enters University of Vienna

Meitner enrolls at the University of Vienna to study mathematics and physics, after preparing for the entrance exams with private tutoring. #science #physics

1905 CE

Earns PhD in Physics

Meitner earns her doctorate in physics from the University of Vienna, with a dissertation on thermal conduction. She is one of the first women to earn a PhD there. #science #physics

1907 CE

Moves to Berlin and Joins Kaiser Wilhelm Institute

Meitner moves to Berlin, initially attending lectures by Max Planck. She begins collaborating with Otto Hahn at the Kaiser Wilhelm Institute for Chemistry. #science #history

1908 CE

Discovers beta-ray spectra

Meitner and Hahn begin investigating beta-ray spectra, discovering new isotopes. This work establishes their collaboration. #science #physics

1912 CE

Becomes Assistant to Otto Hahn

Meitner becomes an assistant to Hahn at the Kaiser Wilhelm Institute, despite initial resistance due to her gender. She works without pay for several years. #science #history

1913 CE

Discovers Protactinium with Hahn

Meitner and Hahn discover the element protactinium (atomic number 91) while studying uranium decay. This is a major contribution to the periodic table. #science #chemistry

Discovers Protactinium with Hahn
Discovers Protactinium with Hahn
By James St. John - https://www.flickr.com/photos/47445767@N05/54041583415/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=155677744
1917 CE

Takes Over Own Physics Section

Meitner is given her own physics section at the Kaiser Wilhelm Institute, though she still faces discrimination. She continues research on radioactivity. #science #history

1922 CE

Becomes First Woman to Hold Venia Legendi in Physics at Berlin

Meitner habilitates at the University of Berlin, becoming one of the first women to become a professor in Germany. She gives lectures on nuclear physics. #science #physics

1926 CE

Becomes Extraordinary Professor at University of Berlin

Meitner is appointed as an extraordinary professor (associate professor) at the University of Berlin, a rare achievement for a woman in science at the time. #science #history

1930 CE

Begins Investigating Neutron Bombardment of Uranium

Meitner and Hahn begin experiments bombarding uranium with neutrons, following Enrico Fermi's work. This leads to the discovery of nuclear fission. #science #physics

1934 CE

Collaborates with Hahn and Strassmann

Meitner, Hahn, and Fritz Strassmann systematically study neutron-induced reactions in uranium, trying to identify transuranium elements. #science #chemistry

Jul 13, 1938 CE

Flees Nazi Germany to Sweden

After the Anschluss, Meitner, being Jewish, escapes Germany with help from Dutch physicists and moves to Sweden. She continues her research at Manne Siegbahn's institute in Stockholm. #history #science

Dec 1, 1938 CE

Hahn and Strassmann Discover Barium in Uranium Bombardment

Hahn and Strassmann chemically identify barium as a product of neutron bombardment of uranium, puzzling over the result. They inform Meitner in letters. #science #chemistry

Jan 1, 1939 CE

Explains Nuclear Fission with Otto Frisch

Meitner and her nephew Otto Frisch provide the theoretical explanation of nuclear fission: the uranium nucleus splits into smaller nuclei, releasing energy. They coin the term 'fission'. #science #physics

Explains Nuclear Fission with Otto Frisch
Explains Nuclear Fission with Otto Frisch
By Created by Fastfission in Illustrator. The SVG code is valid. This vector image was created with a text editor. Please do not replace the simplified code of this file with a version created with Inkscape or any other graphical vector graphics editor - Own work, Public domain, https://commons.wikimedia.org/w/index.php?curid=486924
Feb 1, 1939 CE

Publication of Fission Paper in Nature

Meitner and Frisch publish their explanation of fission in the journal Nature. This discovery opens the door for nuclear energy and weapons. #science #physics

1940 CE

Denied Nobel Prize for Fission Discovery

Though Meitner's work was central, she was not included in the Nobel Prize awarded to Hahn in 1944. This is a notable oversight in Nobel history. #history #science

1945 CE

Invited to Manhattan Project but Declines

Meitner is invited to work on the Manhattan Project but refuses, saying 'I will have nothing to do with a bomb!' She remains in Sweden. #history #science

1946 CE

Visits the United States

Meitner visits the United States to give lectures and receives some recognition, but she does not achieve the same fame as other Manhattan Project scientists. #science #history

1947 CE

Retires from Active Research

Meitner retires from the Nobel Institute for Physics in Stockholm, though she continues to attend scientific conferences and advise younger scientists. #science #history

1949 CE

Receives Max Planck Medal

Meitner is awarded the Max Planck Medal for her contributions to theoretical physics, one of the highest honors in German physics. #science #physics

1955 CE

Moves to Cambridge, England

Meitner moves to Cambridge to be near her nephew Otto Frisch and other relatives. She continues her association with the Cavendish Laboratory. #history #science

1957 CE

Receives Otto Hahn Prize

Meitner receives the Otto Hahn Prize for Chemistry and Physics, but the prize is awarded to both her and Otto Hahn, though she had been excluded from the Nobel. #science #history

1959 CE

Awarded the Helmholtz Medal

Meitner is awarded the Helmholtz Medal of the Berlin-Brandenburg Academy of Sciences and Humanities. #science #physics

1960 CE

Receives the Austrian Science Prize

Meitner receives the Austrian Science Prize for her lifetime achievements in nuclear physics. #science #history

1963 CE

Receives Enrico Fermi Award

Meitner is awarded the Enrico Fermi Award by the United States government for her contributions to nuclear science, shared with Hahn and Strassmann. #science #physics

1965 CE

Publishes Autobiography 'A Scientist Speaks'

Meitner publishes a collection of essays and reflections titled 'A Scientist Speaks', discussing her life and the ethics of science. #books #science

1966 CE

Awarded the Wilhelm Exner Medal

Meitner receives the Wilhelm Exner Medal in Austria for excellence in science. #science #history

1967 CE

Receives an Honorary Doctorate from the University of Vienna

Meitner is awarded an honorary doctorate from the University of Vienna for her groundbreaking contributions to physics. #science #education

Oct 27, 1968 CE

Dies in Cambridge, England

Lise Meitner dies in Cambridge at the age of 89. She is buried at the parish church of St. James in Bramley, Hampshire. #history #science

1992 CE

Element 109 Named Meitnerium

The International Union of Pure and Applied Chemistry (IUPAC) names element 109 meitnerium in her honor, recognizing her contributions to nuclear physics and the discovery of fission. #science #chemistry

1997 CE

Meitnerium Formally Accepted by IUPAC

After a naming controversy, IUPAC officially adopts the name meitnerium for element 109, solidifying her legacy in the periodic table. #science #chemistry

2000 CE

Name given to a crater on the Moon

A crater on the Moon is named Meitner in her honor, reflecting her lasting impact on science. #science #astronomy )

2006 CE

Lise Meitner Prize Established

The European Physical Society establishes the Lise Meitner Prize for outstanding research in nuclear physics. #science #physics

2016 CE

Google Doodle Honors Lise Meitner

A Google Doodle commemorates Lise Meitner's 138th birthday, raising global awareness of her contributions. #science #history

2020 CE

Biography 'Lise Meitner: A Life in Physics' Published

A comprehensive biography detailing her life and scientific legacy is published by historian Ruth Lewin Sime. #books #science