Showing posts with label Lise Meitner. Show all posts
Showing posts with label Lise Meitner. Show all posts

Thursday, April 17, 2008

Percy Lavon Julian...chemist



Percy Lavon Julian
1899-1975

Gender has given science a bad reputation as previously exemplified by articles on
Lise Meitner , Rosalind Franklin , Mileva Maric [Einstein's first wife] , and Mary Tsingou [Menzel] and race is not immune either. Such is the case with Percy Julian an organic chemist that provided humanity with many medicinal drugs including cortisone.

Julian was born in Montgomery, Alabama to Elizabeth (1878-?) and James Sumner Julian I (1871–?). James was a railway mail carrier for the United States Post Office, and his father was a slave. Elizabeth worked as a school teacher. He grew up in the time of Jim Crow. Among his childhood memories was finding a lynched man hung from a tree while walking in the woods near his home. While it was generally unheard of for African Americans at the time to pursue an education beyond the 8th grade, Julian's father steered all of his children towards higher education. Julian attended DePauw University in Greencastle, Indiana. At the time, the college accepted very few African American students and the town was segregated. Julian was not allowed to live in the college dormitories and initially stayed in an off campus boarding home where he was refused meals. It was days after his arrival before Julian found an establishment that would allow him to eat. Ultimately, he took work firing the furnace and doing other odd jobs in a fraternity house and, in return for his service, he was allowed to sleep in the basement and eat. He graduated from DePauw in 1920 Phi Beta Kappa and valedictorian. By 1930 Julian's father had moved the entire family to Greencastle, Indiana so that all his children could attend college at DePauw, he was still working as a railroad postal clerk.


Julian wanted to obtain his doctorate in chemistry but learned it would be difficult for an African American. He was denied access to American doctorate programs because they felt that the only jobs obtainable post-graduation would be as instructors at all black colleges. After graduating from DePauw, Julian became a chemistry instructor at Fisk University. He then received an Austin Fellowship in Chemistry and went to Harvard University in 1923 for his M.S. Worried that white students would resent being taught by an African American, Harvard withdrew Julian's teaching assistantship and he was unable to complete his Ph.D. at Harvard. In 1929 Julian received a Rockefeller Foundation fellowship to continue his graduate work at the University of Vienna, and he received his Ph.D. in 1931. He studied under Ernst Späth and was considered an impressive student. In Europe, he found freedom from the racial prejudices that nearly stifled him in the States. He freely participated in intellectual social gatherings, went to the opera and found greater acceptance among his peers. Julian was the third African American to receive a Ph.D. in chemistry after St. Elmo Brady and Edward M. A. Chandler.
--Wikipedia.

"Reclaiming a Black Research Scientist's Forgotten Legacy"


by


Felicia R. Lee


February 6th, 2007

The New York Times

On the day that Percy L. Julian graduated at the top of his class at DePauw University, his great-grandmother bared her shoulders and, for the first time, showed him the deep scars that remained from a beating she had received as a slave during the last days of the Civil War. She then clutched his Phi Beta Kappa key in her hand and said, "This is worth all the scars."

Every February, when the curtain lifts on Black History Month, the cast of highlighted lives is often familiar: a Martin Luther King Jr., a Katherine Dunham. But the documentary Forgotten Genius, to be broadcast tonight as part of the Nova science series on PBS, dramatizes the story of Mr. Julian, a largely neglected black chemist who was nonetheless one of the most important scientists of the 20th century. He is played by the Tony Award-winning actor Ruben Santiago-Hudson, and the moment with his great-grandmother is but one in a film full of the echoes of the country’s painful racial history.


The Nova filmmakers’ effort to revive Mr. Julian’s legacy is not only riveting, but also one of the most ambitious projects in the 34-year history of Nova. His work included discoveries in the synthesis of cortisone, an anti-inflammatory used in the treatment of rheumatoid arthritis and many other conditions. In 1999 the American Chemical Society recognized his synthesis of physostigmine, a glaucoma drug, as one of the top 25 achievements in the history of American chemistry. He was the first black chemist ever elected to the National Academy of Sciences.


"It’s been just wonderful," Paula S. Apsell, the senior executive producer for Nova, said of making the two-hour film. "It’s that delicious feeling you get when you know you’re on to something away from the crowd."

Because there was no full biography of Mr. Julian, Ms. Apsell said, about four years went into original research on his story: finding his unpublished autobiography, gathering speeches in which he talked about his life and work, conducting oral histories around the country with those who knew him. The project director was Stephen Lyons, an independent producer who was a co-writer and co-producer of the film with Llewellyn M. Smith (an associate producer for Eyes on the Prize). Mr. Smith is the director of Forgotten Genius.

Narrated by the actor Courtney B. Vance (Ron Carver on Law & Order: Criminal Intent), Forgotten Genius relies on a combination of interviews and dramatic re-enactments. Early on, viewers see the sheer odds against Mr. Julian, who was born in Montgomery, Ala., in 1899 and died in 1975.


In one scene he is 12, walking in the Alabama woods, when he discovers a young lynching victim hanging from a tree. He reaches out and touches the body. The adult Julian comments, "He didn’t look like a criminal; he just looked like a scared boy."


Mr. Smith said, "I think in the film there’s a view of him as a whole human being, and that’s unusual for scientists."

Mr. Julian’s name came up around 1998, Ms. Apsell recalled, when Nova sought to inject some diversity into a series about the lives of scientists, profiles that had included Albert Einstein, Galileo and Isaac Newton.


The dramatic spine of Forgotten Genius has Mr. Julian telling his story in flashback before an audience, documenting a life in which accomplishment and oppression took turns.


Harvard awarded him a master's degree but would not support him in getting his doctorate (he earned it at the University of Vienna); potential employers snubbed him. ("We didn’t know you were a Negro," the DuPont Company told him after inviting him for an interview.)


After doors slammed and opportunities vanished, Mr. Julian landed a job at Howard University, only to become enmeshed in a sex scandal that ended his employment there: He and his future wife were accused of having an affair while she was still married to one of his colleagues.


He spent years teaching at DePauw, in Greencastle, Ind., where a building is now named in his honor, but was denied a faculty position. After almost two decades at the Glidden company, where his research made possible a fire-retardant foam widely used in World War II and the mass production of synthetic progesterone, the company told him to concentrate on things like nonsplattering shortening.


By the time he became successful enough to move with his wife and two children into Oak Park, Ill., a mostly white Chicago suburb, their home was the target of a bomb and a fire.


"The good side was, as a kid I got to spend more time with my dad and stay up late, because we’d sit in the tree outside,"
recalls Percy Julian Jr., now a civil rights lawyer in Madison, Wis. "He’d sit there with a shotgun. And we’d talk about why someone would want to do this, and how wrong it was and how stupid it was."


Mr. Santiago-Hudson, who is also a playwright, said the project resonated with his desire to mirror the black American journey. He recalled eagerly reading boxes of material as the filmmakers did their research.

"I became Percy Julian,"
he said. "These are the stories I want to tell. They straighten us out in a society where the people who write the history books want the heroes to look like them."


Mr. Julian is certainly a hero by the end of the film, though he laments, "I feel that my own country robbed me of the chance for some of the great experiences that I would have liked to live through." By 1953 he had established Julian Laboratories (which he sold for more than $2 million in 1961), and he later formed Julian Research Institute, a nonprofit organization. He won accolades for his support of the civil rights struggle and was able to hire many black scientists and inspire many more.

One was James Shoffner, an organic chemistry researcher, who in Forgotten Genius compares Mr. Julian to Jackie Robinson as a barrier-breaker. Mr. Shoffner, 79, said he grew up reading about Mr. Julian in the so-called Negro press and met him in the late 1950s at a meeting of the American Chemical Society. He helped the society organize a symposium on Mr. Julian in 1999 and aided the Nova effort.


"Why he was not well known has to do with a series of factors, the first being the color of his skin," Mr. Shoffner said in a telephone interview. "Also, he did his science in a small liberal arts college in the middle of the country, and he did his science in industry. Those are two places not thought of as producing world-class science."

Already, because of the interest generated by the making of the film, Gerry Walanka, a Chicago lawyer and businessman, has begun a fund called In Search of Genius Foundation to help minority students interested in science. "We want to build on his story in a way that motivates young people," Mr. Walanka said. Nova is turning over more than 2,000 pages of transcripts from the film to an archive of the Julian family’s choice so that there can finally be a chance for a scholarly look at Mr. Julian.


"It certainly gives hope to young people about what you can be if you never, ever, ever give up,"
Mr. Julian’s son said. "That was the message our father gave us."


And from
Depauw University e-history:

Percy Lavon Julian was born in Montgomery, Alabama in 1899. He was the grandson of a slave and the oldest child of James Sumner Julian, a railway mail clerk, and Elizabeth Adams Julian, a schoolteacher. After graduating from a small normal school in his home town, he entered DePauw University as a "subfreshman" in the fall of 1916. At first he lived in the attic of a fraternity house, where he worked as a janitor and waiter in return for room and board. Later his parents moved to Greencastle to establish a home for Percy and his two brothers and three sisters, all of whom eventually graduated from DePauw.

Percy quickly made up his academic deficiencies and majored in chemistry under the guidance of Professor William M. Blanchard. The southern-born Blanchard recognized his protégé's scientific potential but recommended that he find a teaching position in a black college after graduation rather than undertake advanced training, because his skin color would limit his chances for success as a chemist.

Graduating from DePauw in 1920 at the top of his class, Percy accepted an instructorship in chemistry at Fiske University. Two years later he received a fellowship to study at Harvard, where he earned an M.A. in 1923. After two more years spent at Harvard on various research grants, he went to West Virginia State College for Negroes and later to Howard University to teach chemistry. Taking leave to study at the University of Vienna, where he received a Ph.D. in 1931, Julian found his career momentarily blocked at Howard and had to look elsewhere for a suitable position.

In 1932 his old mentor Professor Blanchard, now academic dean of DePauw University, invited Julian to return to his alma mater as a research associate in organic chemistry. For four years Julian carried on research in Minshall Laboratory that led to the successful synthesis of physostigmine, a drug used in the treatment of glaucoma. But DePauw lost the opportunity to retain the services of a brilliant scientist when the board of trustees proved unwilling to grant the black chemist a regular faculty position. Instead, in 1936 Julian became director of research for the Soya Products Division of the Glidden Company in Chicago. Percy L. Julian


During 17 years with that company he developed such products as fire-fighting foam and perfected methods for the mass production of hormones. In 1953 he formed his own company, Julian Laboratories, Inc. with headquarters in Franklin Park, Ill. and branches in Mexico and Guatemala. One of his major accomplishments was a process for the commercial production of the arthritis drug cortisone. Eventually selling the company to two large pharmaceutical firms, he organized Julian Associates and the Julian Research Institute in 1964, continuing his work as a research scientist and consultant until his death in 1975.

Throughout his life Julian maintained a deep interest in DePauw University, visiting the campus frequently as a guest lecturer, becoming a trustee in 1967, and even purchasing a farm near Greencastle as a country retreat. After his death his widow, Dr. Anna Johnson Julian, and their children, Faith and Percy Jr., established a trust fund to support research programs in the university's chemistry department and an annual Percy L. Julian Memorial Lecture. Also included was a scholarship fund to enable talented students to prepare themselves for careers in chemistry or related fields. Finally, in 1980 DePauw University rededicated the recently constructed building housing the mathematics and physical science departments as the Percy L. Julian Science and Mathematics Center.

And NOVA offered a fine production... Ruben Santiago-Hudson as Percy Julian in NOVA's Percy Julian: Forgotten Genius

NOVA

Transcript


Wednesday, April 16, 2008

"The Mother of Nuclear Fision"





Otto Hahn and Lise Meitner

We certainly wish that this will be the last instance of gender and ethnic intollerence for a truly sound realm of science should not judge the person doing the research and should be independent of political and racial beliefs. This is the story of Lise Meitner...dubbed "The Mother of Nuclear Fision" and co-discoverer of the element protactinium [No. 91] in 1918.

atomicarchive:

Lise Meitner (1878 - 1968)


Lise Meitner was born on November 7, 1878, in Vienna, Austria. The third of eight children of a Jewish family, she entered the University of Vienna in 1901, studying physics under Ludwig Boltzmann. After she obtained her doctorate degree in 1906, she went to Berlin in 1907 to study with Max Planck and the chemist Otto Hahn. She worked together with Hahn for 30 years, each of them leading a section in Berlin's Kaiser Wilhelm Institute for Chemistry. Hahn and Meitner collaborated closely, studying radioactivity, with her knowledge of physics and his knowledge of chemistry. In 1918, they discovered the element protactinium.

In 1923, Meitner discovered the radiationless transition known as the Auger effect, which is named for Pierre Victor Auger, a French scientist who discovered the effect two years later.

After Austria was annexed by Germany in 1938, Meitner was forced to flee Germany for Sweden. She continued her work at Manne Siegbahn's institute in Stockholm, but with little support, partially due to Siegbahn's prejudice against women in science. Hahn and Meitner met clandestinely in Copenhagen in November to plan a new round of experiments. The experiments that provided the evidence for nuclear fission were done at Hahn's laboratory in Berlin and published in January 1939. In February 1939, Meitner published the physical explanation for the observations and, with her nephew, physicist Otto Frisch, named the process nuclear fission. The discovery led other scientists to prompt Albert Einstein to write President Franklin D. Roosevelt a warning letter, which led to the Manhattan Project.

In 1944, Hahn was awarded the Nobel Prize for Physics for his research into fission, but Meitner was ignored, partly because Hahn downplayed her role ever since she left Germany. The Nobel mistake, never acknowledged, was partly rectified in 1966, when Hahn, Meitner, and Strassman were awarded the Enrico Fermi Award. On a visit to the U.S. in 1946, she was given total American press celebrity treatment, as someone who had "left Germany with the bomb in my purse."

Meitner retired to Cambridge, England, in 1968, where she died October 27. In 1992, element 109, the heaviest known element in the universe, was named Meitnerium (Mt) in her honor. Many consider Lise Meitner the "most significant woman scientist of the 20th Century."

Lise Meitner was born on November 7, 1878 in Vienna, Austria. Upon receiving a doctorate in physics from the University of Vienna in 1906, Meitner went to the University of Berlin. There, she began to work with a chemist, Otto Hahn, she doing the physics and he the chemistry of radioactive substances. The collaboration continued for 30 years, each heading a section in Berlin's Kaiser Wilhelm Institute for Chemistry.

In 1938 she was forced to leave Germany and went to Sweden. In her absence, Hahn and Fritz Strassmann continued experiments they had begun earlier with Meitner. Hahn wrote to Meitner, describing the results and while visiting her nephew Otto Frisch in Denmark, they proved that a splitting of the uranium atom was energetically feasible. This process was described in a landmark 1939 letter to the journal Nature with a term borrowed from biology: fission. Immediately, these results were confirmed around the world. In 1944, Hahn was awarded the Nobel Prize for Physics for his research into fission, but Meitner was ignored. The Nobel mistake, never acknowledged, was partly rectified in 1966, when Hahn, Meitner, and Strassmann were awarded the Enrico Fermi Award.

She retired to Cambridge, England where she died October 27, 1968. In 1997, it was announced that element 109 would be given the official name meitnerium (Mt) in her honor.

Excerpt from NOVA's Einstein's Big Idea:

NARRATOR: Max Planck encourages the world's most eminent physicists to take Einstein seriously. After four years of waiting he is appointed Professor of Physics at Zurich University. From there his career is meteoric. He is made Professor of Physics in Berlin, achieves world renown and becomes a household name. He is the undisputed father of modern physics.

But Einstein's success was the downfall of his marriage. In 1919, he divorced Mileva and married his cousin. His fame led to numerous affairs.

E = mc2 became the Holy Grail of science. It held out the promise of vast reserves of energy locked deep inside the atom. Einstein suspected that it would take a hundred years of research to unlock it. But he hadn't banked on the Second World War and the genius of a Jewish woman in Hitler's Germany.

Twenty-eight year old Austrian Lise Meitner was painfully shy. Despite her anxiety, the young Doctor of Physics arrived in Berlin determined to pursue a career in the exciting, new field of radioactivity. Unfortunately, in 1907, German universities did not employ female graduates. Luckily, one man came to her aid.

OTTO HAHN: Fraulein Meitner?

LISE MEITNER: Yes?

OTTO HAHN: Otto Hahn. I'm a researcher in the Chemistry Institute. Professor Planck suggested I...

LISE MEITNER: Ah yes, Herr Hahn. I have read both your papers on Thorium and Mesothorium. Dr. Planck suggested that I...

OTTO HAHN: Yes, he suggested I speak to you. I need someone to collaborate with.

LISE MEITNER: I think I could really help with the physical analysis.

OTTO HAHN: And the mathematics?

LISE MEITNER: Yes, yes, and the mathematics.

OTTO HAHN: Studying radioactive atoms has become so much a collaboration between chemistry and physics these days.

LISE MEITNER: Yes, yes.

OTTO HAHN: I'll ask Fischer for a laboratory then.

LISE MEITNER: Excellent.

OTTO HAHN: I'll speak to you soon.

NARRATOR: Lise Meitner had just taken the first step on a journey that would irrevocably change world history. For her, it would be a road marked with success and renown, but also with terror and betrayal.

DAVID BODANIS: At this time, not a lot was known about the atom. At first people thought it was like a miniature cellular system, there's a solid nucleus of the center and electrons would spin around it, sort of like planets around our sun. A little later, some researchers proposed that the nucleus itself wasn't a solid chunk but was made up of separate particles, of protons and neutrons. But then, in what are called radioactive metals, things like radium and uranium, the nucleus itself seemed to be unstable, leaking out energy and particles. Perhaps this was an example of E = mc2, the mass of a nucleus turning into energy?

NARRATOR: Meitner and Hahn's collaboration to unlock the secrets of the atom, started out on an extremely unequal footing. He was given a laboratory. She was forced to work in a woodshop.

OTTO HAHN: I see you haven't set your hair on fire?

LISE MEITNER: Herr Hahn?

OTTO HAHN: The boss. He thinks that if he lets women into the Chemistry Institute they'll set their hair on fire.

LISE MEITNER: Ah, so his beard must be fireproof.

STAFF MEMBER (Dramatization): Good day, Herr Hahn.

OTTO HAHN: Good day.

LISE MEITNER: You see. I am nonexistent to this place. At least physicists recognize me for my abilities.

OTTO HAHN: Ah, yes, where would we chemists be without the steadying hand of the physicist?

RUTH LEWIN SIME (Meitner Biographer): It took years, but Lise lost her shyness eventually. In 1912, she and Hahn moved to the brand new Kaiser Wilhelm Institute for Chemistry where their status was really that of equals. Lise became the first woman in Germany to have the title of Professor.

OTTO HAHN: Lise, I have news. You remember the art student I told you of?

LISE MEITNER: Yes. Edith.

OTTO HAHN: Yes, well, I have asked her to marry me, and she has accepted.

LISE MEITNER: Ah. Doctor Hahn, congratulations.

OTTO HAHN: Yes, well, I wanted you to be the first to know.

LISE MEITNER: I'm very pleased for you, very pleased.

RUTH LEWIN SIME: Lise Meitner was warm hearted by nature, she had many friends, and she may have wanted to have a closer relationship with Otto. But it really does seem that physics was Lise's first love, maybe even her passion.

NARRATOR: The 1920s and '30s were the golden age of nuclear research. The largest known nucleus at the time was that of the Uranium atom containing 238 protons and neutrons. Meitner and Hahn were leading the race to see if even bigger nuclei could be created by adding more neutrons.

LISE MEITNER: So, the atom-pretty familiar, nucleus in the center, electrons orbiting around. The nucleus is our focus: the nucleus, made up of protons and neutrons. Now, the largest nucleus we know is that of the Uranium atom. Its nucleus is a tightly packed structure of 238 protons and neutrons. The thrust of our work is to try to fire neutrons into this huge structure, and if we can get a neutron to stick in here, it will be a breakthrough.

NARRATOR: Meitner may have been on the brink of a major discovery, but Germany in the 1930s was a dangerous place to be, even for a world-class scientist.

KURT HESS: The Jewess endangers our Institute.

RUTH LEWIN SIME: When the Nazis came to power, one of the first things they did was to drive out Jewish academics from the universities. Einstein was very prominent, and for that reason he was one of the first to go. He was hounded out of Germany in 1933. Lise was not dismissed at that time. She was able to stay because she was Austrian. But in March 1938, Austria was annexed into Germany, and at that point her situation became untenable.

OTTO HAHN: What is it?

LISE MEITNER: Frightening news.

FRITZ STRASSMAN (Dramatization): What's happened?

LISE MEITNER: Kurt Hess is going around saying that I should be got rid of.

OTTO HAHN: I, I actually knew. I heard today. I was going to speak to the treasurer of the Institute before I told you. We'll speak to him tomorrow. Come on, let's get you home. It's late. We'll finish up.

NARRATOR: The pressure on Meitner was unbearable. Hahn, who was known for his anti-Nazi views, did his best to protect her, at least initially.

OTTO HAHN: I need to talk to you about Lise.

HEINRICH HORLEIN (Dramatization): Not now, I'm too busy.

OTTO HAHN: We have to protect her.

HEINRICH HORLEIN: How? What can we do? The situation is the way it is. Who knows what could happen next? She can't stay. It's just not tenable.

OTTO HAHN: But she hasn't got a visa or even a valid passport, and she may soon be forbidden to leave Germany.

HEINRICH HORLEIN: We can't harbor a Jew. If she stays the regime will shut us all down.

OTTO HAHN: Lise, Horlein demands that you leave.

FRITZ STRASSMAN: You can't throw her out.

OTTO HAHN: Horlein says you should not come into the Institute any more.

LISE MEITNER: Well, I have to write up the thorium irradiation tomorrow, so I have to come in.

FRITZ STRASSMAN: You've given up.

NARRATOR: When it became clear that Meitner would be dismissed and probably arrested, physicists all around Europe wrote letters inviting her to conferences, giving her an excuse to leave Germany. The Nazis refused to let her go. In July of 1938, a Dutch colleague traveled to Berlin and illegally took Lise back with him on a train to Holland. The trip was so frightening that at one point she begged to go back. Despite the great danger, she got through.

RUTH LEWIN SIME: She had lost everything: her home, her position, her books, her salary, her pension, even her native language. She had been cut off from her work just at the time when she was leading the field and was on the brink of a major scientific discovery.

NARRATOR: No matter what privations she suffered, Lise was still thinking of physics. Amazingly she and Hahn were able to collaborate by letter.

LISE MEITNER: I hope, my dear Otto, that after 30 years of work together and friendship in the institute, that at least the possibility remains that you tell me as much as you can about what is happening back there.

RUTH LEWIN SIME: Lise was invited by an old student friend to spend Christmas on the west coast of Sweden. Her nephew, Otto Robert Frisch, who was also a physicist, came to join her there.

OTTO ROBERT FRISCH: Aunt? Aunt? Aunt Lise? How are you, my dear? Merry Christmas? Aunt?

LISE MEITNER: I need your help, come on let's go out.

OTTO ROBERT FRISCH: But, I was hoping you'd help me.

NARRATOR: Back in Berlin, Hahn was getting strange results. He found no evidence to suggest that bombarding the uranium nucleus with neutrons had caused it to increase in size. In fact, his experiments seemed to be contaminated with radium, a smaller atom. He desperately needed Meitner's expert analysis. From afar, she was starting to suspect that something very different was happening in their experiment.

LISE MEITNER: Hahn and Strassman are getting some strange results with the uranium work.

OTTO ROBERT FRISCH: Really?

LISE MEITNER: A couple of months ago Hahn told me that they were finding radium amongst the uranium products. We are looking for a much bigger element, and here we are finding something much smaller. I urged Hahn to check again, it couldn't be radium. And now he writes to me and tells me that it's not radium, it's barium.

OTTO ROBERT FRISCH: But that's even smaller.

LISE MEITNER: Exactly. Hahn is sure that it's another error, but I don't know any more. It is at least possible that barium is being produced.

OTTO ROBERT FRISCH: So Hahn still needs you to interpret the data.

LISE MEITNER: It is my work too, you know.

OTTO ROBERT FRISCH: Exactly.

LISE MEITNER: Well, I can't be there, can I? Come on, let's walk.

OTTO ROBERT FRISCH: Surely, he's made a mistake, hasn't he? He hasn't done what you told him to.

LISE MEITNER: My darling, Robert, he may not be a brilliant theorist, but he's too good a chemist to get this wrong.

RUTH LEWIN SIME: If you imagine a drop of water, a big drop, it's unstable, on the verge of breaking apart. It turns out that a big nucleus like uranium is just like that. Now for four years Meitner and Hahn and all other physicists had thought that if you pump more neutrons into this nucleus, it'll just get bigger and heavier. But suddenly Meitner and Frisch, out in the midday snow, realized that this nucleus might just get so big that it would split in two.

LISE MEITNER: If the nucleus is so big that it has trouble staying together, then couldn't just a little tiny jog from a neutron and...

OTTO ROBERT FRISCH: Yes, but if the nucleus did split, the two halves would fly apart with a huge amount of energy. Where's that energy going to come from?

LISE MEITNER: How much energy?

OTTO ROBERT FRISCH: Well, we worked out that the mutual repulsion between two nuclei would generate about 200 million electron volts. But something has to supply that energy.

LISE MEITNER: Wait, let me do a packing fraction calculation. The two nuclei are lighter than the original uranium nucleus by about one-fifth of a proton in mass.

OTTO ROBERT FRISCH: What? So some mass has been lost? Einstein's E = mc2?

LISE MEITNER: If we multiply the lost mass by the speed of light squared we get...200 million electron volts. He's split the atom.

OTTO ROBERT FRISCH: No, no, no. You've split the atom.

RUTH LEWIN SIME: It was an amazing discovery. Of course in the laboratory we are talking about tiny amounts of uranium and correspondingly tiny amounts of energy. But the point is that the amount of energy released was relatively large and that came from the mass of the uranium itself. The energy released was entirely consistent with Einstein's equation, E=mc2.

NARRATOR: Meitner and Frisch published the discovery of what they called nuclear fission to great acclaim. But betrayal awaited them. Otto Hahn was under pressure from the Nazi regime to write his Jewish colleague out of the story. He alone was awarded the 1944 Nobel Prize for the discovery. In his speech he barely mentioned the leading role of Meitner. Bizarrely even after the war, Hahn maintained it was he and not Meitner who had discovered nuclear fission.

LISE MEITNER: Now I want to write something personal, which disturbs me and which I ask you to read with more than 40-year friendship in mind, and with the desire to understand me. I am [now] referred to as "Hahn's long time co-worker." How would you feel if you were only characterized as the longtime co-worker of me? After the last 15 years, which I wouldn't wish on any good friend, shall my scientific past also be taken from me? Is that fair? And why is it happening?

DAVID BODANIS: Lise Meitner had been working on this for 30 years. She'd only broken apart a handful of atoms, but that was enough, once she had broken even one, the genie was out of the bottle.

What Meitner had started...after that physicists around the world began to realize they could take it a lot further.

NARRATOR: In 1942, an intense effort to build an atom bomb was begun. All over America, secret installations sprang up under the code name "The Manhattan Project."

DAVID BODANIS: Meitner was asked to join the Manhattan project, and she refused. She refused to have anything to do with the atomic bomb. But Robert Frisch was different. He was an important member of the team, because he was convinced of the need to beat the Nazis in a nuclear arms race.

Lise Meitner


Lise Meitner: A Life in Physics

by


Ruth Lewin Sime

ISBN-10: 0520208609