Philip Abelson: The Architect of the Transuranic Age and Statesman of Science
Philip Hauge Abelson (1913–2004) was a rare breed of polymath who moved seamlessly between nuclear physics, chemistry, microbiology, and geophysics. While his name is indelibly linked to the discovery of the first element heavier than uranium, his most enduring legacy may be his role as the "voice of American science" during his twenty-two-year tenure as the editor of Science magazine.
1. Biography: From the Palouse to the Pentagon
Philip Abelson was born on April 27, 1913, in Tacoma, Washington. He remained in the Pacific Northwest for his early education, earning a B.S. in chemistry and an M.S. in physics from Washington State College (now Washington State University).
In 1935, Abelson moved to the University of California, Berkeley, to join the "Rad Lab" under the legendary Ernest O. Lawrence. At the time, Berkeley was the epicenter of the nuclear physics revolution. Abelson earned his Ph.D. in 1939, just as the world was beginning to grasp the terrifying potential of nuclear fission.
His career trajectory was defined by rapid pivots:
- The War Years (1941–1945): He worked for the Naval Research Laboratory and the Manhattan Project, focusing on uranium isotope separation.
- The Carnegie Years (1946–1971): He joined the Carnegie Institution of Washington, eventually serving as the Director of the Geophysical Laboratory and later as the President of the Institution (1971–1978).
- The Editorial Era (1962–1984): As the editor of Science, he transformed the journal into one of the most prestigious and influential scientific publications in the world.
2. Major Contributions: Pushing the Boundaries of the Periodic Table
Abelson’s scientific output was characterized by a "problem-solving" approach that ignored disciplinary boundaries.
Discovery of Neptunium (Element 93)
In 1940, working with Edwin McMillan at Berkeley, Abelson proved the existence of the first transuranic element—an element with an atomic number higher than uranium (92). By bombarding uranium with neutrons using the cyclotron, they identified a substance with a 2.3-day half-life. This was Neptunium-239. This discovery shattered the long-held belief that the periodic table ended at uranium and opened the door to the discovery of plutonium and the rest of the actinide series.
Liquid Thermal Diffusion
During World War II, the Manhattan Project faced a bottleneck: how to enrich Uranium-235 quickly enough for an atomic bomb. Abelson developed the liquid thermal diffusion process. While less efficient than gaseous diffusion, his method was faster to implement. The Navy built a massive plant (S-21) at Oak Ridge based on his designs. This "Abelson Method" provided the initial enrichment for the uranium used in the "Little Boy" bomb dropped on Hiroshima, significantly shortening the war's timeline.
Paleobiology and Geochemistry
After the war, Abelson shifted his focus to the intersection of biology and geology. He was a pioneer in biogeochemistry, discovering that amino acids could be preserved in fossils for hundreds of millions of years. This work provided a chemical clock for studying evolution and the history of life on Earth.
3. Notable Publications
Abelson was a prolific writer, contributing over 400 articles and 500 editorials to Science.
- "Radioactive Element 93" (1940): Published in Physical Review (with Edwin McMillan). This is the foundational paper for transuranic chemistry.
- "Amino Acids in Fossils" (1954): Published in Science. This paper launched a new sub-field of organic geochemistry.
- Energy for Tomorrow (1975): A book reflecting his deep involvement in national energy policy following the 1973 oil crisis.
- Enough of Pessimism (1985): A collection of his Science editorials, showcasing his belief in the power of technology to solve human problems.
4. Awards & Recognition
Though Abelson narrowly missed a Nobel Prize (his collaborator Edwin McMillan won the 1951 Nobel Prize in Chemistry for the discovery of transuranic elements), his honors were numerous:
- National Medal of Science (1987): Awarded by President Ronald Reagan for his contributions to nuclear physics, geophysics, and his leadership at Science.
- Public Welfare Medal (1992): The National Academy of Sciences’ highest honor, recognizing his "extraordinary contributions to the public welfare."
- Distinguished Civilian Service Medal (1945): For his critical contributions to the Manhattan Project.
- The Abelson Site: A 20,000-square-foot research facility at the Carnegie Institution is named in his honor.
5. Impact & Legacy
Abelson’s legacy is twofold: he was a brilliant experimentalist and a masterful administrator of science.
In Physics: He helped launch the nuclear age. His work on isotope separation wasn't just vital for the military; it laid the groundwork for the nuclear navy, particularly the development of the first nuclear-powered submarine, the USS Nautilus.
In Communication: As editor of Science, he turned a struggling publication into a global powerhouse. He used his "Editor’s Column" to advocate for rational energy policies, environmental protection, and increased funding for basic research. He was known for his "no-nonsense" style, often challenging the scientific establishment to be more socially responsible and less insular.
6. Collaborations
Abelson thrived in collaborative environments, though he was often the driving "engine" of the group.
- Edwin McMillan: Their partnership at Berkeley was the definitive "chemist-physicist" duo, leading to the birth of the transuranic era.
- Ross Gunn: At the Naval Research Laboratory, Gunn and Abelson worked together to champion nuclear propulsion for ships, often fighting against a skeptical military bureaucracy.
- Neva Abelson: His wife was a world-class scientist in her own right. A physician and researcher, she was one of the co-developers of the Rh factor blood test, which has saved countless lives. The two occasionally collaborated on biological research.
7. Lesser-Known Facts
- The "Workaholic" Editor: Abelson was famous for his frugality and work ethic. Even as the President of the Carnegie Institution, he reportedly drove an old, beat-up car and preferred to do his own laboratory glassblowing.
- A Near-Miss with Fission: In early 1939, Abelson was within days of discovering nuclear fission himself. He had observed the chemical evidence of uranium splitting but was scooped by Otto Hahn and Fritz Strassmann in Germany. He later remarked that he
"almost had it,"
but the German team beat him to the publication. - The Energy Prophet: Long before it was fashionable, Abelson warned about the "peak oil" crisis and the dangers of dependence on foreign energy. In the 1970s, he advocated for the development of shale oil and synthetic fuels—technologies that only became mainstream decades later.
- A Skeptic of Big Bureaucracy: Despite his high-level government clearances, Abelson was a fierce critic of "Big Science" bureaucracy. He believed that the best discoveries came from small groups of dedicated researchers rather than massive, over-managed government projects.