Darleane C. Hoffman | |
---|---|
Born | Darleane Christian November 8, 1926 Terril, Iowa, U.S. |
Nationality | American |
Alma mater | Iowa State University |
Scientific career | |
Fields | Nuclear chemistry |
Institutions | Los Alamos National Laboratory University of California, Berkeley |
Darleane Christian Hoffman (born November 8, 1926) is an American nuclear chemist who was among the researchers who confirmed the existence of seaborgium, element 106. She is a faculty senior scientist in the Nuclear Science Division of Lawrence Berkeley National Laboratory and a professor in the graduate school at UC Berkeley. [1] In acknowledgment of her many achievements, Discover magazine recognized her in 2002 as one of the 50 most important women in science. [2]
She was born as Darleane Christian on November 8, 1926, at home in the small town of Terril, Iowa, and is the daughter of Carl B. and Elverna Clute Christian. [3] Her father was a mathematics teacher and superintendent of schools; her mother wrote and directed plays.
When she was a freshman in college at Iowa State College (now Iowa State University), she took a required chemistry course taught by Nellie May Naylor, [4] and decided to pursue further study in that field. [5] She received her B. S. (1948) and Ph. D. (1951) degrees in chemistry (nuclear) from Iowa State University. [6]
Darleane C. Hoffman was a chemist at Oak Ridge National Laboratory for a year and then joined her husband at the Los Alamos Scientific Laboratory where—after an extensive delay where she was denied access to the laboratory because the human resources department refused to believe that a woman could be a chemist [7] —she began as a staff member in 1953. She became Division Leader of the Chemistry and Nuclear Chemistry Division (Isotope and Nuclear Chemistry Division) in 1979. [8] She left Los Alamos in 1984 to accept appointments as tenured professor in the department of chemistry at UC Berkeley and Leader of the Heavy Element Nuclear & Radiochemistry Group at Lawrence Berkeley National Laboratory. Additionally, she helped found the Seaborg Institute for Transactinium Science at Lawrence Livermore National Laboratory in 1991 and became its first director, serving until 1996 when she "retired" to become Senior Advisor and Charter Director. [9]
Over her career, Hoffman studied the chemical and nuclear properties of transuranium elements and confirmed the existence of seaborgium. [10]
Right after finishing her doctoral work, Darleane Christian married Marvin M. Hoffman, a physicist. [5] [6] The Hoffmans had two children, Maureane Hoffman, M.D., Ph.D (Duke Medical School) and Dr. Daryl Hoffman (plastic surgeon), [11] both born at Los Alamos. [12]
She is a member of the Norwegian Academy of Science and Letters. [15]
Glenn Theodore Seaborg was an American chemist whose involvement in the synthesis, discovery and investigation of ten transuranium elements earned him a share of the 1951 Nobel Prize in Chemistry. His work in this area also led to his development of the actinide concept and the arrangement of the actinide series in the periodic table of the elements.
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The names for the chemical elements 104 to 106 were the subject of a major controversy starting in the 1960s, described by some nuclear chemists as the Transfermium Wars because it concerned the elements following fermium on the periodic table.
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Edwin Mattison McMillan was an American physicist credited with being the first to produce a transuranium element, neptunium. For this, he shared the 1951 Nobel Prize in Chemistry with Glenn Seaborg.
Albert Ghiorso was an American nuclear scientist and co-discoverer of a record 12 chemical elements on the periodic table. His research career spanned six decades, from the early 1940s to the late 1990s.
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Nobel Prize–winning chemist Glenn T. Seaborg ranked among the most prolific authors in scientific history. With some 50 books, 500 scientific journal articles, hundreds of published speeches, and a lifelong daily journal, a massive volume of written material is available in the Glenn T. Seaborg bibliography with a partial listing given below. Seaborg frequently collaborated with other scientists, co-authors, and staff members to achieve the productivity for which he was so well known. Although most of his writing was in the field of nuclear chemistry, history of science, science education, and science public policy, he has also collaborated on works in sports and collegiate history.
Herbert Lawrence Anderson was an American nuclear physicist who was Professor of Physics at the University of Chicago.
Larned (Larry) Brown Asprey was an American chemist noted for his work on actinide, lanthanide, rare-earth, and fluorine chemistry, and for his contributions to nuclear chemistry on the Manhattan Project and later at the Los Alamos National Laboratory.
Milton Stanley Livingston was an American accelerator physicist, co-inventor of the cyclotron with Ernest Lawrence, and co-discoverer with Ernest Courant and Hartland Snyder of the strong focusing principle, which allowed development of modern large-scale particle accelerators. He built cyclotrons at the University of California, Cornell University and the Massachusetts Institute of Technology. During World War II, he served in the operations research group at the Office of Naval Research.
Barbara Jacak is a nuclear physicist who uses heavy ion collisions for fundamental studies of hot, dense nuclear matter. She is director of the Nuclear Science Division, Lawrence Berkeley National Laboratory, and a professor of physics at UC Berkeley. Before going to Berkeley, she was a member of the Department of Physics and Astronomy at Stony Brook University, where she held the rank of distinguished professor. She is a leading member of the collaboration that built and operates the PHENIX detector, one of the large detectors that operated at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory, and was involved in the discovery of the quark gluon plasma and its strongly coupled, liquid-like behavior. Throughout her career she has served on many advisory committees and boards, including the National Research Council Committee on Nuclear Physics, and the Physical Review C editorial board.
Ralph Arthur James was an American chemist at the University of Chicago who co-discovered the elements curium (1944) and americium (1944–1945). Later he worked at UCLA and for the Lawrence Livermore laboratory in California.
Dawn Angela Shaughnessy is an American radiochemist and principal investigator of the heavy element group at the Lawrence Livermore National Laboratory. She was involved in the discovery of five superheavy elements with atomic numbers 114 to 118.
Carol Travis Alonso is a Canadian-born American physicist, author and horsewoman. She was a co-discoverer of Element 106, Seaborgium, with Nobel laureate Glenn Seaborg and other team members at Lawrence Berkeley National Laboratory.
Carol Jean Burns is an American chemist who is deputy director of Research at Lawrence Berkeley National Laboratory. Her research is in actinide coordination and organometallic chemistry. She spent a term at the White House Office of Science and Technology Policy, and is a Fellow of the American Chemical Society. She was awarded the American Chemical Society Garvan–Olin Medal in 2021.
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