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Darleane Christian Hoffman (born November 8, 1926) is an American nuclear chemist who was among the researchers who confirmed the existence of
seaborgium Seaborgium is a synthetic chemical element; it has symbol Sg and atomic number 106. It is named after the American nuclear chemist Glenn T. Seaborg. As a synthetic element, it can be created in a laboratory but is not found in nature. It is als ...
, element 106. She is a faculty senior scientist in the Nuclear Science Division of
Lawrence Berkeley National Laboratory Lawrence Berkeley National Laboratory (LBNL, Berkeley Lab) is a Federally funded research and development centers, federally funded research and development center in the Berkeley Hills, hills of Berkeley, California, United States. Established i ...
and a professor in the graduate school at
UC Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California), is a public land-grant research university in Berkeley, California, United States. Founded in 1868 and named after the Anglo-Irish philosopher George Berkele ...
. In acknowledgment of her many achievements, ''Discover'' magazine recognized her in 2002 as one of the 50 most important women in science.


Early life and education

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. 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 Iowa State University of Science and Technology (Iowa State University, Iowa State, or ISU) is a Public university, public land-grant university, land-grant research university in Ames, Iowa, United States. Founded in 1858 as the Iowa Agricult ...
), she took a required chemistry course taught by Nellie May Naylor, and decided to pursue further study in that field. She received her B. S. (1948) and Ph. D. (1951) degrees in chemistry (nuclear) from
Iowa State University Iowa State University of Science and Technology (Iowa State University, Iowa State, or ISU) is a Public university, public land-grant university, land-grant research university in Ames, Iowa, United States. Founded in 1858 as the Iowa Agricult ...
.


Career

Darleane C. Hoffman was a chemist at
Oak Ridge National Laboratory Oak Ridge National Laboratory (ORNL) is a federally funded research and development centers, federally funded research and development center in Oak Ridge, Tennessee, United States. Founded in 1943, the laboratory is sponsored by the United Sta ...
for a year and then joined her husband at the
Los Alamos Scientific Laboratory Los Alamos National Laboratory (often shortened as Los Alamos and LANL) is one of the sixteen research and development laboratories of the United States Department of Energy (DOE), located a short distance northwest of Santa Fe, New Mexico, in ...
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 chemistThe element that never was
by Kit Chapman, in ''
Chemistry World ''Chemistry World'' is a monthly chemistry news magazine published by the Royal Society of Chemistry. The magazine addresses current events in the world of chemistry including research, international business news and government policy as it affe ...
''; published June 10, 2019; retrieved November 23, 2022
—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. 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 Lawrence Berkeley National Laboratory (LBNL, Berkeley Lab) is a Federally funded research and development centers, federally funded research and development center in the Berkeley Hills, hills of Berkeley, California, United States. Established i ...
. Additionally, she helped found the Seaborg Institute for Transactinium Science at
Lawrence Livermore National Laboratory Lawrence Livermore National Laboratory (LLNL) is a Federally funded research and development centers, federally funded research and development center in Livermore, California, United States. Originally established in 1952, the laboratory now i ...
in 1991 and became its first director, serving until 1996 when she "retired" to become Senior Advisor and Charter Director. Over her career, Hoffman studied the chemical and nuclear properties of
transuranium element The transuranium (or transuranic) elements are the chemical elements with atomic number greater than 92, which is the atomic number of uranium. All of them are radioactively unstable and decay into other elements. Except for neptunium and pluton ...
s and confirmed the existence of
seaborgium Seaborgium is a synthetic chemical element; it has symbol Sg and atomic number 106. It is named after the American nuclear chemist Glenn T. Seaborg. As a synthetic element, it can be created in a laboratory but is not found in nature. It is als ...
.


Personal life

Right after finishing her doctoral work, Darleane Christian married Marvin M. Hoffman, a physicist. The Hoffmans had two children, Maureane Hoffman, M.D., Ph.D ( Duke Medical School) and Dr. Daryl Hoffman (plastic surgeon), both born at Los Alamos.


Awards and memberships

* 2023 – Enrico Fermi Presidential Award * 2014 – Los Alamos Medal *2000 –
Priestley Medal The Priestley Medal is the highest honor conferred by the American Chemical Society (ACS) and is awarded for distinguished service in the field of chemistry. Established in 1922, the award is named after Joseph Priestley, one of the discoverers of ...
, (only the second woman to win the Priestley, after Mary L. Good in 1997) * 1997 –
National Medal of Science The National Medal of Science is an honor bestowed by the President of the United States to individuals in science and engineering who have made important contributions to the advancement of knowledge in the fields of behavioral science, behavior ...
* 1990 – Garvan-Olin Medal * 1986 –
Fellow of the American Physical Society The American Physical Society honors members with the designation ''Fellow'' for having made significant accomplishments to the field of physics. The following lists are divided chronologically by the year of designation. * List of fellows of the ...
* 1983 – ACS Award for Nuclear Chemistry, and she was the first woman to win the award. * 1978 –
Guggenheim Fellowship Guggenheim Fellowships are Grant (money), grants that have been awarded annually since by the John Simon Guggenheim Memorial Foundation, endowed by the late Simon Guggenheim, Simon and Olga Hirsh Guggenheim. These awards are bestowed upon indiv ...
She is a member of the
Norwegian Academy of Science and Letters The Norwegian Academy of Science and Letters (, DNVA) is a learned society based in Oslo, Norway. Its purpose is to support the advancement of science and scholarship in Norway. History The Royal Frederick University in Christiania was establis ...
.


References


External links


Darleane Hoffman, Harold Johnston to Receive National Medal of Science
{{DEFAULTSORT:Hoffman, Darleane 1926 births Living people Iowa State University alumni 21st-century American chemists National Medal of Science laureates UC Berkeley College of Chemistry faculty Los Alamos National Laboratory personnel Recipients of the Garvan–Olin Medal Enrico Fermi Award recipients Members of the Norwegian Academy of Science and Letters American women chemists Fellows of the American Physical Society 21st-century American women scientists