Myrtle Claire Bachelder (March 13, 1908 – May 22, 1997) was an American chemist and
Women's Army Corps
The Women's Army Corps (WAC) was the women's branch of the United States Army. It was created as an Auxiliaries, auxiliary unit, the Women's Army Auxiliary Corps (WAAC) on 15 May 1942 and converted to an active duty status in the Army of the U ...
officer, who is noted for her secret work on the
Manhattan Project
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project w ...
atomic bomb program, and for the development of techniques in the chemistry of metals.
Early life and career
Myrtle Claire Bachelder was born on March 13, 1908, in
Worcester, Massachusetts
Worcester ( , ) is a city and county seat of Worcester County, Massachusetts, United States. Named after Worcester, England, the city's population was 206,518 at the 2020 United States census, 2020 census, making it the second-List of cities i ...
. She earned a
Bachelor of Science
A Bachelor of Science (BS, BSc, SB, or ScB; from the Latin ') is a bachelor's degree awarded for programs that generally last three to five years.
The first university to admit a student to the degree of Bachelor of Science was the University of ...
degree from
Middlebury College
Middlebury College is a private liberal arts college in Middlebury, Vermont. Founded in 1800 by Congregationalists, Middlebury was the first operating college or university in Vermont. The college currently enrolls 2,858 undergraduates from all ...
in 1930, and became a high school science teacher and athletics coach in
South Hadley Falls, Massachusetts. She received her master of education degree from
Boston University
Boston University (BU) is a private research university in Boston, Massachusetts. The university is nonsectarian, but has a historical affiliation with the United Methodist Church. It was founded in 1839 by Methodists with its original campu ...
.
World War II: the atomic bomb
During
World War II
World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
, Bachelder enlisted in the
Women's Army Corps
The Women's Army Corps (WAC) was the women's branch of the United States Army. It was created as an Auxiliaries, auxiliary unit, the Women's Army Auxiliary Corps (WAAC) on 15 May 1942 and converted to an active duty status in the Army of the U ...
(WAC) in November 1942, at the
Springfield, Massachusetts
Springfield is a city in the Commonwealth of Massachusetts, United States, and the seat of Hampden County. Springfield sits on the eastern bank of the Connecticut River near its confluence with three rivers: the western Westfield River, the ...
headquarters. After spending time in training at military bases in several U.S. states, she received orders assigning her to the Company 'D' WAC Detachment of the
Manhattan District
The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project w ...
,
. Her secret assignment was to lead a group of 15 to 20 women from the WAC, stationed in
Des Moines, Iowa
Des Moines () is the capital and the most populous city in the U.S. state of Iowa. It is also the county seat of Polk County. A small part of the city extends into Warren County. It was incorporated on September 22, 1851, as Fort Des Moines, ...
, to
Fort Sill, Oklahoma
Fort Sill is a United States Army post north of Lawton, Oklahoma, about 85 miles (136.8 km) southwest of Oklahoma City. It covers almost .
The fort was first built during the Indian Wars. It is designated as a National Historic Landmark ...
, and from there to
Santa Fe, New Mexico
Santa Fe ( ; , Spanish for 'Holy Faith'; tew, Oghá P'o'oge, Tewa for 'white shell water place'; tiw, Hulp'ó'ona, label=Tiwa language, Northern Tiwa; nv, Yootó, Navajo for 'bead + water place') is the capital of the U.S. state of New Mexico. ...
. She and the women under her command arrived at
Los Alamos, New Mexico
Los Alamos is an census-designated place in Los Alamos County, New Mexico, United States, that is recognized as the development and creation place of the atomic bomb—the primary objective of the Manhattan Project by Los Alamos National Labora ...
on October 21, 1943. Bachelder however reported to one more woman named Helen E. Mulvihill. Bachelder and the other women lived in a dorm that is now a historical landmark.
"Manhattan" was the code name for the special military division dedicated to developing an atomic weapon. In
the clandestine laboratory at the remote Los Alamos desert site, Bachelder was responsible for the analysis of the
spectroscopy
Spectroscopy is the field of study that measures and interprets the electromagnetic spectra that result from the interaction between electromagnetic radiation and matter as a function of the wavelength or frequency of the radiation. Matter wa ...
of
uranium isotopes
Uranium (92U) is a naturally occurring radioactive element that has no stable isotope. It has two primordial isotopes, uranium-238 and uranium-235, that have long half-lives and are found in appreciable quantity in the Earth's crust. The decay ...
and discovering techniques for x-radiation. Since the
uranium-235
Uranium-235 (235U or U-235) is an isotope of uranium making up about 0.72% of natural uranium. Unlike the predominant isotope uranium-238, it is fissile, i.e., it can sustain a nuclear chain reaction. It is the only fissile isotope that exis ...
isotope is
fissile
In nuclear engineering, fissile material is material capable of sustaining a nuclear fission chain reaction. By definition, fissile material can sustain a chain reaction with neutrons of thermal energy. The predominant neutron energy may be typ ...
, whereas the
uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature, with a relative abundance of 99%. Unlike uranium-235, it is non-fissile, which means it cannot sustain a chain reaction in a thermal-neutron reactor. However, it ...
isotope is not, her role in the project was a crucial task: to ensure the purity of the sub-critical material, and therefore the
nuclear explosion
A nuclear explosion is an explosion that occurs as a result of the rapid release of energy from a high-speed nuclear reaction. The driving reaction may be nuclear fission or nuclear fusion or a multi-stage cascading combination of the two, t ...
, of the world's first atomic bombs.
![bachelder1946](https://upload.wikimedia.org/wikipedia/commons/6/68/Bachelder1946.jpg)
These methods were used during the preparation of
plutonium-239
Plutonium-239 (239Pu or Pu-239) is an isotope of plutonium. Plutonium-239 is the primary fissile isotope used for the production of nuclear weapons, although uranium-235 is also used for that purpose. Plutonium-239 is also one of the three main ...
, the fissile material used in the construction of the atomic bomb for the
Trinity nuclear test
Trinity was the code name of the first detonation of a nuclear weapon. It was conducted by the United States Army at 5:29 a.m. on July 16, 1945, as part of the Manhattan Project. The test was conducted in the Jornada del Muerto desert abo ...
, on July 16, 1945. Analogous methods were used for the uranium weapon, code-named "
Little Boy
"Little Boy" was the type of atomic bomb dropped on the Japanese city of Hiroshima on 6 August 1945 during World War II, making it the first nuclear weapon used in warfare. The bomb was dropped by the Boeing B-29 Superfortress ''Enola Gay'' p ...
", which destroyed
Hiroshima
is the capital of Hiroshima Prefecture in Japan. , the city had an estimated population of 1,199,391. The gross domestic product (GDP) in Greater Hiroshima, Hiroshima Urban Employment Area, was US$61.3 billion as of 2010. Kazumi Matsui h ...
, Japan on August 6, 1945, and for the plutonium bomb which
destroyed Nagasaki, Japan on August 9, 1945, leading to the
Japanese surrender
The surrender of the Empire of Japan in World War II was announced by Emperor Hirohito on 15 August and formally signed on 2 September 1945, bringing the war's hostilities to a close. By the end of July 1945, the Imperial Japanese Navy ...
.
The secret program was under the general direction of
J. Robert Oppenheimer
J. Robert Oppenheimer (; April 22, 1904 – February 18, 1967) was an American theoretical physicist. A professor of physics at the University of California, Berkeley, Oppenheimer was the wartime head of the Los Alamos Laboratory and is oft ...
, whom Bachelder described as:
Contribution to post-war developments in nuclear energy
The conclusion of the Second World War was also the dawning of a new "Atomic Age", in which the peacetime potential of nuclear energy began to be explored. Bachelder was among the scientists who opposed the May-Johnson Bill of October 1945, a Congressional bill proposed by the
Interim Committee, which would have maintained military control over nuclear research. The bill was defeated in Congress and superseded by the
McMahon Atomic Energy Act. In January 1947, the newly formed
Atomic Energy Commission approved the declassification of 270 previously secret documents. These included discoveries related to
X-radiation
An X-ray, or, much less commonly, X-radiation, is a penetrating form of high-energy electromagnetic radiation. Most X-rays have a wavelength ranging from 10 picometers to 10 nanometers, corresponding to frequencies in the range 30  ...
and purification of
uranium ore
Uranium ore deposits are economically recoverable concentrations of uranium within the Earth's crust. Uranium is one of the more common elements in the Earth's crust, being 40 times more common than silver and 500 times more common than gold. It ...
s, which had been made by Bachelder during the course of the war effort. At this time, the rarity and importance of Bachelder's achievements as a
woman in science were also acknowledged.
Scientific research and later career
After leaving the Army, Bachelder became a research chemist at the
University of Chicago
The University of Chicago (UChicago, Chicago, U of C, or UChi) is a private research university in Chicago, Illinois. Its main campus is located in Chicago's Hyde Park neighborhood. The University of Chicago is consistently ranked among the b ...
, where the first self-sustaining nuclear reaction had been achieved in 1942.
Nobel Laureate
The Nobel Prizes ( sv, Nobelpriset, no, Nobelprisen) are awarded annually by the Royal Swedish Academy of Sciences, the Swedish Academy, the Karolinska Institutet, and the Norwegian Nobel Committee to individuals and organizations who make out ...
James Franck
James Franck (; 26 August 1882 – 21 May 1964) was a German physicist who won the 1925 Nobel Prize for Physics with Gustav Hertz "for their discovery of the laws governing the impact of an electron upon an atom". He completed his doctorate i ...
had been Director of the Chemistry Division of the
Metallurgical Laboratory during the earlier phases of the Manhattan Project. Bachelder joined the University's Institute for the Study of Metals (renamed as the
James Franck Institute
The James Franck Institute of the University of Chicago conducts interdisciplinary research in physics, chemistry and materials science. Scientists at the institute include those interested in condensed matter physics, physical chemistry, material ...
in 1967), and she conducted further research in metallochemistry.
Among other achievements, Bachelder developed methods for the purification of the rare elements
tellurium
Tellurium is a chemical element with the symbol Te and atomic number 52. It is a brittle, mildly toxic, rare, silver-white metalloid. Tellurium is chemically related to selenium and sulfur, all three of which are chalcogens. It is occasionally fou ...
and
indium
Indium is a chemical element with the symbol In and atomic number 49. Indium is the softest metal that is not an alkali metal. It is a silvery-white metal that resembles tin in appearance. It is a post-transition metal that makes up 0.21 parts p ...
.
Other aspects of her broad scientific expertise found application in the field of
marine archaeology
Maritime archaeology (also known as marine archaeology) is a discipline within archaeology as a whole that specifically studies human interaction with the sea, lakes and rivers through the study of associated physical remains, be they vessels, s ...
, when she determined the chemical composition of brass cannons found in the
Aegean Sea
The Aegean Sea ; tr, Ege Denizi (Greek language, Greek: Αιγαίο Πέλαγος: "Egéo Pélagos", Turkish language, Turkish: "Ege Denizi" or "Adalar Denizi") is an elongated embayment of the Mediterranean Sea between Europe and Asia. It ...
on sunken ships.
She also made contributions to
astrochemistry
Astrochemistry is the study of the abundance and reactions of molecules in the Universe, and their interaction with radiation. The discipline is an overlap of astronomy and chemistry. The word "astrochemistry" may be applied to both the Solar Syst ...
, when
NASA
The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research.
NASA was established in 1958, succeeding t ...
asked her to analyze the chemistry of
Moon rock
Moon rock or lunar rock is rock originating from Earth's Moon. This includes lunar material collected during the course of human exploration of the Moon, and rock that has been ejected naturally from the Moon's surface and landed on Earth as ...
s which had been collected from the Moon's surface during the
Apollo missions
The Apollo program was a United States human spaceflight program carried out from 1961 to 1972 by the National Aeronautics and Space Administration (NASA), which landed the first astronauts on the Moon. The program used the Saturn IB and Saturn ...
from 1969 to 1972.
Bachelder retired from the Franck Institute in 1973, and was subsequently active as an official of the
American Association of Retired Persons
AARP (formerly called the American Association of Retired Persons) is an interest group in the United States focusing on issues affecting those over the age of fifty. The organization said it had more than 38 million members in 2018. The magazi ...
(AARP).
She died in Chicago on May 22, 1997.
Reflections
Bachelder believed that her role in the development of the atomic bomb, and the subsequent use of atomic weapons against Japan, had been justified in order to end the Second World War and to avoid greater loss of life that would have been entailed in a U.S. land invasion and extended conflict with Japan. Later, during the period of the
Strategic Arms Limitation Talks
The Strategic Arms Limitation Talks (SALT) were two rounds of bilateral conferences and corresponding international treaties involving the United States and the Soviet Union. The Cold War superpowers dealt with arms control in two rounds of ta ...
, Bachelder stated that, although she supported nuclear arms control:
During Bachelder's life she always made time for her voracious reading habits.
"She made the most of each day. She, too, knew the importance of working hard, ignoring the clock, and always challenging herself."
Notes
References
*
*
{{DEFAULTSORT:Bachelder, Myrtle
1908 births
1997 deaths
20th-century American women scientists
20th-century American chemists
AARP people
American women chemists
20th-century American educators
Boston University School of Education alumni
Manhattan Project people
Middlebury College alumni
Scientists from Chicago
People from Orange, Massachusetts
United States Army officers
University of Chicago faculty
Nuclear weapons scientists and engineers
Women's Army Corps soldiers
Rare earth scientists
United States Army personnel of World War II
American women academics
Women on the Manhattan Project
Military personnel from Illinois
Military personnel from Massachusetts