Myrtle Bachelder

Myrtle Bachelder
Born	March 13, 1908 Orange, Massachusetts
Died	May 22, 1997(1997-05-22) (aged 89) Chicago, Illinois
Nationality	United States
Fields	metallurgy radiochemistry
Institutions	University of Chicago, Los Alamos National Laboratory
Known for	Chemistry of uranium and rare earth elements

Myrtle Bachelder
Military service
Service/branch	United States Army
Years of service	1942–1946
Rank	Captain, WAC
Battles/wars	World War II

Myrtle Claire Bachelder (March 13, 1908 - May 22, 1997) was an American chemist and Women's Army Corps officer, who is noted for her secret work on the Manhattan Project atomic bomb program, and for the development of techniques in the chemistry of metals.

Early life and career

Bachelder was born in 1908 in Orange, Massachusetts. She attained her bachelor of science degree from Middlebury College in 1930. She then was a high school science teacher, and athletic coach, at South Hadley Falls, Massachusetts. The subjects taught by Bachelder included physics, chemistry, and biology. She attained her master of science degree from Boston University, in 1939.

World War II: the atomic bomb

Bachelder enlisted in the Women's Army Corps (WAC) in November 1942, at the Springfield, Massachusetts headquarters.^[1] 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 Corps of Engineers. Her secret assignment was to lead a group of 15 to 20 women from the WAC, stationed in Des Moines, Iowa, to Fort Sill, Oklahoma, and from there to New Mexico.^[2] She and the women under her command arrived at Los Alamos, New Mexico in October of 1943.

"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 of uranium isotopes.

Bachelder (center) at Los Alamos in 1946, with Capt. Arlene Scheidenhelm, Director of WAC, and 1st Lt. Marguerite Carrera, Commanding Officer, Manhattan District.

Since the U-235 isotope can sustain a fission chain reaction, whereas the U-238 isotope cannot, Bachelder's role in the project was a crucial task: to ensure the purity of the sub-critical material, and therefore the nuclear explosion, of the world's first atomic bombs.

These methods were used during the preparation of plutonium-239, the fissile material used in the construction of the atomic bomb for the Trinity nuclear test, on July 16, 1945. Analogous methods were used for the uranium weapon, code-named "Little Boy", which destroyed Hiroshima, Japan on August 6, 1945, and for the plutonium bomb which destroyed Nagasaki, Japan on August 9, 1945, leading to the Japanese surrender. The secret program was under the general direction of J. Robert Oppenheimer, whom Bachelder described as:

A 'pencil and paper man', immersed in physics theory, who was more than a little amazed by the Los Alamos lab machinery. Bachelder recalled Oppenheimer standing in front of her lab's most important and expensive instrument punching buttons at random... He asked "What does this do?" Then he'd punch another button... 'He might have wrecked the machine if he hadn't finally been persuaded to leave it alone'.^[3]

Contribution to post-war developments in nuclear energy

Nuclear Energy, the sculpture commemorating the Manhattan Project site at the University of Chicago.

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 and purification of uranium ores, 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.^[4]

Scientific research and later career

After leaving the Army, Bachelder became a research chemist at the University of Chicago, where the first self-sustaining nuclear reaction had been achieved in 1942. Nobel Laureate James Franck 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 in 1967), and she conducted further research in metallochemistry.^[5][6][7]

Among other achievements, Bachelder developed methods for the purification of the rare elements tellurium and indium. Other aspects of her broad scientific expertise found application in the field of marine archaeology, when she determined the chemical composition of brass cannons found in the Aegean Sea on sunken ships. She also made contributions to astrochemistry, when NASA asked her to analyze the chemistry of rocks which had been collected from the Moon's surface during the Apollo Missions of 1969 - 1972.^[8]

Bachelder retired from the Franck Institute in 1973, and was subsequently active as an official of the American Association of Retired Persons (AARP).^[9]

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 in life, during the period of the Strategic Arms Limitation Talks, Bachelder stated that, although she supported nuclear arms control:

Opponents of nuclear weapons should resist the urge to take the 1940's bomb-building effort out of its proper historical context - 'One cannot pull that activity out of that time, set it down in the 1980's, and pass judgement.'

^[10]

References

1. ^ Iris Y. Bell, Los Alamos WAACs/WACs: World War II, 1943-1946. Coastal Printing Inc, Sarasota, 1993.
2. ^ Ruth H. Howes, Caroline L. Herzenber, Their Day in the Sun: Women of the Manhattan Project. Temple University Press, 2003
3. ^ "Los Alamos Aide Recalls Dawn of Atomic Age". Brett Staples, Chicago Sun-Times, November 19, 1984.
4. ^ "Atomic Boiler Hints Now Off Secret List, Women Among Authors". Howard W. Blakeslee, Associated Press, January 31, 1947.
5. ^ M C. Bachelder, P M. Sparrow: Determination of Antimony in Indium Antimonide. Anal. Chem., 1957, 29 (1), pp 149–150, January 1957
6. ^ M. C. Bachelder: Effect of Constituent Materials upon Spectrographic Measurement of Seven Impurity Elements. Anal. Chem., 1949, 21 (11), pp 1366–1369, November 1949
7. ^ Myrtle C. Bachelder: A diagnostic test on the mastery of chemical calculations. J. Chem. Educ., 1948, 25 (4), p 217, April 1948
8. ^ R.D. Bachiler, Bachiler-Bachelder genealogy, 2003.
9. ^ Myrtle Bachelder. Chicago Tribune, May 26, 1997.
10. ^ "Los Alamos Aide Recalls Dawn of Atomic Age". Brett Staples, Chicago Sun-Times, November 19, 1984.

Further Reading

• Iris Y. Bell, Los Alamos WAACs/WACs: World War II, 1943-1946. Coastal Printing, Sarasota, 1993.
• Ruth H. Howes, Caroline L. Herzenber, Their Day in the Sun: Women of the Manhattan Project. Temple University, 2003.