Val Logsdon Fitch

In 1949, Val Fitch married Elise Cunningham, a secretary who worked in the laboratory at Columbia. They had two sons. Elise died in 1972.

He remarried Daisy Harper Sharp in 1976. He had two stepdaughters and a stepson from Daisy’s earlier marriage.

He died at his home in Princeton, New Jersey, at the age of 91 on February 5, 2015.

Fitch was born on 10th March 1923 on a cattle ranch in Cherry County, Nebraska. He had an older brother and a sister. His birth place was very close to the reserve area made for Sioux Indians.

His father, Fred Fitch had acquired a big ranch at the age of 20 while his mother, Frances Logsdon was a local school teacher. Fred could speak language of Sioux Indians and was made honorary chief of Sioux Indians.

When Val was very young, his father fell from a horse and got badly injured. Fred had to give up the physically strenuous activity associated with running a ranch and raising cattle. The family moved to Gordon, Nebraska, a town about 25 miles away, where Fred entered the insurance business.

Val completed high school in the public schools of Gordon in 1940. After high school he attended Chadron State College.

During the World War II, he entered the US Army as a soldier. This was a turning point in his life. After he had completed basic training, the Army sent him to Carnegie Institute of Technology for training under the Army Specialized Training Program. He was sent to Los Alamos, New Mexico, to work on the Manhattan Project.

While working in his office, Val came across a paper by John Wheeler devoted to µ-mesic atoms. This paper emphasized, in the case of the heavier nuclei, the extreme sensitivity of the Is level to the size of the nucleus. Even though the radiation from these atoms had never been observed, these atomic systems might be a good thesis topic.

This was the time when few technical developments had taken place simultaneously. The first one: The Columbia University had successfully developed Nevis cyclotron. The beams of (pi)-measons from the cyclotron contained an admixture of µ-measons which came from the decay of the (pi)'s and which could be separated by range. The second one: Scientist Hofstadter had developed excellent scintillation counter and energy spectrometer for gamma rays thallium activation of Sodium iodide. The Third one was the development of new phototubes just being produced by RCA which were suitable matches to sodium iodide crystals to convert the scintillations to electrical signals.

Val, using the above developments and his Los Alamos experience, designed and built a gamma-ray spectrometer including a multichannel pulse height analyzer.

The net result of all the effort for his thesis was the pioneering work on µ-mesic atoms. They found out that the nucleus was substantially smaller than had been deduced from other effects. While the µ-mesic atom measurements give the rms radius of the nucleus with extreme accuracy the electron scattering results have the advantage of yielding many moments to the charge distribution. He completed his Ph.D. in 1954, writing his thesis on ‘Studies of X-rays from µ-mesonic atoms.

After obtaining PhD, his interest shifted to the strange particles and K mesons. He took a position at Princeton University where he spent the next 20 years studying K-mesons. These efforts and discovery of CP-violation was recognized by the Nobel Foundation in 1980.

Val conducted much of his research at the Brookhaven National Laboratory, where he became acquainted with James Cronin. Cronin had built a new kind of detector, a spark chamber spectrometer, and he realized that it would be perfect for experiments with K mesons. Along with two colleagues, James Christenson and René Turlay, they set up their experiment on the Alternating Gradient Synchrotron at Brookhaven. They discovered an unexpected result. The importance of this result was not immediately appreciated but as evidence of the Big Bang Theory accumulated, Andrei Sakharov realized in 1967 that it explained why the universe is largely made of matter and not antimatter. Put simply, they had found "the answer to the physicist’s 'Why do we exist? For this discovery, Fitch and Cronin received the 1980 Nobel Prize in Physics.