Donald Cooksey (May 15, 1892 – August 19, 1977), was a son of George Cooksey from Birmingham, England and Linda Dows from New York.
After High School at the Thacher School in California, Donald Cooksey followed his brother Charlton Cooksey (a physics professor at Yale) and attended Yale and where he too became a physicist specializing in designing and building scientific instruments, especially detectors for measuring sub-atomic particles such as neutrons. When Ernest O. Lawrence was at Yale during the 1920s, Cooksey and Lawrence became friends. In 1932, after Lawrence had moved to Berkeley, California to set up the Radiation Laboratory there, Lawrence asked Cooksey to come to Berkeley to make detectors for use with Lawrence's cyclotrons. Cooksey continued to be a close associate of Lawrence and became associate director of the Lawrence Radiation Laboratory of the University of California at Berkeley.
Donald Cooksey and his wife Milicent Sperry had a son Donald Dows Cooksey (born in 1944) and a daughter Helen Sperry Cooksey(born 1947) who became a surgeon.
- McMillan, Edwin M. (December 1977). "Donald Cooksey". Physics Today 30 (12): 69–70. Bibcode:1977PhT....30l..69M. doi:10.1063/1.3037839.
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