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Louis Harold Gray

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Name
  
Louis Gray

Role
  
Physicist

Notable awards
  
Royal Society


Louis Harold Gray wwwenhertstrnhsukfiles201306halgrayweb2

Born
  
10 November 1905 Richmond upon Thames, England (
1905-11-10
)

Known for
  
Bragg–Gray cavity theory Gray (unit)

Author abbrev. (botany)
  
The standard author abbreviation L.H.Gray is used to indicate this individual as the author when citing a botanical name.

Died
  
July 9, 1965, London Borough of Hillingdon, United Kingdom

Education
  
Trinity College, Cambridge

Louis Harold Gray | Wikipedia audio article


Louis Harold Gray (10 November 1905 – 9 July 1965) was an English physicist who worked mainly on the effects of radiation on biological systems, inventing the field of radiobiology as he went. A summary of his work is given below. Amongst many other achievements, he defined a unit of radiation dosage which was later named after him as an SI unit, the gray.

Contents

Career

  • 1933 - Hospital physicist at Mount Vernon Hospital, London
  • 1936 - Developed the Bragg-Gray equation, the basis for the cavity ionization method of measuring gamma-ray energy absorption by materials
  • 1937 - Built an early neutron generator at Mount Vernon Hospital
  • 1938 - Studied biological effects of neutrons using the generator
  • 1940 - Developed concept of RBE (Relative Biological Effectiveness) of doses of neutrons
  • 1952 - Initiated research into cells in hypoxic tumors and hyperbaric oxygen
  • 1953 - Established the Gray Laboratory at Mount Vernon Hospital
  • 1953 - 1960 - Under Gray's direction, Jack W. Boag developed pulse radiolysis
  • 1962 - Ed Hart, of Argonne National Laboratory, and Jack Boag discovered the hydrated electron using pulse radiolysis at the Gray Laboratory - This discovery initiated a new direction of research that is still very active today and is vital for understanding the effects of radiation on biological tissue, for instance in cancer treatment.

    • References

    Louis Harold Gray Wikipedia
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