Louis Harold Gray facts for kids

Quick facts for kids Louis Harold Gray
LH Gray (left) and J Boag supervising construction of the Gray Laboratory at Mount Vernon Hospital in north London.
Born	(1905-11-10)10 November 1905 Richmond upon Thames, England
Died	9 July 1965(1965-07-09) (aged 59) Northwood, London
Education	The Latymer School Christ's Hospital Trinity College, Cambridge
Known for	Bragg–Gray cavity theory Gray (unit)
Spouse(s)	Frieda Marjorie Picot
Parents	Harry Gray (father) Amy Bowen (mother)
Awards	Roentgen Award Sylvanus Thompson Medal Barclay Medal Katherine Berkan Judd Award Bertner Foundation Award Fellow of the Royal Society
Scientific career
Institutions	Cavendish Laboratory Fellow of Trinity College Medical Research Council's Radiotherapeutic Research Unit at Hammersmith Hospital
Thesis	(1930)
Doctoral advisor	James Chadwick
Author abbrev. (botany)	This author is usually abbreviated L.H.Gray when citing a botanical name.

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

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 British Empire Cancer Campaign Research Unit in Radiobiology at Mount Vernon Hospital which in 1970 became the Cancer Research Campaign’s Gray Laboratory and then (in 2001) the Gray Cancer Institute.
• 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.

See also

In Spanish: Louis Harold Gray para niños