Louis Harold Gray

Louis Harold Gray
Louis Harold Gray
	LH Gray (left) and J Boag supervising construction of the Gray Laboratory at Mount Vernon Hospital in north London.
Born	10 November 1905; Richmond upon Thames, England
Died	9 July 1965 (aged 59); Northwood, London
Education	The Latymer School; Christ's Hospital; Trinity College, Cambridge;
Known for	Bragg–Gray cavity theory; Gray (unit)
Spouse	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)

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 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.

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