Arthur Marshall Stoneham, FRS (May 18, 1940 – February 18, 2011), known as Marshall Stoneham, was a British physicist

Physicist

A physicist is a scientist who studies or practices physics. Physicists study a wide range of physical phenomena in many branches of physics spanning all length scales: from sub-atomic particles of which all ordinary matter is made to the behavior of the material Universe as a whole...

 who worked for the United Kingdom Atomic Energy Authority

United Kingdom Atomic Energy Authority

The United Kingdom Atomic Energy Authority is a UK government research organisation responsible for the development of nuclear fusion power. It is an executive non-departmental public body of the Department for Business, Innovation and Skills and was formerly chaired by Lady Barbara Judge CBE...

, and from 1995 was Massey professor of physics at University College London

University College London

University College London is a public research university located in London, United Kingdom and the oldest and largest constituent college of the federal University of London...

. He was the author of several books that became influential within the field, including Theory of Defects in Solids (1975).

He was a fellow of the Institute of Physics

Institute of Physics

The Institute of Physics is a scientific charity devoted to increasing the practice, understanding and application of physics. It has a worldwide membership of around 40,000....

, the American Physical Society

American Physical Society

The American Physical Society is the world's second largest organization of physicists, behind the Deutsche Physikalische Gesellschaft. The Society publishes more than a dozen scientific journals, including the world renowned Physical Review and Physical Review Letters, and organizes more than 20...

, and the Royal Society

Royal Society

The Royal Society of London for Improving Natural Knowledge, known simply as the Royal Society, is a learned society for science, and is possibly the oldest such society in existence. Founded in November 1660, it was granted a Royal Charter by King Charles II as the "Royal Society of London"...

, and in 2006 was awarded the Guthrie Medal and Prize

Guthrie Medal and Prize

The Faraday Medal and Prize is a prize awarded annually by the Institute of Physics. The prize is awarded for "outstanding contributions to experimental physics, to a physicist of international reputation in any sector."...

 of the Institute of Physics. Stoneham was elected President of the Institute of Physics in 2010 and died during his term in office.

Stoneham obtained his B.Sc. in physics from Bristol University in 1961, and his Ph.D. in 1964.