Editing Robert Hofstadter (section)

==Opus==
===Thallium-activated sodium iodide gamma ray detector===
In 1948 Hofstadter filed a patent on this for the detection of [[ionizing radiation]] by this crystal.<ref>{{US patent reference|number=2585551|title=Means for detecting ionizing radiations|inventor=Robert Hofstadter}}</ref><ref>[http://www.nap.edu/openbook.php?record_id=10169&page=163 "Robert Hofstadter"] ''Biographical Memoirs'' National Academy of Sciences</ref> These [[scintillation counter#Detection materials|thallium-activated sodium iodide detectors]] are widely used for gamma ray detection to this day.

===Coining of the fermi (unit) and 1961 Nobel Lecture===

Robert Hofstadter coined the term [[fermi (unit)|fermi]], symbol '''fm''',<ref>{{cite journal
 | title = American National Standard for Metric Practice
 | series = IEEE/ASTM SI 10-2010 (Revision of IEEE/ASTM SI 10-2002) 
 | journal = IEEE Standards Library
 | pages = 78
 | publisher = IEEE
 | date = April 11, 2011
| url = https://ieeexplore.ieee.org/document/5750142
 | doi = 10.1109/IEEESTD.2011.5750142 
 | isbn = 978-0-7381-6533-2
 | access-date = February 18, 2014 
 }}</ref>
in honor of the Italian [[physicist]] [[Enrico Fermi]] (1901–1954), one of the founders of nuclear physics, in Hofstadter's 1956 paper published in the ''[[Reviews of Modern Physics]]'' journal, "Electron Scattering and Nuclear Structure".<ref>Hofstadter, Robert, department of physics, Stanford University, Stanford, California, [http://rmp.aps.org/abstract/RMP/v28/i3/p214_1 "Electron Scattering and Nuclear Structure"], ''Rev. Mod. Phys.'' 28, 214–254 (1956) © 1956 The American Physical Society</ref> The term is widely used by nuclear and [[particle physics|particle]] physicists. When Hofstadter was awarded the 1961 Nobel Prize in Physics, it subsequently appeared in the text of his 1961 Nobel Lecture, "The electron-scattering method and its application to the structure of nuclei and nucleons" (December 11, 1961).<ref name="Nobel"/>

===Compton Gamma Ray Observatory and EGRET Telescope===
In his last few years, Hofstadter became interested in [[astrophysics]] and applied his knowledge of [[scintillator]]s to the design of the [[Energetic Gamma Ray Experiment Telescope|EGRET]] [[gamma-ray telescope]] of the [[Compton Gamma Ray Observatory]] named for fellow Nobel Laureate in Physics (1927), [[Arthur Holly Compton]]. [[Stanford University]]'s Department of Physics credits Hofstadter with being "one of the principal scientists who developed the Compton Observatory."<ref>{{cite web|title=The Hofstadter Memorial Lectures|url=http://www.stanford.edu/dept/physics/events/hofstadter2004.html|publisher=Stanford University|access-date=December 7, 2013}}</ref>