Product Code Database
The femtometre (American spelling femtometer), symbol fm, (derived from the Danish language and Norwegian word femten 'fifteen', ) is a unit of length in the International System of Units (SI) equal to 10−15 , which means a quadrillionth of one metre. This distance is sometimes called a fermi and was so named in honour of Italian naturalized to American physicist Enrico Fermi, as it is a typical length-scale of nuclear physics.
femtometres = 1 [[millimetre]].
For example, the charge radius of a proton is approximately 0.841 femtometres while the radius of a gold Atomic nucleus is approximately 8.45 femtometres.Blatt, John M.; Weisskopf, Victor F. (1952), Theoretical Nuclear Physics, New York: Wiley, pp. 14–16.
1 barn = 100 fm2
The fermi is named after the Italy physicist Enrico Fermi (1901–1954), one of the founders of nuclear physics. The term was coined by Robert Hofstadter in a 1956 paper published in Reviews of Modern Physics entitled "Electron Scattering and Nuclear Structure". Hofstadter, Robert, Department of Physics, Stanford University, Stanford, California, "Electron Scattering and Nuclear Structure," Rev. Mod. Phys. 28, 214–254 (1956) The American Physical Society The term is widely used by nuclear and particle physics 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). Hofstadter, Robert, "The electron-scattering method and its application to the structure of nuclei and nucleons," Nobel Lecture (December 11, 1961)
|
|
