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Quasielastic neutron scattering (QENS) designates a limiting case of inelastic neutron scattering, characterized by energy transfers being small compared to the incident energy of the scattered particles. The term quasielastic scattering was originally coined in nuclear physics. It was applied to thermal neutron scattering since the early 1960s, notably in an article by Leon van Hove〔L. Van Hove and K. W. McVoy, ''Pair distribution functions and scattering phenomena'', Nucl. Phys. 33, 468-476 (1962).〕 and in a highly cited one by Pierre Gilles de Gennes.〔P.G. de Gennes, ''Collective motions of hydrogen bonds'', Solid State Comm. 1, 132-137 (1963).〕 QENS is typically investigated on high-resolution spectrometers (neutron backscattering, neutron time-of-flight, neutron spin-echo). It is used to investigate topics like * solid-state diffusion (e.g. hydrogen in metals) * slow modes in crystals (e.g. methyl group rotation) * relaxation of viscous liquids == Conference Series == Starting in 1992, there is a conference series entitled QENS: 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Quasielastic neutron scattering」の詳細全文を読む スポンサード リンク
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