ArticleProceedings of the National Academy of Sciences of the United States of America2017
The role of momentum transfer during incoherent neutron scattering is explained by the energy landscape model.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- Time domain versus energy domain neutron scattering analysis of protein dynamics.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Reply to Doster: Franck-Condon and Van Hove formulation of quasielastic neutron scattering from complex systems.Proceedings of the National Academy of Sciences of the United States of America · 2019Article
- Franck-Condon picture of incoherent neutron scattering.Proceedings of the National Academy of Sciences of the United States of America · 2018Article
- No case against scattering theory.Proceedings of the National Academy of Sciences of the United States of America · 2017Article
- Reply to Wuttke: Our reinterpretation of QENS does not violate scattering theory.Proceedings of the National Academy of Sciences of the United States of America · 2017Article
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3 authors.
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Abstract
We recently introduced a model of incoherent quasielastic neutron scattering (QENS) that treats the neutrons as wave packets of finite length and the protein as a random walker in the free energy landscape. We call the model ELM for "energy landscape model." In ELM, the interaction of the wave packet with a proton in a protein provides the dynamic information. During the scattering event, the momentum [Formula: see text] is transferred by the wave packet to the struck proton and its moiety, exerting the force [Formula: see text] The resultant energy [Formula: see text] is stored elastically and returned to the neutron as it exits. The energy is given by [Formula: see text], where [Formula: see text] is the ambient temperature and [Formula: see text] ([Formula: see text] 91 K Å) is a new elastobaric coefficient. Experiments yield the scattering intensity (dynamic structure factor) [Formula: see text] as a function of [Formula: see text] and [Formula: see text] To test our model, we use published data on proteins where only thermal vibrations are active. ELM competes with the currently accepted theory, here called the spatial motion model (SMM), which explains [Formula: see text] by motions in real space. ELM is superior to SMM: It can explain the experimental angular and temperature dependence, whereas SMM cannot do so.
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