A generalized mean-squared displacement from inelastic fixed window scans of incoherent neutron scattering as a model-free indicator of anomalous diffusion confinement
(2015) 11th International Conference on Quasielastic Neutron Scattering, QENS 2014 and 6th International Workshop on Inelastic Neutron Spectrometers, WINS 2014 In EPJ Web of Conferences 83.- Abstract
Elastic fixed window scans of incoherent neutron scattering are an established and frequently employed method to study dynamical changes, usually over a broad temperature range or during a process such as a conformational change in the sample. In particular, the apparent mean-squared displacement can be extracted via a model-free analysis based on a solid physical interpretation as an effective amplitude of molecular motions. Here, we provide a new account of elastic and inelastic fixed window scans, defining a generalized mean-squared displacement for all fixed energy transfers. We show that this generalized mean-squared displacement in principle contains all information on the real mean-square displacement accessible in the... (More)
Elastic fixed window scans of incoherent neutron scattering are an established and frequently employed method to study dynamical changes, usually over a broad temperature range or during a process such as a conformational change in the sample. In particular, the apparent mean-squared displacement can be extracted via a model-free analysis based on a solid physical interpretation as an effective amplitude of molecular motions. Here, we provide a new account of elastic and inelastic fixed window scans, defining a generalized mean-squared displacement for all fixed energy transfers. We show that this generalized mean-squared displacement in principle contains all information on the real mean-square displacement accessible in the instrumental time window. The derived formula provides a clear understanding of the effects of instrumental resolution on the apparent mean-squared displacement. Finally, we show that the generalized mean-square displacement can be used as a model-free indicator on confinement effects within the instrumental time window.
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- author
- Roosen-Runge, Felix LU and Seydel, Tilo
- publishing date
- 2015-01-01
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- host publication
- 11th International Conference on Quasielastic Neutron Scattering, QENS 2014 and 6th International Workshop on Inelastic Neutron Spectrometers, WINS 2014
- series title
- EPJ Web of Conferences
- volume
- 83
- article number
- 02015
- publisher
- EDP Sciences
- conference name
- 11th International Conference on Quasielastic Neutron Scattering, QENS 2014 and 6th International Workshop on Inelastic Neutron Spectrometers, WINS 2014
- conference location
- Autrans, France
- conference dates
- 2014-05-11 - 2014-05-16
- external identifiers
-
- scopus:84921774963
- ISSN
- 2101-6275
- DOI
- 10.1051/epjconf/20158302015
- language
- English
- LU publication?
- no
- id
- 1e26b60d-0854-46a5-b81a-a5f40f986274
- date added to LUP
- 2018-12-17 09:42:28
- date last changed
- 2022-04-18 05:41:48
@inproceedings{1e26b60d-0854-46a5-b81a-a5f40f986274,
abstract = {{<p>Elastic fixed window scans of incoherent neutron scattering are an established and frequently employed method to study dynamical changes, usually over a broad temperature range or during a process such as a conformational change in the sample. In particular, the apparent mean-squared displacement can be extracted via a model-free analysis based on a solid physical interpretation as an effective amplitude of molecular motions. Here, we provide a new account of elastic and inelastic fixed window scans, defining a generalized mean-squared displacement for all fixed energy transfers. We show that this generalized mean-squared displacement in principle contains all information on the real mean-square displacement accessible in the instrumental time window. The derived formula provides a clear understanding of the effects of instrumental resolution on the apparent mean-squared displacement. Finally, we show that the generalized mean-square displacement can be used as a model-free indicator on confinement effects within the instrumental time window.</p>}},
author = {{Roosen-Runge, Felix and Seydel, Tilo}},
booktitle = {{11th International Conference on Quasielastic Neutron Scattering, QENS 2014 and 6th International Workshop on Inelastic Neutron Spectrometers, WINS 2014}},
issn = {{2101-6275}},
language = {{eng}},
month = {{01}},
publisher = {{EDP Sciences}},
series = {{EPJ Web of Conferences}},
title = {{A generalized mean-squared displacement from inelastic fixed window scans of incoherent neutron scattering as a model-free indicator of anomalous diffusion confinement}},
url = {{http://dx.doi.org/10.1051/epjconf/20158302015}},
doi = {{10.1051/epjconf/20158302015}},
volume = {{83}},
year = {{2015}},
}