| Issue |
EPJ Web Conf.
Volume 272, 2022
QENS/WINS 2022 – 15th Edition of the QENS Series and 10th of the WINS Workshops
|
|
|---|---|---|
| Article Number | 02005 | |
| Number of page(s) | 5 | |
| Section | WINS | |
| DOI | https://doi.org/10.1051/epjconf/202227202005 | |
| Published online | 17 November 2022 | |
https://doi.org/10.1051/epjconf/202227202005
The correction of Inelastic Neutron Scattering data of organic samples using the Average Functional Group Approximation
Physics Department and NAST Centre, Università degli Studi di Roma “Tor Vergata”, Via della Ricerca, Scientifica 1, 00133, Roma, Italy
* e-mail: giovanni.romanelli@uniroma2.it
Published online: 17 November 2022
The use of the Average Functional Group Approximation for self-shielding corrections at inelastic neutron spectrometers is discussed. By taking triptindane as a case study, we use the above-mentioned approximation to simulate a synthetic dynamic structure factor as measured on an indirect-geometry spectrometer, as well as the related total scattering cross section as a function of incident neutron energy and sample temperature, and the transmission spectra depending on the sample thickness. These quantities, obtained in a consistent way from the Average Functional Group Approximation, are used to calculate the energy-dependent self-shielding correction affecting the sample under investigation. The impact on the intensities of low-energy vibrational modes is discussed, showing that at typical experimental conditions the sample-dependent attenuation factor is about 15% higher compared to the correction at higher energies.
© The Authors, published by EDP Sciences, 2022
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