Journal Article

FZJ-2026-03896

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A small-angle scattering model for broad correlation peaks and small diffuse scattering

Frielinghaus, H. (Corresponding author)FZJ*

2026
Munksgaard Copenhagen

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Please use a persistent id in citations: doi:10.1107/S1600576726006825  doi:10.34734/FZJ-2026-03896

Abstract: Porous and/or bicontinuous structures often display a pronounced correlation peak in their small-angle scattering that indicates a preferred domain spacing $d$. A first attempt to describe the full $q$-dependence of small-angle scattering profiles has been formulated in a previous publication [Frielinghaus (2026) J. Appl. Cryst. 59, 837–844]. However, the diffuse scattering, i.e.\ the forward scattering, is often found to be lower than in this simple framework, while the correlation peak is rather broad. By adding one more parameter $\sigma$ that stretches the correlation peak with respect to the residual features of the theory a more general, heuristic theoretical framework for porous and/or bicontinuous structures is obtained. The predominant conditions and their physical meaning are discussed in context with practical examples.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd) ; Materials Science (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. JCNS-4 (JCNS-4)
3. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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