https://doi.org/10.1051/epjconf/202328604006
The high-Q static scattering of 3-methyl pyridine/D2O mixtures without and with antagonistic salt
1 Forschungszentrum Jülich GmbH, Jülich Center for Neutron Scattering JCNS-4 at MLZ, Lichtenbergstrasse 1, 85747 Garching, Germany
2 Korea Atomic Energy Research Institute, 111, Daedeok-daero 989 beon-gil, Yuseong-gu, Daejeon, 34057, Republic of Korea
3 Neutron Sciences Directorate, Oak Ridge National Laboratory (ORNL), POB 2008, 1 Bethel Valley Road, Oak Ridge, TN 37831, USA
4 Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA
* e-mail: h.frielinghaus@fz-juelich.de
Published online: 9 October 2023
Here we focus on the high-Q small-angle neutron scattering where we observed deviations from an ideal power law Q−2. From theory, this deviation Δ arises from the critical correlation-function exponent ηd in d dimensions. The investigated systems were 3-methyl pyridine/D2O without and with antagonistitc salt. They display the critical behavior of a 3d and 2d Ising system, respectively. In the first case, the value of Δ matches the ideal value η3 well, but in the latter case the value of Δ is affected by the two confined dimensions and the third dimension.
© The Authors, published by EDP Sciences, 2023
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