Parameters of the NERA spectrometer for cold and thermal moderators of the IBR-2 pulsed reactor

Natkaniec, I.; Chudoba, Dorota; Hetmańczyk, Łukasz; Kazimirov, V. Yu.; Krawczyk, J.; Sashin, I. L.; Zalewski, Sławomir

doi:10.1088/1742-6596/554/1/012002

Cited by 33 publications

(21 citation statements)

References 6 publications

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“…Generally, IINS TOF spectra are transformed in ω-depending spectra F(ω) according to eq 4 and following one of the standard treatment procedures such as described in ref 12 and used in the current study. However, as shown above, the scattering from heavy atoms can be excluded from the total spectra at the experimental level.…”

Section: Resultsmentioning

confidence: 99%

“…The neutron scattering study was performed using the inverted-geometry time-of-flight (TOF) spectrometer NERA, set at the high-flux pulsed IBR-2 reactor of Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research. 12 The investigated samples are illuminated by white neutron beam, which is analyzed with the TOF method over the 110 m long flight path from the IBR-2 moderator to the sample position. The NERA spectrometer allows for simultaneous collection of neutron powder diffraction (NPD) and inelastic neutron scattering (INS) spectra.…”

Section: Methods In Usementioning

confidence: 99%

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Computationally Supported Neutron Scattering Study of Parent and Chemically Reduced Graphene Oxide

et al. 2015

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Synthetic graphene oxide (GO) as well as the product of its reducing performed in the regime of hydrogenolysis (rGO) were studied by both elastic and inelastic neutron scattering at low and room temperature conditions. The neutron diffraction patterns were analyzed to confirm stacking structures of both species consisting of 2−3 and ∼7 layers of microsize lateral dimension and the interlayer distances of 7 and 3.5 Å, respectively. The inelastic incoherent neutron scattering spectra were analyzed in the frame of the computationally supported one-phonon amplitude-weighted density of vibrational states G(ω) approximation. Calculations of G(ω) spectra were performed in the framework of semilocal density functional theory. The computational models were adjusted to the atom mass content of both GO and rGO species. The presented study has revealed the retained water in the freshly made GO, corresponding to the relatively low humidity, which further reacts with the oxygen-containing groups at the GO basal planes. The reaction results in the formation of hydroxyls chemically bound to the GO core in the course of the prolong storage of the product under ambient conditions. The analysis of the rGO G(ω) spectrum has disclosed the chemical composition of its circumference attributing the latter to sets of CH units with a minor presence of atomic oxygen.

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Section: Resultsmentioning

confidence: 99%

Section: Methods In Usementioning

confidence: 99%

Computationally Supported Neutron Scattering Study of Parent and Chemically Reduced Graphene Oxide

et al. 2015

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“…The neutron scattering study was performed at the high flux pulsed IBR-2 reactor of the Frank Laboratory of Neutron Physics at the Joint Institute for Nuclear Research by using the inverted-geometry spectrometer NERA [14]. The investigated samples were illuminated by a white neutron beam analyzed by time-of-flight method on the 110 m flight path from the IBR-2 moderator to the sample.…”

Section: Neutron Scattering Experimentsmentioning

confidence: 99%

Neutron scattering from graphene oxide paper and thermally exfoliated reduced graphene oxide

Sheka¹,

Natkaniec²,

Melnikov³

et al. 2015

Nanosist.: fiz. him. mat.

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Synthetic graphene oxide, in the form of graphene oxide paper (GOpp), and its reduction product -thermally exfoliated reduced graphene oxide (TErGO) -were studied by elastic and inelastic neutron scattering at low and room temperature conditions. The neutron diffraction patterns were analyzed to confirm stacking structures of both species consisting of 4 -6 and ∼ 8 layers of microsize lateral dimension and the interlayer distances of 7.21Å and 3.36Å, respectively. The one-phonon hydrogen amplitude-weighted density of vibrational states G(ω) represents the inelastic incoherent neutron scattering spectra of the products. The study has revealed the retained water in the freshly made GOpp, corresponding to the lowest humidity. The analysis of the TErGO G(ω) spectrum has disclosed the chemical composition of its circumference attributing the latter to sets of CH units with a minor presence of atomic oxygen.

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“…Both studies were performed using the inverted-geometry time-of-flight (TOF) spectrometer NERA [8] at the high flux pulsed IBR-2 reactor of the Frank Laboratory of Neutron Physics at the Joint Institute for Nuclear Research. Figure 1 shows a typical picture of the NPD patterns related to the GO and rGO samples.…”

Section: Introductionmentioning

confidence: 99%

Parent and reduced graphene oxide of different origin in light of neutron scattering

Sheka¹,

Natkaniec²,

Rozhkova³

et al. 2016

Nanosystems: Phys. Chem. Math.

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The current paper presents results from an extended neutron scattering study of a three-part set of parent and reduced graphene oxides (GO and rGO, respectively) of different origins. The first part concerns the rGO of natural origin represented by shungite carbon, the second and third parts are related to synthetic GO/rGO pairs with the latter produced during either chemical treatment or via thermal exfoliation of the parent GO, respectively. The study involved both the neutron diffraction and inelastic neutron scattering. The one-phonon amplitude-weighted density of vibrational states G(ω) represents the inelastic incoherent neutron scattering spectra of the products. Common characteristics and individual distinctions of the studied species are discussed.

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Parameters of the NERA spectrometer for cold and thermal moderators of the IBR-2 pulsed reactor

Cited by 33 publications

References 6 publications

Computationally Supported Neutron Scattering Study of Parent and Chemically Reduced Graphene Oxide

Computationally Supported Neutron Scattering Study of Parent and Chemically Reduced Graphene Oxide

Neutron scattering from graphene oxide paper and thermally exfoliated reduced graphene oxide

Parent and reduced graphene oxide of different origin in light of neutron scattering

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