Results 21 to 30 of about 12,151 (297)

QED Theory of the Nuclear Magnetic Shielding in Hydrogenlike Ions [PDF]

open access: yesPhysical Review Letters, 2011
The shielding of the nuclear magnetic moment by the bound electron in hydrogen-like ions is calculated ab initio with inclusion of relativistic, nuclear, and quantum electrodynamics (QED) effects. The QED correction is evaluated to all orders in the nuclear binding strength parameter and, independently, to the first order in the expansion in this ...
Yerokhin, V.   +3 more
openaire   +4 more sources

Study on the effect of neutron shielding design on tritium breeding based on water-cooled ceramic blanket for CFETR

open access: yesAIP Advances, 2023
The Chinese Fusion Engineering Test Reactor (CFETR) is a magnetic confinement fusion reactor independently designed and developed by China, which is based on the ITER design experience.
Jie Li   +7 more
doaj   +1 more source

Towards Elucidating Structure–Spectra Relationships in Rhamnogalacturonan II: Computational Protocols for Accurate 13C and 1H Shifts for Apiose and Its Borate Esters

open access: yesFrontiers in Molecular Biosciences, 2022
Apiose is a naturally occurring, uncommon branched-chain pentose found in plant cell walls as part of the complex polysaccharide Rhamnogalacturonan II (RG-II).
Vivek S. Bharadwaj   +2 more
doaj   +1 more source

Nuclear Magnetic Shieldings of Stacked Aromatic and Antiaromatic Molecules [PDF]

open access: yesJournal of Chemical Theory and Computation, 2017
Nuclear magnetic shieldings have been calculated at the density functional theory (DFT) level for stacks of benzene, hexadehydro[12]annulene, dodecadehydro[18]annulene, and hexabenzocoronene. The magnetic shieldings due to the ring currents in the adjacent molecules have been estimated by calculating nucleus independent molecular shieldings for the ...
Dage Sundholm   +6 more
openaire   +3 more sources

DFT STUDY OF THE TUBULAR SIZE EFFECTS ON THE PROPERTIES OF ZIGZAG BORON NITRIDE NANOTUBES

open access: yesStudia Universitatis Babes-Bolyai Chemia, 2017
Density functional theory (DFT) studies were performed on representative zigzag models of boron nitride nanotubes (BNNTs) with different structural sizes. To achieve minimized-energy structures and their properties, first, optimization calculations were
Fatemeh SHEKHOLIA LAVASANI   +2 more
doaj   +1 more source

Computational and Experimental 1H-NMR Study of Hydrated Mg-Based Minerals

open access: yesMolecules, 2020
Magnesium oxide (MgO) can convert to different magnesium-containing compounds depending on exposure and environmental conditions. Many MgO-based phases contain hydrated species allowing 1H-nuclear magnetic resonance (NMR) spectroscopy to be used in the ...
Eric G. Sorte   +2 more
doaj   +1 more source

Chemical shift tensors as probes of chalcogen bonds: solid-state NMR study of telluradiazole-XCN− (X = O, S, Se) salt cocrystals

open access: yesFACETS, 2023
We report experimental 125Te magic-angle spinning solid-state nuclear magnetic resonance (MAS NMR) measurements of the tellurium chemical shift (CS) tensors in three [K(18-crown-6)]+ 3,4-dicyano-1,2,5-telluradiazole-XCN− (X = O, S, Se) salt cocrystals ...
Carina Almario   +2 more
doaj   +1 more source

Magnetic moment of ^{207}Pb and the hyperfine splitting of ^{207}Pb^{81+}

open access: yesPhysical Review Research, 2020
We performed nuclear magnetic resonance measurements on lead(II) nitrate Pb(NO_{3})_{2} in aqueous solution and on the hexafluoridoplumbate(IV) [PbF_{6}]^{2−} ion in acetonitrile.
Verena Fella   +8 more
doaj   +1 more source

Embroidered Coils for Magnetic Resonance Sensors

open access: yes, 2013
Magnetic resonance imaging is a widely used technique for medical and materials imaging. Even though the objects being imaged are often irregularly shaped, suitable coils permitting the measurement of the radio-frequency signal in these systems are ...
Newton, Michael   +11 more
core   +1 more source

Failure Analysis and Shielding Effectiveness Study of Magnetic Components in Strong Magnetic Environments for Magnetic Confinement Fusion Devices

open access: yes南方能源建设
[Introduction] The purpose of this study is to explore the impact of the spatial magnetic field generated by nuclear fusion devices on magnetic devices and to gain an in-depth understanding of the magnetic field shielding characteristics in a complex ...
Ya HUANG, Zhengyi HUANG
doaj   +1 more source

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