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Your search keyword '"Noreland, J."' showing total 25 results
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25 results on '"Noreland, J."'

1. Momentum Distribution Spectroscopy Using Deep Inelastic Neutron Scattering

Author

Reiter, G. F., Mayers, J., and Noreland, J.

Subjects
Condensed Matter
Abstract

We show that deep inelastic neutron scattering from hydrogen(or other light nuclei) can be used to measure a spectrum of anharmonic contributions to the target atom momentum distribution with high and known accuracy . The method is applied here to determine the momentum distribution of the hydrogen in the hydrogen bonded system KHC2O4(potassium binoxalate), where 13 anharmonic coefficients are obtained at the 2-sigma to 3-sigma level. The momentum distribution is obtained to an accuracy of better than few percent at all significant values of momentum.

Published
1999

8. Proton dynamics in the hydrogen bond in KHC2O4 as studied by inelastic neutron scattering

Author

Delaplane, RG, Noreland, J, Kuppers, H, Tomkinson, J, Delaplane, RG, Noreland, J, Kuppers, H, and Tomkinson, J

Abstract

We have measured the INS spectra of a powder sample and three differently oriented single crystals of KHC2O4 on the TFXA spectrometer at the ISIS facility. The results well characterise the hydrogen bond in this system by separately showing features domin, Addresses: Delaplane RG, UPPSALA UNIV, STUDSVIK NEUTRON RES LAB, S-61182 NYKOPING, SWEDEN. RUTHERFORD APPLETON LAB, CHILTON OX10 9BH, ENGLAND. CHRISTIAN ALBRECHTS UNIV KIEL, MINERAL PETROG INST, KIEL, GERMANY.

Published
1997

23. 2,3;7,8-Bis(ethylenedioxy)thianthrene-hexafluoroarsenate [(bEDOT)AsF6]: A Mott-Hubbard Insulator Showing Evidence for Appreciable Correlation Effects

Author

Söderholm, S., Noreland, J., Olovsson, G., Olovsson, I., Hellberg, J., and Engman, L.

Abstract

The structure, electrical, optical and magnetic properties of the title compound are reported. The stacks of anions and cations are segregated. The cation stack is dimerized and the bEDOT molecules are tilted; the angle relative to the stacking axis is 48°. (bEDOT)AsF6 is semiconducting with σ(300 K) = 2 · 10-8 (Ωcm)-1 and the energy gap is about 1 eV. The optical absorption measurements give evidence for appreciable correlation effects. The on-site and the nearest-neighbor Coulomb repulsions are estimated to 1.5 and 0.6 eV, respectively, and the effective transfer integral to 0.2 eV. The observed ESR signal originates from defect/impurities present in a concentration of 4 · 1018 spins/mole.

Published
1989
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