Zobrazeno 1 - 10 of 82 pro vyhledávání: '"B. T. M. Willis"'
1
Elektronická kniha
Experimental Neutron Scattering
Autor: B. T. M. Willis, C. J. Carlile
The first systematic experiments in neutron scattering were carried out in the late 1940s using fission reactors built for the nuclear power programme. Crystallographers were amongst the first to exploit the new technique, but they were soon followed
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2
Some Achievements in Neutron Crystallography
Autor: B. T. M. Willis
Publikováno v: Acta Crystallographica Section A Foundations of Crystallography. 54:914-921
In this article, some results are described in a few areas of crystallography in which the methods of neutron scattering have played a major role. Four areas are selected: the determination of magnetic structures, high-resolution powder diffraction,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7019406ab97c74efdf42902a004e4ae8
https://doi.org/10.1107/s0108767398005418
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3
Thermal Diffuse Scattering in Angular-Dispersive Neutron Diffraction
Autor: N. C. Popa, B. T. M. Willis
Publikováno v: Acta Crystallographica Section A Foundations of Crystallography. 54:1006-1013
The theoretical treatment of one-phonon thermal diffuse scattering (TDS) in single-crystal neutron diffraction at fixed incident wavelength is reanalysed in the light of the analysis given by Popa & Willis [Acta Cryst. (1994), A50, 57–63; Acta Crys
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::af73574361faffdcb344783d649eb598
https://doi.org/10.1107/s0108767398006539
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4
Correction for Thermal Diffuse Scattering in Time-of-Flight NeutronDiffraction
Autor: B. T. M. Willis, N. C. Popa
Publikováno v: Acta Crystallographica Section A Foundations of Crystallography. 53:537-545
A fast numerical algorithm is presented for calculating the TDS correction to Bragg peaks recorded in time-of-flight neutron diffraction studies on single crystals. The algorithm allows two average sound velocities, together with the structural param
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0391b6477f1fa1683ca24e85450782d6
https://doi.org/10.1107/s0108767397006004
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5
Cuboctahedral oxygen clusters in U3O7
Autor: R. M. Ibberson, B. T. M. Willis, L. Nowicki, F. Garrido
Publikováno v: Journal of Nuclear Materials. 322:87-89
When UO 2 is oxidised to U 3 O 7 , the positions in the crystal lattice of all the uranium atoms and of about 70% of the oxygen atoms are hardly affected. The remaining oxygen atoms occupy new sites which are located 310 pm along 〈1 1 0〉 vectors
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1213947048c93e4fa73e370902a0d1f1
https://doi.org/10.1016/s0022-3115(03)00318-0
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6
Crystallography with a pulsed neutron source
Autor: B. T. M. Willis
Publikováno v: Zeitschrift für Kristallographie - Crystalline Materials. 209:385-389
In the past decade pulsed-neutron sources have become firmly established as being complementary to reactor sources for work in crystallography. We describe some of the special advantages of pulsed-neutron crystallography, such as the presence of a hi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::78fd787f921bb490fe3e75e604dba119
https://doi.org/10.1524/zkri.1994.209.5.385
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8
Thermal diffuse scattering of X-rays and neutrons
Autor: B. T. M. Willis
Publikováno v: International Tables for Crystallography ISBN: 9781402082054
International Tables for Crystallography ISBN: 9780792365921
International Tables for Crystallography
Thermal motion of the atoms in a crystal leads to a reduction in the intensities of the Bragg reflections and to a diffuse distribution of non-Bragg scattering (known as thermal diffuse scattering) in the rest of reciprocal space. Thermal diffuse sca
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04e94827390c6ed73ff22614ee308d84
https://doi.org/10.1107/97809553602060000773
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9
The observation of phonons in barium fluoride by pulsed neutron diffraction
Autor: C. C. Wilson, D. A. Keen, B. T. M. Willis, C. J. Carlile
Publikováno v: Acta Crystallographica Section A Foundations of Crystallography. 48:826-829
Measurements of thermal diffuse scattering from a single crystal of barium fluoride made on the neutron time-of-flight Laue single-crystal diffractometer SXD are presented. These measurements are shown to confirm present theories on the nature of the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c38473294940398ae002478aef48c2e8
https://doi.org/10.1107/s0108767392004069
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10
The structure of cimetidine (C10H16N6S) solved from synchrotron-radiation X-ray powder diffraction data
Autor: D. J. Watkin, Anthony K. Cheetham, C. K. Prout, Angus P. Wilkinson, B. T. M. Willis, Robert J. Cernik
Publikováno v: Journal of Applied Crystallography. 24:222-226
The crystal structure of cimetidine (C10H16N6S) has been solved and refined from high-resolution synchrotron X-ray powder data collected on station 8.3 at Daresbury Laboratory. The structure is monoclinic, P21/n, Z = 4, a = 10.7029 (3), b = 18.8262 (
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e4ff01473f27d6ea6cd1c34e2cab618
https://doi.org/10.1107/s0021889890013486
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