Zobrazeno 1 - 10
of 81
pro vyhledávání: '"Philip J. Bray"'
Autor:
Philip J. Bray
Publikováno v:
Inorganica Chimica Acta. 289:158-173
Nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) have both been used to study boron in crystalline borates and glasses containing boron oxide (B2O3). Both boron nuclear isotopes, 10B and 11B, have magnetic moments and electrica
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e89c34cbc94b37c615c44b1981740832
https://doi.org/10.1016/s0020-1693(99)00066-3
https://doi.org/10.1016/s0020-1693(99)00066-3
Publikováno v:
Journal of Physics: Condensed Matter. 11:4435-4450
Boron NMR and NQR studies have been performed on three icosahedral borides: - and -rhombohedral boron and boron carbide (B12C3). Two 11B NMR peaks, separated by significant chemical shifts in the range from 130 ppm to 280 ppm, were clearly observed f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea492f46390b0af658719981c94b44d8
https://doi.org/10.1088/0953-8984/11/22/314
https://doi.org/10.1088/0953-8984/11/22/314
Autor:
Philip J. Bray, Gary L. Petersen
Publikováno v:
Zeitschrift für Naturforschung A. 53:273-284
Nuclear magnetic resonance (NMR) has been used for some 40 years to study atomic arrangements, chemical bonding, and structural groupings in borate glasses and crystalline compounds, and nuclear quadrupole resonance (NQR) has more recently increased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::296766aea3d89ab235900ee17fc50d4c
https://doi.org/10.1515/zna-1998-6-704
https://doi.org/10.1515/zna-1998-6-704
Autor:
Philip J. Bray, J.F. Emerson
Publikováno v:
Journal of Non-Crystalline Solids. 169:87-95
29Si, 23Na and 133Cs 7.05 T NMR studies of sodium-cesium mixed-alkali silicate glasses are reported. The fractional contribution to the spectral intensity of the various Qn units and the values of the chemical shift tensors for each of the 29Si sites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dfcc545aa6a100ada2700187d6d5314
https://doi.org/10.1016/0022-3093(94)90227-5
https://doi.org/10.1016/0022-3093(94)90227-5
Publikováno v:
Zeitschrift für Naturforschung A. 49:65-70
A new pulsed nuclear quadrupole resonance spectrometer is described and a number of Nitrogen-14 spectra are shown and discussed. The spectrometer is computer interfaced and both data acquisition and all adjustments other than the matching network tun
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eeccd513c7904817c58568ca6ff3bd7
https://doi.org/10.1515/zna-1994-1-212
https://doi.org/10.1515/zna-1994-1-212
Autor:
Philip J. Bray, Gary L. Petersen
Publikováno v:
ChemInform. 29
Nuclear magnetic resonance (NMR) has been used for some 40 years to study atomic arrangements, chemical bonding, and structural groupings in borate glasses and crystalline compounds, and nuclear quadrupole resonance (NQR) has more recently increased
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11b19903fc92ee0cc9497e109a5ba426
https://doi.org/10.1002/chin.199840279
https://doi.org/10.1002/chin.199840279
Publikováno v:
Solid State Nuclear Magnetic Resonance. 1:227-230
A simple circuit has been designed to generate a bi-symmetric square wave Zeeman modulation for the detection of nuclear quadrupole resonance. The square waveform not only provides an optimum result among bi-symmetric modulation waveforms, but also a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d277e64882d9eea628c1db33c1a2ad29
https://doi.org/10.1016/s0926-2040(10)80008-6
https://doi.org/10.1016/s0926-2040(10)80008-6
Autor:
D. A. Feil, Dong-Hoon Lee, D. Bain, De Gen Mao, Philip J. Bray, Ponnappa Pandikuthira, Steve Feller, Gary L. Petersen, Sumit Nijhawan
Publikováno v:
Zeitschrift für Naturforschung A. 47:30-38
Pure nuclear quadrupole resonance (NQR) spectroscopy at low frequencies (down to 275 kHz) has been used to investigate a number of borate, aluminate, and vanadate crystalline compounds and borate glasses. The values of the quadrupole coupling constan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dbf841cdb411a700bff7cae99b0b827
https://doi.org/10.1515/zna-1992-1-208
https://doi.org/10.1515/zna-1992-1-208
Autor:
Degen Mao, Philip J. Bray
Publikováno v:
Journal of Non-Crystalline Solids. 144:217-223
11 B NQR and NMR studies of crystalline lead diborate (PbO·2B 2 O 3 ) and lead borate glasses have been performed at liquid nitrogen temperature (77 K). Two NQR lines were detected at 406.7 and 482.5 kHz PbO·2B 2 O 3 , indicating two distinct types
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::285284cfaab2dc3a5209832a29e5db7e
https://doi.org/10.1016/s0022-3093(05)80403-x
https://doi.org/10.1016/s0022-3093(05)80403-x
Autor:
Philip J. Bray, Dong-Hoon Lee
Publikováno v:
Journal of Magnetic Resonance (1969). 94:51-58
27 Al NQR responses have been obtained from the three different forms of crystalline Al 2 SiO 5 , andalusite, kyanite, and sillimanite, by a very sensitive Robinson-type continuous wave NQR spectrometer at 77 K or at room temperature. From the NQR re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::015b0d21d564afda75315bfb6bfec0be
https://doi.org/10.1016/0022-2364(91)90293-3
https://doi.org/10.1016/0022-2364(91)90293-3