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101.
102.
103.
P. Marage M. Aderholz P. Allport N. Armenise J. P. Baton M. Berggren D. Bertrand V. Brisson F. W. Bullock W. Burkot M. Calicchio E. F. Clayton T. Coghen A. M. Cooper-Sarkar O. Erriquez P. J. Fitch J. Guy F. Hamisi P. O. Hulth G. T. Jones P. Kasper U. F. Katz H. Klein E. Matsinos R. P. Middleton D. B. Miller M. M. Mobayyen D. R. O. Morrison M. Neveu S. W. O'Neale M. A. Parker P. Petiau J. Sacton R. A. Sansum N. Schmitz E. Simopoulou C. Vallée K. Varvell A. Vayaki W. Venus H. Wachsmuth J. Wells W. Wittek BEBC WA Collaboration 《Zeitschrift fur Physik C Particles and Fields》1987,35(3):275-282
Coherent production ofρ ? mesons in charged current antineutrino interactions on neon nuclei is studied in the BEBC bubble chamber exposed to the CERN SPS wide band beam. The cross section is measured to be (95±25)·10?40 cm2 per neon nucleus, averaged over the beam energy spectrum. The distributions of kinematical variables and the absolute value of the cross section are in agreement with theoretical predictions based on the CVC hypothesis and the vector meson dominance model. 相似文献
104.
D. C. Bassett B. A. Khalifa R. H. Olley 《Journal of Polymer Science.Polymer Physics》1977,15(6):995-1009
Chain extensions above 1000 Å have been measured in two independent ways for various linear polyethylenes which had either been annealed in or crystallized into the high-pressure hexagonal phase. The distributions of fold-stem lengths measured from fracture-surface statistics and by gel permeation chromatography (GPC) molecular weight analysis of nitrated polymer agree reasonably well both in shape and position. Thinner lamellas, contributing to separate low melting peaks are, however, generally not recorded in fracture surfaces. The best agreement between the two measures, in their averages and overall distributions, is when the GPC weight distribution is compared with the number fracture-surface histogram. This is explicable in terms of the details of nitration. 相似文献
105.
P. J. Fitch P. Kasper A. M. Cooper-Sarkar M. Aderholz N. Armenise T. Azemoon D. Bertrand M. Berggren F. W. Bullock M. Calicchio E. F. Clayton T. Coghen O. Erriquez G. Gerbier J. Guy P. O. Hulth G. Iaselli G. T. Jones M. Lagraa P. Marage R. P. Middleton D. Miller M. M. Mobayyen M. Neveu S. W. O'Neale M. A. Parker R. A. Sansum E. Simopoulou K. Varvell C. Vallée A. Vayaki W. Venus H. Wachsmuth W. Wittek J. Wells E. Zevgolatakos BEBC WA Collaboration 《Zeitschrift fur Physik C Particles and Fields》1986,31(1):51-58
Evidence for a significant higher twist contribution to highz π? production in antineutrino scattering is presented. In events withW>3 GeV andQ 2>1 GeV2 in our data, it accounts for (51 ±8)% of all π? withz above 0.5. It is consistent with thez?Q 2 correlations of Berger's higher twist prediction. The data are inconclusive concerning the predictedy?z correlation andp T dependence. Thez ?Q 2 correlation is not adequately described by the Lund Monte-Carlo. 相似文献
106.
Colleen M. Costelloe John E. Madewell Vikas Kundra Robyn K. Harrell Roland L. Bassett Jr. Jingfei Ma 《Magnetic resonance imaging》2013
Purpose
The purpose of the study was to evaluate the conspicuity of bone metastases on each of the numerous sequences produced by fast Dixon-based multisequence whole-body (WB) magnetic resonance imaging (MRI) scanning in order to determine the most clinically useful sequences overall and per anatomic region.Materials and Methods
Twenty-seven breast cancer patients with bone metastases were prospectively studied with fast Dixon-based WB MRI including head/neck, chest, abdominal, pelvic, thigh, calf/feet and either cervical, thoracic and lumbar or cervical/thoracic and thoracic/lumbar regions. Sequences included coronal T2, axial T1 without and with intravenous gadolinium (+ C), sagittal T1 spine + C, each associated fat-only (FO) and fat-saturated (FS) sequence, axial diffusion-weighted imaging (DWI) and short tau inversion recovery (STIR). Blinded reviewers evaluated lesion conspicuity, a surrogate of clinical utility, on a five-point scale per anatomic region. Sequences were compared using analysis of variance, differences were detected with Tukey's honestly significant difference test, and the four sequences with highest mean conspicuity were compared to the remainder overall and per anatomic region.Results
Overall, a significant lesion conspicuity difference was found (P < .0001), and lesion conspicuity was significantly higher on FS T1 + C, FO T1 + C, T1 + C sagittal and FS T1 + C axial sequences (P < .0001). Per-region results were the same in the head/neck. Other sequences overlapped with these and included the following: chest/abdomen — FO T2, DWI; pelvis — DWI, FO T2; thigh — FS T2, FO T2, FO T1 + C; calf/feet — FS T2, DWI, FO T2, STIR.Conclusion
Overall, bone lesions were most conspicuous on FS T1 + C sagittal, FO T1 + C sagittal, T1 + C sagittal and FS T1 + C axial fast Dixon WB MRI sequences. 相似文献107.
William A. Bassett 《高压研究》2013,33(2):163-186
The year 2008 marked the fiftieth birthday of the diamond anvil cell. Its birth took place when Alvin Van Valkenburg, while working with his colleagues, Charles E. Weir, Ellis R. Lippincott, and Elmer N. Bunting, first realized that he could look right through one of the diamond anvils and see a sample while it was at high pressure. In the following years, these scientists and many others adapted the diamond anvil cell to a wide variety of analytical techniques that have provided an impressive amount of information about materials at high pressures and high temperatures. But, virtually all of those techniques start with looking into the diamond anvil cell. 相似文献
108.
R. Albrecht T. C. Awes C. Baktash P. Beckmann F. Berger R. Bock G. Claesson G. Clewing L. Dragon A. Eklund R. L. Ferguson A. Franz S. Garpman R. Glasow H. ?. Gustafsson H. H. Gutbrod J. Idh P. Jacobs K. H. Kampert B. W. Kolb P. Kristiansson I. Y. Lee H. L?hner I. Lund F. E. Obenshain A. Oskarsson I. Otterlund T. Peitzmann S. Persson F. Plasil A. M. Poskanzer M. Purschke H. G. Ritter S. Saini R. Santo H. R. Schmidt T. Siemiarczuk S. P. Sorenseh E. Stenlund M. Tincknell G. R. Young WA -Collaboration 《Zeitschrift fur Physik C Particles and Fields》1990,45(4):529-537
Charged pion yields and transverse energies of baryons are measured for the reaction16O+Cu, Ag, Au at 60 and 200A GeV bombarding energy in the target fragmentation region employing the Plastic Ball detector. Only little dependence of the measured quantities on the bombarding energy is found. The data are compared with the multi-chain fragmentation model of Ranft. As a result it turns out that a leading order formation zone cascade is not sufficient to explain the baryon yield and the transverse energies of baryons in the target fragmentation region. 相似文献
109.
Experimental results are reported on the nonlinear interaction of a 0.5 μm laser light with long scalelength preformed plasmas. Spectra from stimulated Brillouin and Raman scattering, as well as measurements of the transmitted laser light clearly indicate the occurence of strong nonlinearities driven by filamentation of the laser beam. 相似文献
110.
M. Bonesini E. Bonvin P. S. L. Boóth D. Bortoletto L. J. Carroll A. J. Cass D. Cavalli G. Costa M. Donnat P. A. Dorsaz D. N. Edwards J. R. Fischer L. Fluri D. Frame F. Gianotti S. Jack J. N. Jackson M. Kelly M. N. Kienzle-Focacci R. Lucock J. G. Lynch L. Mandelli M. Martin L. Mathys A. Maxwell M. Mazzanti J. J. Myerscough P. J. Negus S. Pensotti-Rancoita L. Perini D. Perrin G. Polesello W. H. Range L. Rosselet S. W. Snow M. Tamborini A. S. Thompson R. M. Turnbull J. Wells M. Werlen WA -Collaboration 《Zeitschrift fur Physik C Particles and Fields》1988,37(4):535-544
The inclusive cross sections for prompt photon production by π? and π+ on protons have been measured with a beam momentum of 280 GeV/c using a fine grained electromagnetic calorimeter and the CERN Omega spectrometer. The transverse momentum and Feynmanx F ranges covered are 4.0<p T <7.0GeV/c and ?0.45<x F <0.55 respectively. A quantitative comparison of the prompt photon cross section with next-to-leading order QCD predictions using Duke and Owens structure functions is performed. 相似文献