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11.
Mund G Gabert AJ Batchelor RJ Britten JF Leznoff DB 《Chemical communications (Cambridge, England)》2002,(24):2990-2991
An unusual metal-ligand binding motif is found in dimeric cobalt(II) complexes coordinated by diamidoether ligands that bridge the metals in a 'serpentine' fashion through the ether donors of the ligand backbone rather than the amido groups. 相似文献
12.
S.F. Biagi M. Bourquin A.J. Britten R.M. Brown H. Burchhart A.A. Carter J.R. Carter Ch. Doré P. Extermann M. Gailloud C.N.P. Gee W.M. Gibson J.C. Gordon R.J. Gray P. Igo-Kemenes W.C. Louis T. Modis P. Mühlemann R. Weill 《Physics letters. [Part B]》1982,112(3):265-270
The α parameter for Ξ? → Λπ? decay has been determined to be αΞ?=?0.462 ± 0.015, from a sample of 1.5 × 105 events recorded in the CERN SPS hyperon beam. This value is 2.5 standard deviations higher than the current world average. 相似文献
13.
Tkaczyk S Tollefson K Tollestrup A Toyoda H Trischuk W de Troconiz JF Tseng J Turini N Ukegawa F Valls J Vejcik S Velev G Vidal R Vilar R Vologouev I Vucinic D Wagner RG Wagner RL Wahl J Wallace NB Walsh AM Wang C Wang CH Wang MJ Watanabe T Waters D 《Physical review letters》2000,84(6):1110-1115
We search for color singlet technirho and technipion production in p&pmacr; collisions at sqrt[s] = 1.8 TeV recorded with the Collider Detector at Fermilab. These exotic technimesons are present in a model of walking technicolor. The signatures studied are lepton plus two jets plus E(T) and multijet final states. No excess of events is seen in either final state. We set an upper limit on the technirho production cross section and exclude a region in the technipion mass versus technirho mass plane. 相似文献
14.
Toyoda H Trischuk W de Troconiz JF Tseng J Turini N Ukegawa F Vaiciulis T Valls J Vejcik S Velev G Vidal R Vilar R Volobouev I Vucinic D Wagner RG Wagner RL Wahl J Wallace NB Walsh AM Wang C Wang CH Wang MJ Watanabe T Waters D Watts T Webb R 《Physical review letters》2000,84(22):5043-5048
We report results from a study of events with a leading antiproton of beam momentum fraction 0.9057 GeV. Using the dijet events, we evaluate the diffractive structure function of the antiproton and compare it with expectations based on results obtained in diffractive deep inelastic scattering experiments at the DESY ep collider HERA. 相似文献
15.
Using the approach of Rulla (1996 SIAM J. Numer. Anal. 33, 68-87)for analysing the time discretization error and assuming moreregularity on the initial data, we improve on the error boundderived by Barrett and Blowey (1996 IMA J. Numer. Anal. 16,257-287) for a fully practical piecewise linear finite elementapproximation with a backward Euler time discretization of amodel for phase separation of a multi-component alloy. 相似文献
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S.F. Biagi M. Bourquin A.J. Britten R.M. Brown H. Burckhart A.A. Carter J.R. Carter Ch. Doré P. Extermann M. Gailloud C.N.P. Gee W.M. Gibson J.C. Gordon R.J. Gray P. Igo-Kemenes W.C. Louis T. Modis P. Mühlemann R. Weill 《Physics letters. [Part B]》1982,112(3):277-280
From a sample of 735 000 Ξ? decays, we have obtained a new upper limit for the branching ratio . The result is 1.9 × 10?5 at the 90% confidence level. 相似文献
19.
Cahill LS Chapman RP Britten JF Goward GR 《The journal of physical chemistry. B》2006,110(14):7171-7177
High-resolution solid-state (7)Li NMR was used to characterize the structure and dynamics of lithium ion transport in monoclinic Li(3)V(2)(PO(4))(3). Under fast magic-angle spinning (MAS) conditions (25 kHz), three resonances are clearly resolved and assigned to the three unique crystallographic sites. This assignment is based on the Fermi-contact delocalization interaction between the unpaired d-electrons at the vanadium centers and the lithium ions. One-dimensional variable-temperature NMR and two-dimensional exchange spectroscopy (EXSY) are used to probe Li mobility between the three sites. Very fast exchange, on the microsecond time scale, was observed for the Li hopping processes. Activation energies are determined and correlated to structural properties including interatomic Li distances and Li-O bottleneck sizes. 相似文献
20.
S. Neretina R. A. Hughes J. F. Britten N. V. Sochinskii J. S. Preston P. Mascher 《Applied Physics A: Materials Science & Processing》2009,96(2):429-433
The small lattice mismatch and sixfold symmetry offered by the (0001) planes of sapphire make it an ideal substrate candidate
for the deposition of (111) CdTe films. There, however, exists a wide disparity in film quality among various researchers
with both single crystal and highly twinned, multidomain films being reported. We have developed a pulsed laser deposition
process that enables us to deposit nearly single-domain (111) CdTe films exhibiting excellent surface morphology. Such films
are deposited on as-received sapphire substrates in vacuum conditions where oxygen is readily available. If, however, film
deposition is preceded by the deposition of a submonolayer of aluminum prior to film growth then a secondary CdTe domain emerges
with an in-plane orientation having a 180°-in-plane offset from the first domain. These multidomain films show poor crystallographic
and morphological properties, similar to what has been reported elsewhere. It is concluded that the singly terminated (0001)
sapphire substrates are a prerequisite for the deposition of high-quality (111) CdTe films. 相似文献