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Arsenic-rich GaAs(0 0 1) surface structure

Vincent P. LaBella, Michael R. Krause, Zhao Ding, Paul M. Thibado
2005 Surface science reports  
This article discusses the past 40 years of research covering the equilibrium thermodynamic properties of the arsenic-rich GaAs(0 0 1) surface, which is the starting surface for producing the majority  ...  The interplay in surface-free-energy-reduction between reconstruction transformation and roughening is now well understood for the GaAs(0 0 1) surface and will be discussed.  ...  Fig. 15(b) ] which would have a feature spanning over 3 4 of the length of the ''4-by'' width.  ... 
doi:10.1016/j.surfrep.2005.10.001 fatcat:6ximzddxavbgdbulhc2u5wnzjm

Beyond the narrow resonance approximation: Decay constant and width of the first pion-excitation state

Victor Elias, Amir H. Fariborz, Mark A. Samuelf, Fang Shi, T.G. Steele
1997 Physics Letters B  
of the field-theoretical pseudoscalar Laplace sum rule to its hadronic (pion + pion-excitation + QCD-continuum) content.  ...  We obtain the following values (uncertainties reflect 90 1.15 ± 0.28 GeV, width Γ_Π = < 0.48 GeV, decay constant r ≡ [F_Π M_Π^2 / f_π m_π^2]^2 = 4.7 ± 2.8.  ...  The mass, width, and decay constant of the first pion excitation are of interest to effective theories of low energy QCD.  ... 
doi:10.1016/s0370-2693(97)01049-6 fatcat:zc2l5s6dcvdffmasbwugyl5uim

The Width of X-ray Spectrum Lines

Arthur H. Compton
1922 Physical Review  
Width of X-ray Spectrum Lines.  ...  The effect of the first two causes is independent of the angle of reflection and therefore the same for all orders and all lines; the effect of the third is shown to vary as i/sin 0 cos 6 and therefore  ...  The values calculated in the second row of Table I . result from the further approximation that d86d/d80 is constant for all values of 86d.  ... 
doi:10.1103/physrev.19.68 fatcat:2akwzrgynje5pkhqkz7mjmw7fu

Penumbral structure at 0$\farcs$1 resolution

L. H. M. Rouppe van der Voort, M. G. Löfdahl, D. Kiselman, G. B. Scharmer
2004 Astronomy and Astrophysics  
The penumbral power spectra do not show any signs of bumps or peaks that could correspond to a preferred scale at 0. 35 for the width of penumbral filaments.  ...  We find that there are still unresolved penumbral filaments which must have widths smaller than 80 km. The fine structuring along the filaments is limited.  ...  The Swedish 1-m Solar Telescope is operated on the island of La Palma by the Royal Swedish Academy of Sciences in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofísica de  ... 
doi:10.1051/0004-6361:20031611 fatcat:pkrmgeyj6nbrrhrd5uvxbwegou

Solar magnetic elements at 0 $\farcs$1 resolution

L. H. M. Rouppe van der Voort, V. H. Hansteen, M. Carlsson, A. Fossum, E. Marthinussen, M. J. van Noort, T. E. Berger
2005 Astronomy and Astrophysics  
At a resolution of 0. 1, new forms of magnetic structures are found in strong field areas: elongated "ribbons" and more circular "flowers".  ...  All these structures have darker inner parts and a bright edge. The plasma is found to be at rest in the ribbons, with small concentrations of weak upflow sites.  ...  The Swedish 1-m Solar Telescope is operated on the island of La Palma by the Institute for Solar Physics of the Royal Swedish Academy of Sciences in the Spanish Observatorio del Roque de los Muchachos  ... 
doi:10.1051/0004-6361:20042561 fatcat:g62kb56yazbhxiedapr4n4foh4

Simultaneous investigation of the T=1(Jπ=0+) and T=0(Jπ=9+) β decays in Br70

A. I. Morales, A. Algora, B. Rubio, K. Kaneko, S. Nishimura, P. Aguilera, S. E. A. Orrigo, F. Molina, G. de Angelis, F. Recchia, G. Kiss, V. H. Phong (+52 others)
2017 Physical Review C  
The T=0 (J^π=9^+) and T=1 (J^π=0^+) isomers have both been produced in in-flight fragmentation of ^78Kr with ratios of 41.6(8)% and 58.4(8)%, respectively.  ...  Based on this result, we provide a new value of the half-life for the J^π=0^+ ground state of ^70Br, t_1/2=78.42±0.51 ms, which is slightly more precise, and in excellent agreement, with the best measurement  ...  Part of the WAS3ABi was supported by the Rare Isotope Science Project, which is funded by the Ministry of Science, ICT and Future Planning (MSIP) and National Research Foundation (NRF) of Korea.  ... 
doi:10.1103/physrevc.95.064327 fatcat:aubgkkdptbc47mmgwex27rgpji

Radiative transitions between 0−+ and 1−− heavy quarkonia on the light front

Meijian Li, Yang Li, Pieter Maris, James P. Vary
2018 Physical Review D  
In addition, we apply the transverse current to calculate the decay constant of vector mesons where we obtain consistent results using either m_j=0 or m_j=1 light-front wavefunctions.  ...  This allows us to investigate the role of rotational symmetry by considering vector mesons with different magnetic projections (m_j=01).  ...  A portion of the computational resources were provided by the National Energy Research Scientific Computing Center (NERSC), which is supported by the US DOE Office of Science.  ... 
doi:10.1103/physrevd.98.034024 fatcat:r3uzzzhglvhgdlkobuidy6dl5a

Role of codeposited impurities during growth. I. Explaining distinctive experimental morphology on Cu(0 0 1)

Ajmi BH. Hamouda, Rajesh Sathiyanarayanan, Alberto Pimpinelli, T. L. Einstein
2011 Physical Review B  
To identify the responsible impurity atom, we compute the nearest-neighbor binding energies (E NN ) and terrace diffusion barriers (E d ) for several candidate impurity atoms on Cu(0 0 1) using DFT-based  ...  We discuss the role of impurities in nanostructuring of surfaces.  ...  Ernst and coworkers performed STM studies of homoepitaxial growth in the step-flow mode on Cu(0 2 24) and Cu(1 1 17). 1-3 Both surfaces have 2.17-nm-wide (0 0 1) terraces separated by open 1 0 0 (zigzag  ... 
doi:10.1103/physrevb.83.035423 fatcat:dij5nm2ecncmvpbbr5n3b5yy6a

Optimizing the width of strip weeding in arabica coffee in relation to crop age

FC. Araújo, C.P. Ronchi, W.L. Almeida, M.A.A. Silva, C.E.O. Magalhães, P.I.V Good-God
2012 Planta Daninha  
The treatments were arranged in a 9 x 18 split-plot design to test the WSC of 0, 15, 30, 45, 60, 90, 120, 150, and 190 cm, which involved continuously hand-weeding at each side of the coffee row, and 18  ...  Brachiaria decumbens was the main weed accomplishing 88.5% of the total weed dry mass. The minimum width of the WSC increases as the crop ages after transplanting.  ...  Probably, f-values between 1 and 3 (1 ≤ f ≤ 3) will be reasonable.  ... 
doi:10.1590/s0100-83582012000100015 fatcat:jovbhw4j6rbz5ccuvgjpedvqny

CATACLYSMIC VARIABLES OBSERVED DURING K2 CAMPAIGNS 0 AND 1

Zhibin Dai, Paula Szkody, Peter M. Garnavich, Mark Kennedy
2016 Astronomical Journal  
The two known dwarf novae UV Gem and TW Vir and the CVs USNO-B1.01144-00115322 and CSS130516:111236.7+002807 show outbursts, including 1 complete and 3 incomplete normal outbursts and 2 complete superoutbursts  ...  The phased orbital light curves for the other 3 CVs in quiescence display wide (about half cycle) and shallow (< 0.5 mag) eclipse features.  ...  In this paper, we report on the 15 CVs, of which 6 and 9 are in the K2 Campaign 0 (K2-C0) and Campaign 1 (K2-C1) fields, respectively.  ... 
doi:10.3847/0004-6256/152/1/5 fatcat:o4pcultp55gytjac5p3gn6vk34

THE SOLAR CHROMOSPHERE OBSERVED AT 1 Hz AND 0.″2 RESOLUTION

Isabel Lipartito, Philip G. Judge, Kevin Reardon, Gianna Cauzzi
2014 Astrophysical Journal  
Principal Component Analysis shows that the very rapid H alpha variations in the line wings depend mostly on changes of line width and line shift, but for Ca II 854.2 the variations are dominated by changes  ...  Using a slab radiative transfer model, we investigate the physical nature of fibrils in terms of tube-like vs. sheet-like structures.  ...  Since n ∼ 10 is needed to cover an area of width 3 ′′ with 0. ′′ 3 steps, it is clear that n ∼ 30 is needed. Each step will typically require 1s.  ... 
doi:10.1088/0004-637x/785/2/109 fatcat:wavppfkyfregnkipgf5rul6vxq

Estimating the Minimum Required Width of Signalized Crosswalks Considering Bi-Directional Pedestrian Flow and Different Age Groups

Wael K.M. ALHAJYASEEN, Hideki NAKAMURA
2010 Asian Transport Studies  
A set of criteria based on pedestrian crossing speed is developed to identify the minimum required crosswalk width.  ...  However, optimizing crosswalk configurations including width is an important concern to improve the overall performance of signalized intersections.  ...  - w) P ( . 4513 . 0 5486 2 - w) P ( . 383 0 5323 2 . - w) P ( . Table 3 . 3 Minimum required crosswalk width at 6-and 4-lane carriagewaysTable 4.  ... 
doi:10.11175/eastsats.1.181 fatcat:bwghpa2qc5dplgbdybblrclrwq

Dense Cores in Dark Clouds. XIV. N2H+(1–0) Maps of Dense Cloud Cores

Paola Caselli, Priscilla J. Benson, Philip C. Myers, Mario Tafalla
2002 Astrophysical Journal  
We present results of an extensive mapping survey of N2H+(1-0) in about 60 low mass cloud cores already mapped in the NH3(1,1) inversion transition line.  ...  The deviation in line width correlates with the mean line width, suggesting that the line of sight contains 10 coherence lengths.  ...  widths are "coherent" -nearly constant in the interior of NH 3 maps.  ... 
doi:10.1086/340195 fatcat:zbiilg3qzvfgvajuxurvikatpm

Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system

Anne D Lamirand, Márcio M Soares, Maurizio De Santis, Aline Y Ramos, Stéphane Grenier, Hélio C N Tolentino
2015 Journal of Physics: Condensed Matter  
The structure and strain of ultrathin CoO films grown on a Pt(001) substrate and on a ferromagnetic PtFe pseudomorphic layer on Pt(001) have been determined with insitu and real time surface x-ray diffraction  ...  The tetragonal contribution to the distortion results in a ratio c/a > 1, opposite to that found in the low temperature bulk CoO phase.  ...  We have then c = (−c 1 , 0, c 3 ).  ... 
doi:10.1088/0953-8984/27/8/085001 pmid:25604708 fatcat:j7rqi6k36jbtrjvy2xqkzdy6ue

Manipulating the orientation of an organic adsorbate on silicon: a NEXAFS study of acetophenone on Si(0 0 1)

Kane M O'Donnell, Oliver Warschkow, Asif Suleman, Adam Fahy, Lars Thomsen, Steven R Schofield
2014 Journal of Physics: Condensed Matter  
in the reorientation of the adsorbate into an upright configuration.  ...  We show that the dominant room temperature adsorption structure lies flat on the substrate, while moderate thermal annealing induces the breaking of Si-C bonds between the phenyl ring and the surface resulting  ...  We acknowledge financial support from the Engineering and Physical Sciences Research Council (EP/H003991/1; EP/L002140/1) and the Australian Synchrotron.  ... 
doi:10.1088/0953-8984/27/5/054002 pmid:25414086 fatcat:kd64qrk3h5du3bmdemlil4tece
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