We have combined a Stark decelerator with a molecular beam-surface scattering setup to accurately measure the absolute electron emission yield, γ, of CO (a(3)Π) quenching at a Au(111) surface with quantum state resolution. We clearly observe an enhanced probability of electron emission when scattering vibrationally excited states of CO from the surface.

43 44 We present a new rough-surface thermophysical model (Advanced Thermophysical Model or 45 ATPM) that describes the observed directional thermal emission from any atmosphereless 46 planetary surface. It explicitly incorporates partial shadowing, scattering of sunlight, 47 selfheating and thermal-infrared beaming (re-radiation of absorbed sunlight back towards the 48 Sun as a result of surfa...

CdSe quantum dots (QDs) doped glasses have been widely investigated for optical filters, LED color converter and other optical emitters. Unlike CdSe QDs in solution, it is difficult to passivate the surface defects of CdSe QDs in glass matrix, which strongly suppress its intrinsic emission. In this study, surface passivation of CdSe quantum dots (QDs) by Cd1-xZnxSe shell in silicate glass was r...

Three-dimensional topological insulators are materials that behave as an insulator in the interior, but as a metal on the surface with Dirac surface states protected by the topological properties of the bulk wavefunctions. The newly discovered second surface state, located about 1.5 eV above the conduction band in Bi2Se3 allows direct photoexcitation of the surface electrons in n-doped samples ...

the first step in studying dust events is the estimation of dust emission from sources. in this study, the simulations of the vertical dust flux (vdf) over iran by the mba (marticorena, bergametti, and alfaro) and shao schemes are compared. the mba scheme is energy-based and derived on the basis of energy balance between the kinetic energy of saltating particles and binding energy of the surfac...

Suppression of the secondary electron emission is an important technique of mitigating deleterious effect of the electron cloud in modern accelerators. Several methods are routinely used in practice to lower the secondary emission yield (SEY) which include special coatings of the metal surface, surface cleaning and beam scrubbing. In this paper we study another approach to suppress effective SE...

mineral dust is produced from both natural and anthropogenic sources. dust aerosols can be transported over long distances in the atmosphere. they reduce the incident shortwave radiation to the surface by absorbing and scattering the solar radiation; thereby leading to a cooling effect at the surface and lower tropospheric temperature. on the other hand, by absorption and re-emission of longwav...

We have computed absorption and emission energies of silicon nanocrystals as a function of size and of surface passivants, using both density functional theory and quantum Monte Carlo calculations. We have found that the ionic rearrangements and electronic relaxations occurring upon absorption and emission are extremely sensitive to surface chemistry. In particular, nanoclusters with similar si...

43 44 We present a new rough-surface thermophysical model (Advanced Thermophysical Model or 45 ATPM) that describes the observed directional thermal emission from any atmosphereless 46 planetary surface. It explicitly incorporates partial shadowing, scattering of sunlight, 47 selfheating and thermal-infrared beaming (re-radiation of absorbed sunlight back towards the 48 Sun as a result of surfa...

background: the aim of this study was to determine bioavailability heavy metal concentrations of cu, cd, cr, co and zn and health risk assessment in different types of klang district, selangor (malaysia) urban surface soil using in physiologically based extraction test in vitro human digestion model. methods: a total of 76 urban surface soil was sampled based on seven different types of land us...