Photon stimulated desorption

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August undefined, 2024

WebIn earlier experiments on the X-ray photon energy dependence of the F-centre yield by monochromatic X-rays, a step was found at the ClK edge in the yield of the F centres in KC1 [29]. ... approaches Walkup and Avouris 1331 have used molecular dynamics to follow the transient motions associated with stimulated desorption in an approach mak- ing ... WebSynchrotron radiation at the Synchrotron Ultraviolet Radiation Facility at the National Bureau of Standards has been employed to study the adsorption of oxygen on a Ti(001) surface …

Electron- and Photon-Stimulated Desorption: Probes of

WebDec 1, 2011 · Adsorption behavior of atomic deuterium on a hexagonal boron nitride (h-BN) thin film is studied by photon-stimulated ion desorption (PSID) of D + and near edge X-ray absorption fine structure (NEXAFS) at the B and N K-edges.After the adsorption of atomic deuterium, D + desorption yield η(hν) shows clear enhancement at the B K-edge and … WebThe Workshop on Desorption Induced by Electronic Transitions (DIET) took place May 12-14, 1982, in Williamsburg, Virginia. The meeting brought together, for the ... workers in the fields of electron and photon stimulated desorption from surfaces, as well as many workers in related fields, including ... sputtering, gas-phase photodissociation ... grand theft auto vice city ac

Experimental research on photon-stimulated desorption from CuCrZr

Web5]; lowering the photon and electron stimulated gas desorption yields [6, 7] was achieved by having a denser layer at the interface [8]. It was also found that the non-activated or CO saturated NEG coating can be activated by synchrotron radiation (SR) or electron bombardment. The selective pumping of NEG coating is a performance WebJan 1, 2024 · In this study, photon-stimulated gas desorption yields from CuCrZr, which are used for manufacturing high-heat-load elements, were measured using a synchrotron light with a critical energy of 10.4 keV at the Shanghai Synchrotron Radiation Facility. CuCrZr samples were exposed to synchrotron radiation (SR) under both normal and grazing … grand theft auto vice city 3dm

Vacuum Conditioning of the SOLEIL Storage Ring with …

(PDF) Synchrotron Radiation-Induced Desorption from a

WebMay 15, 1984 · Photon stimulated desorption (PSD) refers to the ejection of ions, atoms, or molecular fragments from a surface initiated by the adsorption of single photons; to date, most studies have concentrated on the detection of ions. The properties of PSD which make it attractive as a surface characterization tool are its extreme surface sensitivity ... WebPhoton-stimulated desorption (PSD) from the walls of electron storage rings and associated beamlines imposes serious limits on their beam quality and beam lifetimes. Stainless … chinese restaurants walkersville mdWebMoreover, photon-stimulated desorption studies that make use of synchrotron radiation reveal the fundamental electronic excitations that lead to bond-breaking processes at … chinese restaurants waco

"WebAug 31, 1998 · Photon stimulated desorption ABSTRACT For condensed benzene ice layers, core photoabsorption near edge structure (x‐ray absorption; recorded by Auger electron … " - Photon stimulated desorption

Photon stimulated desorption

WebJul 1, 2007 · Photon‐stimulated desorption (PSD) from the walls of electron storage rings and associated beamlines imposes serious limits on their beam quality and beam lifetimes. Stainless steel (SS) is the ... WebIn this chapter, we describe a family of SR-based techniques utilizing photon-stimulated desorption (PSD) for the study of surfaces and other low-dimensional structures. It is the objective of this chapter to survey the unique scientific information concerning the …

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WebJul 18, 2024 · However, current estimates of sulfur desorption from Mercury's surface based on solar wind sputtering and micrometeorite impact vaporization underestimate the … WebMay 12, 2024 · Thus, photon-stimulated desorption of adsorbates is the most likely mechanism responsible for plasma cooling. To further reinforce this plasma-induced evaporative cooling of a metal surface, we ...

WebMay 19, 2006 · Photon-stimulated desorption is a powerful tool to study fundamental processes in adsorbate-surface systems, as well as to achieve selective surface reactions for controlled surface processing (1–4).Photons are easily directed and tuned in energy to induce transitions in atomic and molecular states, with high spatial and temporal precision. WebJul 13, 2001 · Photon stimulated desorption (PSD) from KEKB factory copper chambers was measured at the National Synchrotron Light Source (NSLS), located at the Brookhaven Laboratory. The KEKB is an asymmetrical collider recently constructed in Ibaraki, Japan. The collider utilizes two UHV ring chambers, one for a 3.5 GeV positron beam and the other for …

WebAug 12, 1999 · The measurement scheme for photon-stimulated desorption (PSD) of Na atoms includes a mechanically chopped photon source (500-W Hg arc lamp with filters), a … WebJan 31, 2001 · Not only does it provide distributed pumping but also reduces the photon and electron stimulated desorption (PSD and ESD) yields [6] [7][8], which allows reduction of the number of pumps and their ...

WebPhoton stimulated desorption PSD studies using synchrotron radiation are providing new insights into fundamental electronic excitation processes at surfaces. Mechanisms for …

WebJun 29, 2024 · The strong temperature dependence is attributed to competition between thermal desorption of the primary photoproduct and secondary photochemical steps. The aldehyde, isobutanal, is the primary photoproduct of isobutanol. ... (110) including temperature-programmed desorption of H 2 O and photon-stimulated desorption of O 2; ... grand theft auto vice city 3WebMay 15, 1984 · Photon stimulated desorption (PSD) refers to the ejection of ions, atoms, or molecular fragments from a surface initiated by the adsorption of single photons; to date, … chinese restaurants vancouver washingtonWebFeb 27, 2007 · The photon-stimulated desorption (PSD) of O+ ions from the alpha-oxygen phase on Mo(100) has been monitored through and above the Mo L1(2s) absorption edge (2866 eV) and is compared to the ... grand theft auto v gta wikiWeb(Q TH) and photon-stimulated desorption (Q PSD). Q TH arises from the chamber wall and depends on the material. Stainless steel is the material chosen for the vacuum chamber, for which Q TH is about 2.0×10-12 Torr L s-1 cm-2 near 300 K. Q PSD, which is much greater than the rate of thermal desorption, is the major source of gas, and can be ... grand theft auto vice city achievementWebJun 4, 1998 · In our search for surfaces exhibiting the lowest photon stimulated desorption, we have exposed a 3‐m‐long beam tube to photons from the vacuum ultraviolet ring of … grand theft auto vice cWebOct 1, 2024 · The thermal outgassing of NEG coated chamber is negligible, and the photon or electron stimulated desorption significantly decreases. A typical getter coating film composed of titanium (Ti), zirconium (Zr) and vanadium (V) has a low activation temperature of 180 °C (for 24 h) [ 1 , 6 ], and so the activation temperatures for NEG films … grand theft auto vice city amazonWebAbstract. A model calculation is presented for photo-stimulated desorption of adsorbates from a metal surface. In the model, the electron system of the material is described by a … grand theft auto vice city apk obb download