Desorption ions induced

P. Duck, W. Treu, W. Galster, H. Frohlich, and H. Voit. Heavy Ion Induced Desorption of Organic Compounds. Nucl. Instr. Meth., 168(1980) 601-605. 

K. Wien. Fast Heavy Ion Induced Desorption. Rad. Eff. Defect. Solids, 109(1989) 137-167. 

The application of molecular SIMS as a sensitive ionization source for nonvolatile and thermally labile molecules compares favorably with other new ionization methods in mass spectrometry such as field desorption (FD), Californium-252 plasma desorption (PD), fast heavy ion induced desorption (FHIID), laser desorp-... 

Ionization Methods/Processes. The recent development of several new ionization methods in mass spectrometry has significantly improved the capability for the analysis of nonvolatile and thermally labile molecules [18-23]. Several of these methods (e.g., field desorption (FD), Californiun-252 plasma desorption (PD), fast heavy ion induced desorption (FHIID), laser-desorption (LD), SIMS, and fast atom bombardment (FAB) or liquid SIMS) desorb and ionize molecules directly from the solid state, thereby reducing the chance of thermal degradation. Although these methods employ fundamentally different excitation sources, similarities in their mass spectra, such as, the appearance of protonated, deprotonated, and/or cationized molecular ions, suggest a related ionization process. 

Sundqvist, B., Ed. "Ion Induced Desorption of Molecules From Bioorganic Solids" Nucl. Instrum. Methods 1982, 198,... 

Desorption of impurities adsorbed on the first wall and limiters may significantly contribute to the total impurity influx into the plasma during a discharge. In addition to thermal desorption, one must consider ion and neutral atom impact desorption, electron induced desorption and photon induced desorption. Since thermal desorption is a relatively well understood process it will not be further discussed here although it is obviously of great importance to Tokamak operation. 

The velocity of the recycling hydrogen atoms is determined by reflection, desorption and ion-induced desorption. The atoms originating from H2 gain their energy from the dissociation process. The velocity distribution contains... 

Wien K (1989) Fast heavy ion induced desorption. Radiat Effects Defect Solid 109 137-167 Willet SD (1992) Modelling thermal annealing of fission tracks in apatite. In Zentilli M, Reynolds PH (eds) Short Course Handbook on low temperature thermochronology. Mineral Assoc Can, Ottawa, p 43-72 Willet SD (1997) Inverse modeling of annealing of fission tracks in apatite 1 A Controlled random search method. Am J Sci 297 939-969... 

Electron beam impact can induce the desorption of molecules—neutral or ionized—in the direction of their chemical bond to the surface. The technique that takes advantage of this phenomenon to learn about surface bond directionality is called electron-stimulated desorption ion-angular distribution (ESDIAD) [56, 61, 64, 79-83]. Describe the bonding of a polyatomic molecule on a transition metal surface as determined by ESDIAD [112]. 

Lucchese, R. R., Thermal spike model for heavy ion induced desorption from surfaces, J. Chem. Phys., 86, 443-453 (1987). 

Macfarlane, R. D. Ion Formation from Organic Solids High Energy Heavy-Ion Induced Desorption. Benninghoven, A. Springer Series in Chemical Physics 1983,25,32-46. 

Stimulated desorption, whether photon, electron, or ion induced, is an inelastic sputtering process as it is the energy associated with the formation of a core hole that results in the emission of the element in question. Indeed, the formation of F " and Cl ions on electron irradiation of Aluminum and Silicon surfaces is accepted to arise through core hole formation followed by ejection through the Coulom-bic repulsion induced. In the case of ion-irradiated surfaces, it has been suggested that stimulated emission arises from Auger electrons formed in relatively distant neighbors (Williams 1981). 

The primary-ion bombardment leads not only to the desorption of sputtered elements and molecules but also to the emission of further. secondary species, among them electrons. The number of emitted electrons per primary ion (the so called ion-induced secondary-electron coefficient) can be as large as 10 according to the particular material. Ion bombardment of insulating surfaces therefore leads to the buildup of positive charge at the surface which can se-... 

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