NO(X 2Π) product state distributions in molecule–surface collision‐induced dissociation: Direct inelastic scattering of n,i‐C3F7NO from MgO(100) at Eincident≤7.0 eV

1991 ◽  
Vol 94 (3) ◽  
pp. 2330-2345 ◽  
Author(s):  
E. Kolodney ◽  
P. S. Powers ◽  
L. Hodgson ◽  
H. Reisler ◽  
C. Wittig
Keyword(s):  
Inelastic Scattering ◽  
Collision Induced Dissociation ◽  
Product State ◽  
Surface Collision ◽  
Molecule Surface

Molecule—surface collision-induced dissociation of internally excited NO2 on MgO(100)

1994 ◽  
Vol 221 (5-6) ◽  
pp. 447-452 ◽  
Author(s):  
H. Ferkel ◽  
J.T. Singleton ◽  
H. Reisler ◽  
C. Wittig
Keyword(s):  
Collision Induced Dissociation ◽  
Surface Collision ◽  
Molecule Surface

scholarly journals Stopping molecular rotation using coherent ultra-low-energy magnetic manipulations.

2022 ◽  
Author(s):  
Helen Chadwick ◽  
Mark Somers ◽  
Aisling Stewart ◽  
Yosef Alkoby ◽  
Thomas Carter ◽  
...  
Keyword(s):  
Rotational Level ◽  
Theoretical Models ◽  
Surface Interactions ◽  
Rotational Energy ◽  
Molecular Rotation ◽  
Level Spacing ◽  
Control Scheme ◽  
Surface Collision ◽  
Cold Molecule ◽  
Molecule Surface

Abstract Rotational motion lies at the heart of intermolecular, molecule-surface chemistry and cold molecule science, motivating the development of methods to excite and de-excite rotations. Existing schemes involve perturbing the molecules with photons or electrons which supply or remove energy comparable to the rotational level spacing. Here, we study the possibility of de-exciting the molecular rotation of a D2 molecule, from a J=2 to the non-rotating J=0 state, without using an energy-matched perturbation. We show that a magnetic field which splits the rotational projection states by only pico eV, can change the probability that a molecule-surface collision will stop a molecule from rotating and lose rotational energy which is 9 orders larger than that of the magnetic manipulation. Calculations confirm the origin of the control scheme, but also underestimate rotational flips (Δm_J≠0), highlighting the importance of the results as a sensitive benchmark for further developing theoretical models of molecule-surface interactions.

Low-energy surface collision induced dissociation of Ge and Sn cluster ions

2003 ◽  
Vol 24 (1-3) ◽  
pp. 295-298 ◽  
Author(s):  
Y. Tai ◽  
J. Murakami ◽  
C. Majumder ◽  
V. Kumar ◽  
H. Mizuseki ◽  
...  
Keyword(s):  
Energy Surface ◽  
Low Energy ◽  
Cluster Ions ◽  
Collision Induced Dissociation ◽  
Surface Collision

scholarly journals Exploring the Molecular Conformation Space by Soft Molecule–Surface Collision

2020 ◽  
Vol 142 (51) ◽  
pp. 21420-21427
Author(s):  
Kelvin Anggara ◽  
Yuntao Zhu ◽  
Martina Delbianco ◽  
Stephan Rauschenbach ◽  
Sabine Abb ◽  
...  
Keyword(s):  
Molecular Conformation ◽  
Surface Collision ◽  
Molecule Surface ◽  
Conformation Space

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

Temperature Dependence of the Critical Electron Dose for Fatty Acid Monolayers

1982 ◽  
Vol 40 ◽  
pp. 78-79
Author(s):  
Kenneth H. Downing ◽  
Robert M. Glaeser
Keyword(s):  
Electron Beam ◽  
Fatty Acid ◽  
Inelastic Scattering ◽  
Temperature Dependence ◽  
Structural Damage ◽  
Direct Result ◽  
Second Step ◽  
Strong Temperature Dependence ◽  
Electron Dose ◽  
Covalent Bonds

The structural damage of molecules irradiated by electrons is generally considered to occur in two steps. The direct result of inelastic scattering events is the disruption of covalent bonds. Following changes in bond structure, movement of the constituent atoms produces permanent distortions of the molecules. Since at least the second step should show a strong temperature dependence, it was to be expected that cooling a specimen should extend its lifetime in the electron beam. This result has been found in a large number of experiments, but the degree to which cooling the specimen enhances its resistance to radiation damage has been found to vary widely with specimen types.

The Resolution and Contrast in Biological Sections Determined by Inelastic and Elastic Scattering

1973 ◽  
Vol 31 ◽  
pp. 224-225
Author(s):  
D. L. Misell
Keyword(s):  
Electron Microscopy ◽  
Adverse Effect ◽  
Elastic Scattering ◽  
Inelastic Scattering ◽  
Amorphous Carbon ◽  
Polymeric Materials ◽  
Chromatic Aberration ◽  
Image Resolution ◽  
Quantitative Estimates ◽  
Elastic Ratio

In the electron microscopy of biological sections the adverse effect of chromatic aberration on image resolution is well known. In this paper calculations are presented for the inelastic and elastic image intensities using a wave-optical formulation. Quantitative estimates of the deterioration in image resolution as a result of chromatic aberration are presented as an alternative to geometric calculations. The predominance of inelastic scattering in the unstained biological and polymeric materials is shown by the inelastic to elastic ratio, I/E, within an objective aperture of 0.005 rad for amorphous carbon of a thickness, t=50nm, typical of biological sections; E=200keV, I/E=16.

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