Dynamics of Protonated Acetonitrile Formation in CD3CN+· + CH3CN Collisions: A Crossed-Beam Scattering Study

1998 ◽  
Vol 63 (8) ◽  
pp. 1152-1160 ◽  
Author(s):  
Ján Žabka ◽  
Zdeněk Dolejšek ◽  
Inosuke Koyano ◽  
Zdeněk Herman
Keyword(s):  
Energy Range ◽  
Collision Energy ◽  
Intermediate Complex ◽  
Angular Distributions ◽  
Atom Transfer ◽  
Protonation Reaction ◽  
Beam Scattering ◽  
Reaction Proceeds ◽  
Deuteron Transfer ◽  
Scattering Study

Dynamics of the elementary protonation reaction in collisions of the acetonitrile cation with acetonitrile was investigated in crossed-beam scattering experiments in the hyperthermal collision energy range 1.17-2.5 eV. The reaction proceeds by three parallel collision mechanisms: direct proton (deuteron) transfer, direct H-atom transfer, and decomposition of an intermediate complex. The relative contributions of the three mechanisms to the formation of the product at T = 2.5 eV are about equal. Analysis of product angular distributions suggests that the geometry of the critical configuration of the decomposing intermediate is prolate, not far from linear.

Dynamics of the ion-molecule reaction D2O+ (NH3, NH2) HD2O+ from crossed-beam scattering experiments

1988 ◽  
Vol 53 (10) ◽  
pp. 2168-2174 ◽  
Author(s):  
Jan Vančura ◽  
Zdeněk Herman
Keyword(s):  
Collision Energy ◽  
Intermediate Complex ◽  
Atom Transfer ◽  
Molecule Reaction ◽  
Scattering Experiment ◽  
Critical Configuration ◽  
Beam Scattering

Dynamics of the HD2O+ formation in the reaction of D2O+ and NH3 was investigated in a crossed-beam scattering experiment. At T = 1·5 eV (c.m.) the product is formed simultaneously by two different collision mechanisms, by a direct H-atom transfer and by the decomposition of an intermediate complex (D2O.NH3)+; the probabilities of the two mechanisms are about equal at this collision energy. The scattering makes it possible to suggest that in the critical configuration the intermediate complex is a prolate, near-linear species D2OH+.NH2.

He Atomic Beam Scattering Study of Pt(111) Super-Structure Surface Induced by High Energy Molecular Beam of H2O

1999 ◽  
Vol 38 (Part 1, No. 2A) ◽  
pp. 868-870 ◽  
Author(s):  
Yasunobu Kino ◽  
Fumiaki Murakami ◽  
Shinjiro Yagyu ◽  
Shigehiko Yamamoto
Keyword(s):  
Atomic Beam ◽  
Molecular Beam ◽  
High Energy ◽  
Super Structure ◽  
Beam Scattering ◽  
Structure Surface ◽  
Scattering Study

scholarly journals Angular distributions and anisotropy of fission fragments from neutron-induced fission in intermediate energy range 1–200 MeV

2017 ◽  
Vol 146 ◽  
pp. 04011 ◽  
Author(s):  
Alexander S. Vorobyev ◽  
Alexei M. Gagarski ◽  
Oleg A. Shcherbakov ◽  
Larisa A. Vaishnene ◽  
Alexei L. Barabanov
Keyword(s):  
Energy Range ◽  
Intermediate Energy ◽  
Angular Distributions ◽  
Fission Fragments ◽  
Induced Fission

Angular Distributions and Anisotropy of Fragments from the Neutron-Induced Fission of 237Np in the Energy Range of 1–200 MeV: Measurement Data and Model Calculations

JETP Letters ◽  
2019 ◽  
Vol 110 (4) ◽  
pp. 242-249 ◽  
Author(s):  
A. S. Vorobyev ◽  
A. M. Gagarski ◽  
O. A. Shcherbakov ◽  
L. A. Vaishnene ◽  
A. L. Barabanov
Keyword(s):  
Energy Range ◽  
Measurement Data ◽  
Angular Distributions ◽  
Model Calculations ◽  
Induced Fission

Seemingly Anomalous Angular Distributions in H + D2 Reactive Scattering

Science ◽  
2012 ◽  
Vol 336 (6089) ◽  
pp. 1687-1690 ◽  
Author(s):  
Justin Jankunas ◽  
Richard N. Zare ◽  
Foudhil Bouakline ◽  
Stuart C. Althorpe ◽  
Diego Herráez-Aguilar ◽  
...  
Keyword(s):  
Cross Sections ◽  
Collision Energy ◽  
Minimum Energy ◽  
Angular Distributions ◽  
Quantum Mechanical ◽  
Minimum Energy Path ◽  
Reactive Scattering ◽  
Rotational Excitation ◽  
Reaction Products ◽  
Trajectory Calculations

When a hydrogen (H) atom approaches a deuterium (D2) molecule, the minimum-energy path is for the three nuclei to line up. Consequently, nearly collinear collisions cause HD reaction products to be backscattered with low rotational excitation, whereas more glancing collisions yield sideways-scattered HD products with higher rotational excitation. Here we report that measured cross sections for the H + D2 → HD(v′ = 4, j′) + D reaction at a collision energy of 1.97 electron volts contradict this behavior. The anomalous angular distributions match closely fully quantum mechanical calculations, and for the most part quasiclassical trajectory calculations. As the energy available in product recoil is reduced, a rotational barrier to reaction cuts off contributions from glancing collisions, causing high-j′ HD products to become backward scattered.

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