Product state distributions for inelastic and reactive H+D2 collisions as functions of collision energy

1985 ◽  
Vol 83 (5) ◽  
pp. 2201-2206 ◽  
Author(s):  
Normand C. Blais ◽  
Donald G. Truhlar
Keyword(s):  
Collision Energy ◽  
Product State

H+D2 reaction dynamics. Determination of the product state distributions at a collision energy of 1.3 eV

1984 ◽  
Vol 80 (9) ◽  
pp. 4142-4156 ◽  
Author(s):  
Ernesto E. Marinero ◽  
Charles T. Rettner ◽  
R. N. Zare
Keyword(s):  
Collision Energy ◽  
Reaction Dynamics ◽  
Product State

Quasiclassical Trajectory Calculations of Stereodynamics and Product State Distributions in the Reaction of H with OCl

2013 ◽  
Vol 781-784 ◽  
pp. 14-18
Author(s):  
Xian Fang Yue ◽  
Victor Wei Keh Wu ◽  
Jie Cheng
Keyword(s):  
Vibrational State ◽  
Collision Energy ◽  
Energy Surface ◽  
Product State ◽  
Title Reaction ◽  
Ground Vibrational State ◽  
Trajectory Calculation ◽  
Trajectory Calculations ◽  
Vibrational Levels ◽  
Quasiclassical Trajectory Calculation

A first quasiclassical trajectory calculation for the reaction H + OCl OH + Cl, HCl + O has been carried out on the ground 11A' potential energy surface (PES) at the collision energy of 7.6 kcal/mol. The stereodynamics and product state distributions were focused on computation and analysis. It was found that, for both the OH and HCl products, the product rotational alignment and orientation were very weak. Most of the OH products are at lower vibrational levels. The HCl products dominantly populate in the ground vibrational state v'=0. Inverted rotational state distributions were found in each of the vibrational state for both the OH and HCl products. As a consequence, the title reaction takes place dominantly through an indirect mechanism involving a long-lived complex.

Product state distributions for the vibrational predissociation of NeCl2

1989 ◽  
Vol 90 (5) ◽  
pp. 2605-2616 ◽  
Author(s):  
Joseph I. Cline ◽  
N. Sivakumar ◽  
Dwight D. Evard ◽  
Craig R. Bieler ◽  
Brian P. Reid ◽  
...  
Keyword(s):  
Product State ◽  
Vibrational Predissociation

scholarly journals On the scaling of fragmentation and energy dissipation in collisions of dust aggregates

2021 ◽  
Vol 23 (2) ◽  
Author(s):  
Philipp Umstätter ◽  
Herbert M. Urbassek
Keyword(s):  
Energy Dissipation ◽  
Collision Energy ◽  
Velocity Range ◽  
Collision Velocity ◽  
Granular Mechanics ◽  
Extra Factor ◽  
Cluster Fragmentation ◽  
Silica Clusters ◽  
Large Clusters ◽  
Small Clusters

Abstract Fragmentation of granular clusters may be studied by experiments and by granular mechanics simulation. When comparing results, it is often assumed that results can be compared when scaled to the same value of $$E/E_{\mathrm{sep}}$$ E / E sep , where E denotes the collision energy and $$E_{\mathrm{sep}}$$ E sep is the energy needed to break every contact in the granular clusters. The ratio $$E/E_{\mathrm{sep}}\propto v^2$$ E / E sep ∝ v 2 depends on the collision velocity v but not on the number of grains per cluster, N. We test this hypothesis using granular-mechanics simulations on silica clusters containing a few thousand grains in the velocity range where fragmentation starts. We find that a good parameter to compare different systems is given by $$E/(N^{\alpha }E_{\mathrm{sep}})$$ E / ( N α E sep ) , where $$\alpha \sim 2/3$$ α ∼ 2 / 3 . The occurrence of the extra factor $$N^{\alpha }$$ N α is caused by energy dissipation during the collision such that large clusters request a higher impact energy for reaching the same level of fragmentation than small clusters. Energy is dissipated during the collision mainly by normal and tangential (sliding) forces between grains. For large values of the viscoelastic friction parameter, we find smaller cluster fragmentation, since fragment velocities are smaller and allow for fragment recombination. Graphic abstract

scholarly journals The Little-Bang and the femto-nova in nucleus-nucleus collisions

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Nu Xu ◽  
Kenji Fukushima ◽  
Bedangadas Mohanty
Keyword(s):  
Collision Energy ◽  
Particle Production ◽  
Gluon Plasma ◽  
Baryon Density ◽  
Point Particle ◽  
Current Status ◽  
Density Region ◽  
Qcd Critical Point ◽  
Qcd Phase Diagram ◽  
Lower Collision Energy

AbstractWe make a theoretical and experimental summary of the state-of-the-art status of hot and dense QCD matter studies on selected topics. We review the Beam Energy Scan program for the QCD phase diagram and present the current status of the search for the QCD critical point, particle production in high baryon density region, hypernuclei production, and global polarization effects in nucleus-nucleus collisions. The available experimental data in the strangeness sector suggests that a grand canonical approach in the thermal model at high collision energy makes a transition to the canonical ensemble behavior at low energy. We further discuss future prospects of nuclear collisions to probe properties of baryon-rich matter. Creation of a quark-gluon plasma at high temperature and low baryon density has been called the “Little-Bang” and, analogously, a femtometer-scale explosion of baryon-rich matter at lower collision energy could be called the “femto-nova”, which could possibly sustain substantial vorticity and a magnetic field for non-head-on collisions.

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