scholarly journals The H2+ + HD reaction at low collision energies: H3+/H2D+ branching ratio and product-kinetic-energy distributions

2021 ◽  
Vol 23 (4) ◽  
pp. 2676-2685
Author(s):  
Katharina Höveler ◽  
Johannes Deiglmayr ◽  
Josef A. Agner ◽  
Hansjürg Schmutz ◽  
Frédéric Merkt
Keyword(s):  
Kinetic Energy ◽  
Energy Distribution ◽  
Branching Ratio ◽  
Kinetic Energy Distribution ◽  
Energy Distributions ◽  
Product Branching ◽  
Kinetic Energy Distributions

The reactions between H2+ and HD forming H3+ + D as well as H2D+ + H were measured at collision energies between 0 and kB·30 K and a resolution of 75 mK and the H3+/H2D+ product branching ratio and the product kinetic-energy distribution were determined.

Proton transfer dynamics on highly attractive potential energy surfaces: Induced repulsive energy release in O− + HF at high collision energies

1994 ◽  
Vol 72 (3) ◽  
pp. 828-835 ◽  
Author(s):  
M.A. Carpenter ◽  
M.T. Zanni ◽  
D.J. Levandier ◽  
D.F. Varley ◽  
J.M. Farrar
Keyword(s):  
Kinetic Energy ◽  
Potential Energy ◽  
Proton Transfer ◽  
Energy Distribution ◽  
Energy Release ◽  
Collision Energy ◽  
Kinetic Energy Distribution ◽  
Energy Distributions ◽  
Repulsive Energy ◽  
Kinetic Energy Distributions

We present the angular and kinetic energy distributions for the products of the proton transfer reaction O− + HF → OH + F− at center-of-mass collision energies of 45.0 and 55.8 kJ mol−l (0.47 and 0.58 eV, respectively). At both collision energies, the product angular distributions show forward–backward symmetry, characteristic of the decay of a transient complex living at least several rotational periods. The product kinetic energy distributions show structure that is clearly attributable to the formation of OH in v′ = 0,1, and 2. The kinetic energy distribution for a single vibrational state of OH is equivalent to the rotational state distribution for that state. At the higher collision energy, the product kinetic energy distribution shows a clear angular dependence, from which we infer a transition to more direct dynamics involving low impact parameter collisions that access the repulsive wall of the potential surface in bent geometries. The vibrational energy in the products decreases with increasing collision energy, with fV′, the fraction of available energy appearing in vibration, decreasing from 0.28 to 0.22 over the reported collision energy range. We attribute this behavior to a transition from mixed energy release of a Heavy + Light–Heavy collision system dominated by the strong attractive well to induced repulsive energy release as the system reaches the low energy repulsive wall of the potential energy surface.

scholarly journals Thermal and log-normal distributions of plasma in laser driven Coulomb explosions of deuterium clusters

2016 ◽  
Vol 25 (09) ◽  
pp. 1650063 ◽  
Author(s):  
M. Barbarino ◽  
M. Warrens ◽  
A. Bonasera ◽  
D. Lattuada ◽  
W. Bang ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Energy Distribution ◽  
Coulomb Repulsion ◽  
High Energy ◽  
Kinetic Energy Distribution ◽  
Good Representation ◽  
Fusion Reactions ◽  
Energy Distributions ◽  
Ion Kinetic Energy ◽  
Log Normal

In this work, we explore the possibility that the motion of the deuterium ions emitted from Coulomb cluster explosions is highly disordered enough to resemble thermalization. We analyze the process of nuclear fusion reactions driven by laser–cluster interactions in experiments conducted at the Texas Petawatt laser facility using a mixture of D2+3He and CD4+3He cluster targets. When clusters explode by Coulomb repulsion, the emission of the energetic ions is “nearly” isotropic. In the framework of cluster Coulomb explosions, we analyze the energy distributions of the ions using a Maxwell–Boltzmann (MB) distribution, a shifted MB distribution (sMB), and the energy distribution derived from a log-normal (LN) size distribution of clusters. We show that the first two distributions reproduce well the experimentally measured ion energy distributions and the number of fusions from d–d and d-3He reactions. The LN distribution is a good representation of the ion kinetic energy distribution well up to high momenta where the noise becomes dominant, but overestimates both the neutron and the proton yields. If the parameters of the LN distributions are chosen to reproduce the fusion yields correctly, the experimentally measured high energy ion spectrum is not well represented. We conclude that the ion kinetic energy distribution is highly disordered and practically not distinguishable from a thermalized one.

The study of rockfall trajectory and kinetic energy distribution based on numerical simulations

2021 ◽  
Author(s):  
Yuanyuan He ◽  
Lei Nie ◽  
Yan Lv ◽  
Hong Wang ◽  
Senfeng Jiang ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Energy Distribution ◽  
Numerical Simulations ◽  
Kinetic Energy Distribution

Yields and kinetic energy distributions of sputtered neutral copper clusters

1991 ◽  
Vol 259 (3) ◽  
pp. 275-287 ◽  
Author(s):  
S.R. Coon ◽  
W.F. Calaway ◽  
J.W. Burnett ◽  
M.J. Pellin ◽  
D.M. Gruen ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Energy Distributions ◽  
Copper Clusters ◽  
Kinetic Energy Distributions

BIMODAL FISSION IN 258FM

1986 ◽  
Vol 01 (06) ◽  
pp. 377-381 ◽  
Author(s):  
K. DEPTA ◽  
J.A. MARUHN ◽  
W. GREINER ◽  
W. SCHEID ◽  
A. SANDULESCU
Keyword(s):  
Kinetic Energy ◽  
Shell Model ◽  
Fission Products ◽  
Degree Of Freedom ◽  
Total Kinetic Energy ◽  
Heavy Nuclei ◽  
Energy Distributions ◽  
Decay Channels ◽  
Symmetric Fission ◽  
Kinetic Energy Distributions

Within the 2-center shell model we present an explanation for the mass and total-kinetic-energy distributions of fission products of very heavy nuclei called “bimodal fission.” For the case of 258 FM we show that the symmetric fission can be described by a 2-dimensional treatment of the elongation and neck degree of freedom. Owing to shell corrections the system fissions via two decay channels that have distinct kinetic energies.

Kinetic energy distribution of ions in the laser ablation of copper targets

1998 ◽  
Vol 127-129 ◽  
pp. 953-958 ◽  
Author(s):  
S Amoruso ◽  
V Berardi ◽  
R Bruzzese ◽  
N Spinelli ◽  
X Wang
Keyword(s):  
Laser Ablation ◽  
Kinetic Energy ◽  
Energy Distribution ◽  
Kinetic Energy Distribution
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