scholarly journals Molecular dynamical study of the energy relaxation processes after heating the vibrational degree of freedom in a diatomic molecular crystal

1988 ◽  
Vol 4 (4) ◽  
pp. 372-377 ◽  
Author(s):  
Chen Zhiying ◽  
Ding Jiaqiang ◽  
D. H. Tsai
Keyword(s):  
Molecular Crystal ◽  
Energy Relaxation ◽  
Degree Of Freedom ◽  
Relaxation Processes ◽  
Vibrational Degree ◽  
Dynamical Study

scholarly journals A Dynamical Study of Fusion Hindrance with Nakajima-Zwanzig Projection Method

2021 ◽  
Author(s):  
Yasuhisa Abe ◽  
David Boilley ◽  
Quentin Hourdillé ◽  
Caiwan Shen
Keyword(s):  
Cross Sections ◽  
Degrees Of Freedom ◽  
Operator Method ◽  
Initial Distribution ◽  
Physical Parameters ◽  
Relaxation Processes ◽  
Fast Variable ◽  
Dynamical Study ◽  
Injection Point ◽  
Slow Variables

Abstract A new framework is proposed for the study of collisions between very heavy ions which lead to the synthesis of Super-Heavy Elements (SHE), to address the fusion hindrance phenomenon. The dynamics of the reaction is studied in terms of collective degrees of freedom undergoing relaxation processes with different time scales. The Nakajima-Zwanzig projection operator method is employed to eliminate fast variable and derive a dynamical equation for the reduced system with only slow variables. There, the time evolution operator is renormalised and an inhomogeneous term appears, which represents a propagation of the given initial distribution. The term results in a slip to the initial values of the slow variables. We expect that gives a dynamical origin of the so-called “injection point s” introduced by Swiatecki et al in order to reproduce absolute values of measured cross sections for SHE. A formula for the slip is given in terms of physical parameters of the system, which confirms the results recently obtained with a Langevin equation, and permits us to compare various incident channels.

A Parameter to Quantify Molecular Quasilinearity

1976 ◽  
Vol 31 (2) ◽  
pp. 139-144 ◽  
Author(s):  
Koichi Yamada ◽  
Manfred Winnewisser
Keyword(s):  
Physical Interpretation ◽  
Separation Of Variables ◽  
Degree Of Freedom ◽  
Rotational Degree ◽  
Vibrational Degree ◽  
Model Calculations ◽  
Linear Configuration ◽  
Oppenheimer Approximation ◽  
Linear Molecules ◽  
Simple Parameter

Abstract A simple parameter is proposed for expressing the quasilinearity of molecules in a quantitative way. The parameter γ0 is defined on the basis of a discussion of the separation of variables in the Born-Oppenheimer approximation. The parameter γ0 assumes the value +1 for bent molecules and -1 for linear molecules. The range from -1 to +1 traces the transition of a vibrational degree of freedom in the linear configuration of a polyatomic molecule into a rotational degree of freedom in the bent configuration. The sequence of molecules along this parameter is shown and model calculations are carried out to further illustrate the physical interpretation of the parameter.

A very rapid electronic relaxation process in a highly conjugated Zn(ii)porphyrin–[26]hexaphyrin–Zn(ii)porphyrin hybrid tape

2016 ◽  
Vol 18 (4) ◽  
pp. 3244-3249 ◽  
Author(s):  
Sangsu Lee ◽  
Hirotaka Mori ◽  
Taegon Lee ◽  
Manho Lim ◽  
Atsuhiro Osuka ◽  
...  
Keyword(s):  
Relaxation Process ◽  
Vibrational Relaxation ◽  
Energy Relaxation ◽  
Relaxation Processes ◽  
Electronic Relaxation ◽  
Vibronic State ◽  
Molecular Systems

We demonstrate that the electronic deactivation overtakes the vibrational relaxation processes in the energy relaxation processes from the initially excited vibronic state manifolds in highly conjugated molecular systems.

Vibrational energy relaxation processes in heme proteins

1988 ◽  
Vol 40-41 ◽  
pp. 571-572 ◽  
Author(s):  
L. Genberg ◽  
F. Heisel ◽  
G. McLendon ◽  
R.J. Dwayne Miller
Keyword(s):  
Heme Proteins ◽  
Vibrational Energy ◽  
Energy Relaxation ◽  
Relaxation Processes ◽  
Vibrational Energy Relaxation

On the role of microstructure in determining the energy relaxation processes of swift heavy ions in CdTe thin films

2008 ◽  
Vol 41 (10) ◽  
pp. 105113 ◽  
Author(s):  
V V Ison ◽  
A Ranga Rao ◽  
V Dutta ◽  
P K Kulriya ◽  
D K Avasthi ◽  
...  
Keyword(s):  
Thin Films ◽  
Heavy Ions ◽  
Energy Relaxation ◽  
Relaxation Processes ◽  
Swift Heavy Ions ◽  
Cdte Thin Films

scholarly journals Study of energy relaxation processes of the surface produced negative ions by using 3D3V-PIC simulation

2017 ◽  
Author(s):  
K. Miyamoto ◽  
I. Goto ◽  
S. Nishioka ◽  
A. Hatayama ◽  
J. Hiratsuka ◽  
...  
Keyword(s):  
Negative Ions ◽  
Energy Relaxation ◽  
Relaxation Processes ◽  
Pic Simulation
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