Computer simulation of atomic-displacement cascades in solids in the binary-collision approximation

1974 ◽  
Vol 9 (12) ◽  
pp. 5008-5024 ◽  
Author(s):  
Mark Robinson ◽  
Ian Torrens
Keyword(s):  
Computer Simulation ◽  
Atomic Displacement ◽  
Binary Collision ◽  
Binary Collision Approximation ◽  
Displacement Cascades ◽  
Collision Approximation

2D Simulation of under-Mask Penetration in 4H-SiC Implanted with Al+ Ions

2011 ◽  
Vol 679-680 ◽  
pp. 421-424 ◽  
Author(s):  
Giorgio Lulli ◽  
Roberta Nipoti
Keyword(s):  
Computer Simulation ◽  
Monte Carlo ◽  
Binary Collision ◽  
Binary Collision Approximation ◽  
2D Simulation ◽  
Simulation Based ◽  
Sio2 Mask ◽  
Sic Wafer ◽  
Collision Approximation ◽  
Peak Value

In this work under-mask penetration of Al+ ions implanted in 4H-SiC is investigated by computer simulation based on the Monte-Carlo binary collision approximation (MC–BCA). Results indicate that a small fraction of ions, implanted normal to a (0001) 4H-SiC wafer (8° off-axis towards the {11-20}), is scattered and become channeled in the <1120> directions perpendicular to the <0001> axis. Due to this phenomenon, doped regions with concentration ≤ 10− 4 of the peak value, may extend laterally for a few µm below the edge of a SiO2 mask.

Displacement cascade decomposition within the Binary Collision Approximation

2011 ◽  
Vol 1298 ◽  
Author(s):  
Laurence Luneville ◽  
David Simeone ◽  
Gianguido Baldinozzi ◽  
Dominique Gosset
Keyword(s):  
Threshold Energy ◽  
Practical Interest ◽  
Md Simulations ◽  
Binary Collision ◽  
Homogeneous Distribution ◽  
Binary Collision Approximation ◽  
Displacement Cascades ◽  
Displacement Cascade ◽  
Nuclear Plants ◽  
Collision Approximation

ABSTRACTThe mechanism of damage production in solids during irradiation is of great practical interest in nuclear technology. The need to increase the life time of current nuclear plants as well as extreme conditions (high temperature and high neutron flux) in new generations of nuclear plants leads to have a deep insight into radiation damage in solids. In fact, the slowing down of particles in solids leads to a non homogeneous distribution of defects in solids, giving rise to complex microstructures with unusual properties. Numerous experiments, Molecular Dynamics (MD) and Monte Carlo (MC) simulations have clearly shown that highly damaged areas called displacement cascades are produced by neutron or impinging ions in solids. It is now clearly established that the number and the distribution of these subcascades dictate the long term evolution of the microstructure under irradiation. In this work, we present a new model to calculate the mean number of displacement cascades produced in a mono-atomic solid by an incident particle within the Binary Collision Approximation framework (BCA) taking into account all information extracted from MD simulations. To reach such a goal, the notion of subcascade threshold energy is introduced and discussed on some examples. Within this formalism, we exhibit a new way to estimate the number of defects created in a displacement cascade integrating results of MD simulations of cascades.

Binary Collision Approximation

2020 ◽  
pp. 595-619 ◽  
Author(s):  
Christophe J. Ortiz ◽  
Laurence Luneville ◽  
David Simeone
Keyword(s):  
Binary Collision ◽  
Binary Collision Approximation ◽  
Collision Approximation

Phase shift of solitary wave in a one-dimensional granular chain

2019 ◽  
Vol 33 (10) ◽  
pp. 1950085
Author(s):  
Xian-Qing Yang ◽  
Yao Yang ◽  
Yang Jiao ◽  
Wei Zhang
Keyword(s):  
Phase Shift ◽  
Solitary Wave ◽  
Numerical Scheme ◽  
Binary Collision ◽  
One Dimensional ◽  
Binary Collision Approximation ◽  
Fifth Order ◽  
The Waves ◽  
Theoretical Results ◽  
Collision Approximation

In this paper, both the fifth-order Runge–Kutta numerical scheme and binary collision approximation are used to study the phase shift. Both numerical and theoretical results are shown that the solitary wave after head-on collision propagates along the chain behind the reference wave in both even and odd numbers of grain chains. It is the well-known feature of the appearance of the phase shift. Those results are in agreement with the experimental results. Furthermore, it is found that the phase shift is not only related to the collision position of the waves, but also to the position where the time is measured. The value of phase shift increases nonmonotonously with increasing the velocity of the opposite propagation of the wave. Binary collision approximation is applied to analyze the phase shift, and it is found that theoretical results agree well with numerical results, especially in the case of phase shift in odd chain.

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