Ablation yield and angular distribution of ablated particles from laser-irradiated metals: The most fundamental determining factor

2011 ◽  
Vol 257 (7) ◽  
pp. 2854-2860 ◽  
Author(s):  
Dilawar Ali ◽  
M.Z. Butt ◽  
M. Khaleeq-ur-Rahman
Author(s):  
Ryuichi Shimizu ◽  
Ze-Jun Ding

Monte Carlo simulation has been becoming most powerful tool to describe the electron scattering in solids, leading to more comprehensive understanding of the complicated mechanism of generation of various types of signals for microbeam analysis.The present paper proposes a practical model for the Monte Carlo simulation of scattering processes of a penetrating electron and the generation of the slow secondaries in solids. The model is based on the combined use of Gryzinski’s inner-shell electron excitation function and the dielectric function for taking into account the valence electron contribution in inelastic scattering processes, while the cross-sections derived by partial wave expansion method are used for describing elastic scattering processes. An improvement of the use of this elastic scattering cross-section can be seen in the success to describe the anisotropy of angular distribution of elastically backscattered electrons from Au in low energy region, shown in Fig.l. Fig.l(a) shows the elastic cross-sections of 600 eV electron for single Au-atom, clearly indicating that the angular distribution is no more smooth as expected from Rutherford scattering formula, but has the socalled lobes appearing at the large scattering angle.


2020 ◽  
Vol 23 (1) ◽  
pp. 66-71
Author(s):  
E. A. Gurnevich ◽  
I. V. Moroz

The Smith-Purcell radiation of a charged particle moving in a periodic structure is analysed theoretically. The considered structure consists of two planar diffraction gratings with different periods which are formed by parallel conducting wires. The analytical expression for the spectral-angular distribution of radiation is obtained. It is shown that the angular distribution of radiation can be made narrower by using two gratings instead of one, and radiation intensity can be manipulated by parallel relative shift of gratings. The obtained results are of great importance for the research and development of high power radiation sources based on volume free-electron lasers.


2002 ◽  
Vol 715 ◽  
Author(s):  
J. Krc ◽  
M. Zeman ◽  
O. Kluth ◽  
F. Smole ◽  
M. Topic

AbstractThe descriptive scattering parameters, haze and angular distribution functions of textured ZnO:Al transparent conductive oxides with different surface roughness are measured. An approach to determine the scattering parameters of all internal interfaces in p-i-n a-Si:H solar cells deposited on the glass/ZnO:Al substrates is presented. Using the determined scattering parameters as the input parameters of the optical model, a good agreement between the measured and simulated quantum efficiencies of the p-i-n a-Si:H solar cells with different interface roughness is achieved.


2019 ◽  
Vol 12 (2) ◽  
pp. 78-87
Author(s):  
Petru TĂRCHILĂ

Judicial psychology is the science that analyzes and tries to understand the criminal phenomenon in general and its determinant factor in particular, by the complexity of factors that generate it and by the diversity of its forms of manifestation. Although the determining factor of criminal behavior is always subjective being generated by the psychic of the offender, this aspect must be correlated with the context in which it manifests itself: social, economic, cultural context etc. Judicial psychology investigates the behavior of the individual in all its aspects, seeking a scientific explanation of the mechanisms and factors enhancing criminal favors, thus enabling the identification of the preventive measures to be taken to reduce the categories of offenses. It studies the psycho-behavioral profile of the offender, identifying the causes that determined its behavior in order to take preventive measures.The domain of judicial psychology is mainly deviance, conduct that departs from the moral or legal norms that are dominant in a given culture. The object of judicial psychology is the criminal act, correlated with the psychosocial characteristics of the participants in the judicial action (offender, victim, witness, investigator, magistrate, lawyer, civil party, educator, etc.). The science of judicial psychology also analyzes how these characteristics appear and manifest themselves in concrete and special conditions of their interaction in three phases of the criminal act: the pre-criminal phase, the actual criminal phase and the post-criminal phase.


Metahumaniora ◽  
2018 ◽  
Vol 8 (3) ◽  
pp. 312
Author(s):  
Wagiati Wagiati

AbstrakPenelitian ini berjudul “Pergeseran Bahasa Sunda dalam Leksikon Makanan Tradisional Sunda di Kabupaten Bandung dalam Perspektif Sosiolinguistik Mikro”. Tujuan penelitian ini adalah menjelaskan bentuk-bentuk perubahan dan inovasi bahasa dalam leksikon-leksikon makanan tradisional Sunda yang menjadi faktor penentu terjadinya pemertahanan atau pergeseran suatu bahasa. Metode yang digunakan dalam penelitian ini adalah metode kualitatif-deskriptif. Sumber data pada penelitian ini berupa leksikon-leksikon makanan tradisional di Kabupaten Bandung. Hasil penelitian menunjukkan bahwa (1) bahasa Sunda dalam leksikon makanan tradisional Sunda sebagian besar telah mengalami inovasi; (2) gejala perubahan bentuk dari leksikon-leksikon makanan tradisional Sunda adalah inovasi leksikal penuh, inovasi fonetis, dan inovasi morfemis; (3) bahasa Sunda di Kabupaten Bandung dalam konsep makanan tradisional Sunda telah mengalami pergeseran bahasa secara sosiolinguistik mikro, mengingat faktor-faktor internal bahasa, yaitu berupa inovasi, telah terjadi. Inovasi tersebut meliputi inovasi leksikal penuh, inovasi fonologis, dan inovasi morfemis. Faktor-faktor internal bahasa ini menjadi faktor utama pemertahanan dan pergeseran bahasa.Kata kunci: pergeseran bahasa, makanan tradisional, sosiolinguistik mikroAbstractThe article is entitled "The shifting of Sundanese Language in Lexiconsof Sundanese Food in Bandung Regency studied by Micro Sociolinguistics". The purpose of this study is to describe the forms of change and linguistic innovation in the lexiconsof Sundanesetraditional food which become the determining factor of a language retention or shift. The methods used in this research is descriptive-qualitative method. The data source on this research are lexicons of Sundanese traditional foods in Bandung Regency. The results show that (1) Sundanese Language in the lexiconsof Sundanese Food in the majority hasundergone an innovation; (2) the morphemic change phenomemaof theSundanese traditional food lexicons consist of the full lexical innovation, innovation, innovation and phonetic morfemis; (3) There has been a shift in Sundanese language micro-sociolinguistically regarding the lexiconsof Sundanese traditional food in Bandung Regency based on internal factors of language, i.e. in the form of innovation. These innovations include the full lexical innovation, phonological innovation, and innovation morfemis. Internal factors of a language became a major factor of language retention and language shift.Keywords: language shift, traditional food, micro-sociolinguistic


Sign in / Sign up

Export Citation Format

Share Document