• Lattice constant of ceria thin film: Temperature dependenceLattice constant of ceria thin film: Temperature dependence

    Abstract. The moment method in statistical (SMM) dynamics is used to study the lattice constant of CeO2 thin films taking into account the anharmonicity effects of the lattice vibrations. The nearest neighbor distance and the lattice constant of CeO2 thin films are calculated as a function of temperature. SMM calculations are performed using th...

    pdf9 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 247 | Lượt tải: 0

  • A study of orange photoluminescence in cubic nanocrystals ZnS: Mn2+A study of orange photoluminescence in cubic nanocrystals ZnS: Mn2+

    Abstract. Pure ZnS and Mn2+-doped ZnS nanocrystals were synthesized using the co-precipitation method. ZnS:Mn2+ samples were produced by changing the V/Ti ratio from 0.0 at.% to 4.5 at.%. The ZnS and low doped ZnS:Mn2+ samples are single phase with sphalerite (cubic) crystal structure. The average particle size is about 3 - 5 nm. The optical ab...

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  • Squarks decay into quarks and gluino in the MSSMSquarks decay into quarks and gluino in the MSSM

    Abstract. We present a phenomenological study of the decay of squarks (top and bottom) into quarks (top and bottom) and gluino in the Minimal Supersymmetric Standard Model (MSSM). The formulae for the decay width and numerical results are obtained. We have calculated the conclusion of the one-loop vertex correction, wave-function correction and...

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  • The equations of state of asymmetric nuclear matterThe equations of state of asymmetric nuclear matter

    1. Introduction The success of nuclear physics in satisfactorily explaining low and mediate energy nuclear phenomena leads to a strong belief that nucleons and mesons are appropriate degrees of freedom. At present, the relativistic treatment of nuclear many-body systems introduced not long ago by Walecka [1-3] turned out to be a quite successfu...

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  • Using aperture photometry to study Messier 67Using aperture photometry to study Messier 67

    Abstract. Studying star clusters is a way to test theories of stellar evolution in astronomy. Using current theories, the mass, age and components of a star are affected and decide the position of star in the Hertzsprung-Russell color-magnitude diagram. To study the role of mass in stellar evolution, we need to look at star clusters of which al...

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  • Ability to increase a weak electromagnetic wave by confined electrons in doped superlattices in the presence of laser radiation modulated by amplitudeAbility to increase a weak electromagnetic wave by confined electrons in doped superlattices in the presence of laser radiation modulated by amplitude

    Abstract. The analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by confined electrons in the presence of laser radiation modulated by amplitude in doped superlattices (DSL) are obtained by using the quantum kinetic equation for electrons in the case of electron–optical phonon scattering. The d...

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  • Real parametric surfaces of bidegree (1, 2) and inverse problems of singularityReal parametric surfaces of bidegree (1, 2) and inverse problems of singularity

    Abstract. In this article we present a complete classification for the parametric surfaces of bidegree (1, 2) over the real field. We also provide some results for the inverse problem: given a segment of a line or twisted cubic curve, we look for a patch (1, 2) which includes this segment as a subset of its singular locus. For instance we chara...

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  • Diffusion mechanism in liquid MgO under high pressureDiffusion mechanism in liquid MgO under high pressure

    Abstract. The diffusion mechanism in liquid MgO under pressure up to 25 GPa at a temperature of 3800K have been studied using molecular dynamics simulation (MD). The results show that each atom undergoes a series of stages while associated with the unchanged structural unit MgOx or OMgy. The diffusivity strongly depends on the rate of transitio...

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  • An Evaluation of Energy-loss Straggling Calculation of the LISE++ CodeAn Evaluation of Energy-loss Straggling Calculation of the LISE++ Code

    ABSTRACT Energy loss straggling was found to be critical for evaluating the energy of the reactions using heavy-ion beams in the early stage of experiments at accelerator facilities. Despite significant attempts simulating this quantity using computer codes such as LISE++ and SRIM, there still exists a discrepancy between experimental data and c...

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  • Tổng hợp nano tinh thể CdSe/ZnS, tổ hợp chúng với polime và khảo sát tính chất quangTổng hợp nano tinh thể CdSe/ZnS, tổ hợp chúng với polime và khảo sát tính chất quang

    1. Mở đầu Các nano tinh thể bán dẫn còn gọi là chấm lượng tử ở dạng huyền phù có phổ phát xạ hẹp, hấp thụ quang học mạnh đã được nghiên cứu cho thấy có nhiều ứng dụng khác nhau, tập trung trong các lĩnh vực đánh dấu huỳnh quang sinh học, các linh kiện phát quang, pin mặt trời và laser [2]. Linh kiện tổ hợp chấm lượng tử - LED gồm hệ ghép các n...

    pdf6 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 268 | Lượt tải: 0