An accurate inter-atomic potential energy surface for ground state of SH2-is reported at the multi-reference configuration interaction level of theory using aug-cc-pVQZ basis set. The calculated ab initio energy points are utilized, after semiempirically correcting the dynamical correlation by the many-body expansion-scaled external correlation method. In order to verify the accuracy of the potential energy surface, molecular reaction dynamics including the relationship between reaction probability and collision energy, thermal rate constant and integral scattering cross section are calculated by using the quantum time-dependent wave packet method. The final results show that our potential energy surface is accurate and the molecular reaction dynamics results are satisfactory, and the accurate potential energy surface and its dynamics results can also lay a foundation for the future experimental research of SH- containing molecules.
利用 aug-cc-pVQZ 基集，在多参考构型相互作用理论水平上报告了 SH2- 基态的精确原子间势能面。利用多体膨胀缩放外部相关方法对动力学相关性进行半经验校正后，利用计算出的 ab initio 能量点。为了验证势能面的准确性，使用量子时变波包法计算了分子反应动力学，包括反应概率与碰撞能量、热速率常数和积分散射截面之间的关系。最终结果表明，我们的势能面是准确的，分子反应动力学结果也是令人满意的，准确的势能面及其动力学结果也可以为今后含 SH 分子的实验研究奠定基础。
{"title":"Potential energy surface and quantum dynamics calculation of SH2-(2A′) based on ab initio scaled external correlation correction","authors":"Hongyu Ma, Ning Gu","doi":"10.1139/cjp-2023-0176","DOIUrl":"https://doi.org/10.1139/cjp-2023-0176","url":null,"abstract":"An accurate inter-atomic potential energy surface for ground state of SH2-is reported at the multi-reference configuration interaction level of theory using aug-cc-pVQZ basis set. The calculated ab initio energy points are utilized, after semiempirically correcting the dynamical correlation by the many-body expansion-scaled external correlation method. In order to verify the accuracy of the potential energy surface, molecular reaction dynamics including the relationship between reaction probability and collision energy, thermal rate constant and integral scattering cross section are calculated by using the quantum time-dependent wave packet method. The final results show that our potential energy surface is accurate and the molecular reaction dynamics results are satisfactory, and the accurate potential energy surface and its dynamics results can also lay a foundation for the future experimental research of SH- containing molecules.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"54 12","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138999841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper, we consider the formation of vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles by numerical simulations of the Gross–Pitaevskii equation. Different dependencies of critical rotation frequency (CRF) and optical lattice height, vortex number, and rotation frequency are studied, depending on the direction of the dipole axis and dipole strength. Our results show that the CRF in z = 0 is minimum. When the optical lattice height is gradually increased, the CRF decreases gradually. Reducing of dipole strength in anisotropic dipole–dipole interaction (DDI) favours the formation of vortices, and such decline in isotropic DDI hinders the creation of vortices. The reason for this difference is that the repulsive interaction is favorable and the attractive interaction is disadvantageous for the vortex formation. In addition, we study the first-order correlation function and focus on variation of coherence. For small rotation frequency, the break of coherence occurs earlier in the case of purely repulsive interaction. With an increase in rotation frequency, the coherence concurrently disappears in layer z = 2. Moreover, we also investigate the quenched dynamics, showing that the increase of angular momentum is induced by changing the direction of dipoles and in this process the vortex number remains unchanged.
在本文中，我们通过对格罗斯-皮塔耶夫斯基方程的数值模拟，考虑了具有倾斜偶极子的玻色-爱因斯坦凝聚体多层堆栈中涡旋的形成。研究了临界旋转频率（CRF）与光晶格高度、涡旋数和旋转频率的不同依赖关系，这取决于偶极子轴的方向和偶极子强度。结果表明，z = 0 时的临界旋转频率最小。当光晶格高度逐渐增加时，CRF 逐渐减小。各向异性偶极子-偶极子相互作用（DDI）中偶极子强度的降低有利于涡旋的形成，而各向同性偶极子-偶极子相互作用（DDI）中偶极子强度的降低则阻碍了涡旋的形成。造成这种差异的原因是，斥力相互作用对涡旋的形成有利，而吸引力相互作用对涡旋的形成不利。此外，我们还研究了一阶相关函数，并关注相干性的变化。对于较小的旋转频率，在纯粹斥力相互作用的情况下，相干性的断裂发生得更早。随着旋转频率的增加，相干性在 z = 2 层同时消失。此外，我们还研究了淬火动力学，结果表明角动量的增加是由偶极子方向的改变引起的，在此过程中涡旋数保持不变。
{"title":"Vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles","authors":"Qiang Zhao","doi":"10.1139/cjp-2023-0095","DOIUrl":"https://doi.org/10.1139/cjp-2023-0095","url":null,"abstract":"In this paper, we consider the formation of vortices in multilayer stacks of Bose–Einstein condensates with tilted dipoles by numerical simulations of the Gross–Pitaevskii equation. Different dependencies of critical rotation frequency (CRF) and optical lattice height, vortex number, and rotation frequency are studied, depending on the direction of the dipole axis and dipole strength. Our results show that the CRF in z = 0 is minimum. When the optical lattice height is gradually increased, the CRF decreases gradually. Reducing of dipole strength in anisotropic dipole–dipole interaction (DDI) favours the formation of vortices, and such decline in isotropic DDI hinders the creation of vortices. The reason for this difference is that the repulsive interaction is favorable and the attractive interaction is disadvantageous for the vortex formation. In addition, we study the first-order correlation function and focus on variation of coherence. For small rotation frequency, the break of coherence occurs earlier in the case of purely repulsive interaction. With an increase in rotation frequency, the coherence concurrently disappears in layer z = 2. Moreover, we also investigate the quenched dynamics, showing that the increase of angular momentum is induced by changing the direction of dipoles and in this process the vortex number remains unchanged.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"35 10","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139009887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Z. Yousaf, M.Z. Bhatti, Timothy Ganesan Andrew, H. Aman
A coupled formulation of the Gauss-Bonnet invariant term G and the
energy momentum trace T term provide a modified f(G,T) gravity,
has been analyzed in this study. The functional form for the
f(G,T) gravity has been taken as f(G,T)=αT+ βGn,
α and β are free parameters. The field equations are
produced in general, which then used a dust case to extract a novel
Hubble parameter. The stability of the assumed model and explanation
for the late time acceleration have been studied by the energy
bound. Furthermore, the dynamical variables are used to analyze the
behavior of the equation of state parameter by restricting different
parameters with respect to the recent observational data. A
quintessence-like evolution has been achieved as a result of this
study.
{"title":"f(G,T) and its Cosmological Implications","authors":"Z. Yousaf, M.Z. Bhatti, Timothy Ganesan Andrew, H. Aman","doi":"10.1139/cjp-2023-0200","DOIUrl":"https://doi.org/10.1139/cjp-2023-0200","url":null,"abstract":"A coupled formulation of the Gauss-Bonnet invariant term G and the
 energy momentum trace T term provide a modified f(G,T) gravity,
 has been analyzed in this study. The functional form for the
 f(G,T) gravity has been taken as f(G,T)=αT+ βG<sup>n</sup>,
 α and β are free parameters. The field equations are
 produced in general, which then used a dust case to extract a novel
 Hubble parameter. The stability of the assumed model and explanation
 for the late time acceleration have been studied by the energy
 bound. Furthermore, the dynamical variables are used to analyze the
 behavior of the equation of state parameter by restricting different
 parameters with respect to the recent observational data. A
 quintessence-like evolution has been achieved as a result of this
 study.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"84 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135092252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Adijgkiga BANOUGA, Abdoul Karim KAGONE, Wêpari Charles YAGUIBOU, Niéssan KOHIO, Zacharie Koalaga, François ZOUGMORE
Le succès ou l'échec de la coupure du courant électrique par le disjoncteur dépend fortement des propriétés physico-chimiques de l'arc électrique créé. Dans ce travail, nous nous intéressons aux propriétés thermodynamiques du plasma d’air contaminé par de la vapeur d’alliage d'argent et de dioxyde d'étain. Il s’agit notamment de la masse volumique, de la vitesse du son dans le plasma, de l’enthalpie massique, de la densité d’énergie et de la densité de flux thermique. Elles sont déterminées à l’équilibre thermodynamique dans une gamme de température de 500 K à 20000 K et à la pression atmosphérique. Les résultats obtenus montrent que, pour une même température donnée, la masse volumique augmente lorsque la vapeur d’alliage d’argent et de dioxyde d’étain augmente dans le mélange. La vitesse du son dans le plasma et la capacité calorifique diminuent lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. Pour une même température donnée, l’enthalpie massique diminue entre 3000 K et 20000 K, avec l’augmentation de vapeur d’alliage AgSnO2. La densité d’énergie et la densité de flux thermique diminuent entre 10000 K et 20000 K, lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. L’augmentation du pourcentage de la vapeur de contact électrique en AgSnO2, ralentit l’extinction de l’arc électrique créé à l’intérieur du disjoncteur, surtout au-delà de 0,1% de vapeur. Ce ralentissement de l’extinction de l’arc électrique peut entraîner un échec de coupure de courant électrique par le disjoncteur et donc détériorer les performances du disjoncteur à air.
断路器切断电流的成功或失败在很大程度上取决于所产生的电弧的物理化学性质。在这项工作中，我们感兴趣的是银合金蒸汽和二氧化锡污染空气等离子体的热力学性质。其中包括密度、等离子体中的声速、质量焓、能量密度和热流密度。它们是在500k到20000 K的温度范围内的热力学平衡和大气压下确定的。结果表明，在给定温度下，合金银和二氧化锡在混合物中的蒸气增加，密度增加。随着混合物中AgSnO2合金蒸汽的增加，等离子体中的声速和热容降低。在相同温度下，随着AgSnO2合金蒸气的增加，质量焓在3000 K ~ 20000 K之间降低。当混合物中AgSnO2合金蒸气增加时，能量密度和热流密度在10000 K ~ 20000 K之间降低。在AgSnO2中电接触蒸汽百分比的增加减缓了断路器内部产生的电弧的熄灭，特别是超过0.1%的蒸汽。这种缓慢的电弧熄灭可能导致断路器断电失败，从而降低空气断路器的性能。
{"title":"Détermination des propriétés thermodynamiques d’un plasma d’air contaminé par de la vapeur d’alliage AgSnO2","authors":"Adijgkiga BANOUGA, Abdoul Karim KAGONE, Wêpari Charles YAGUIBOU, Niéssan KOHIO, Zacharie Koalaga, François ZOUGMORE","doi":"10.1139/cjp-2023-0052","DOIUrl":"https://doi.org/10.1139/cjp-2023-0052","url":null,"abstract":"Le succès ou l'échec de la coupure du courant électrique par le disjoncteur dépend fortement des propriétés physico-chimiques de l'arc électrique créé. Dans ce travail, nous nous intéressons aux propriétés thermodynamiques du plasma d’air contaminé par de la vapeur d’alliage d'argent et de dioxyde d'étain. Il s’agit notamment de la masse volumique, de la vitesse du son dans le plasma, de l’enthalpie massique, de la densité d’énergie et de la densité de flux thermique. Elles sont déterminées à l’équilibre thermodynamique dans une gamme de température de 500 K à 20000 K et à la pression atmosphérique. Les résultats obtenus montrent que, pour une même température donnée, la masse volumique augmente lorsque la vapeur d’alliage d’argent et de dioxyde d’étain augmente dans le mélange. La vitesse du son dans le plasma et la capacité calorifique diminuent lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. Pour une même température donnée, l’enthalpie massique diminue entre 3000 K et 20000 K, avec l’augmentation de vapeur d’alliage AgSnO2. La densité d’énergie et la densité de flux thermique diminuent entre 10000 K et 20000 K, lorsque la vapeur d’alliage AgSnO2 augmente dans le mélange. L’augmentation du pourcentage de la vapeur de contact électrique en AgSnO2, ralentit l’extinction de l’arc électrique créé à l’intérieur du disjoncteur, surtout au-delà de 0,1% de vapeur. Ce ralentissement de l’extinction de l’arc électrique peut entraîner un échec de coupure de courant électrique par le disjoncteur et donc détériorer les performances du disjoncteur à air.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"84 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135092260","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The current research investigates the behavior of the Tsallis holographic dark energy (THDE) model with quintessence in a homogeneous and anisotropic Bianchi type-III (B-III) space-time. We construct the model by using two conditions (i) expansion scalar (theta) is proportionate to shear scalar (sigma) in the model and (ii) hybrid {color{blue} scale factor} a = t^beta e^{gamma t}, where beta>0, gamma>0 are constants. Our study is based on Type Ia supernovae (SNIa) data in combination with CMB and BAO observations (Giostri et al, JCAP 3, 27 (2012), arXiv:1203.3213v2[astro-ph.CO]), the present values of Hubble constant and deceleration parameter are H_{0} = 73.8 and q_{0} = -0.54 respectively. Compiling our theoretical models with this data, we obtain beta = 2.1445~ & ~ 2.1154 for gamma = 0.5 ~ & ~ 1 respectively. We completed an entirely novel form of cosmic model where the expansion occurs during the present accelerated phase for the constraints. We have discussed the conformity among the scalar field model of quintessence and THDE model. To understand the Universe, we have also established the relations for Distance modulus, Luminosity distance, and Angular-diameter distance. Some geometric and physical aspects of the THDE model are also highlighted.
{"title":"Bianchi type-III THDE quintessence model with hybrid scale factor","authors":"Gunjan Varshney, Anirudh Pradhan, Umesh Kumar Sharma","doi":"10.1139/cjp-2023-0201","DOIUrl":"https://doi.org/10.1139/cjp-2023-0201","url":null,"abstract":"The current research investigates the behavior of the Tsallis holographic dark energy (THDE) model with quintessence in a homogeneous and anisotropic Bianchi type-III (B-III) space-time. We construct the model by using two conditions (i) expansion scalar (theta) is proportionate to shear scalar (sigma) in the model and (ii) hybrid {color{blue} scale factor} a = t^beta e^{gamma t}, where beta>0, gamma>0 are constants. Our study is based on Type Ia supernovae (SNIa) data in combination with CMB and BAO observations (Giostri et al, JCAP 3, 27 (2012), arXiv:1203.3213v2[astro-ph.CO]), the present values of Hubble constant and deceleration parameter are H_{0} = 73.8 and q_{0} = -0.54 respectively. Compiling our theoretical models with this data, we obtain beta = 2.1445~ & ~ 2.1154 for gamma = 0.5 ~ & ~ 1 respectively. We completed an entirely novel form of cosmic model where the expansion occurs during the present accelerated phase for the constraints. We have discussed the conformity among the scalar field model of quintessence and THDE model. To understand the Universe, we have also established the relations for Distance modulus, Luminosity distance, and Angular-diameter distance. Some geometric and physical aspects of the THDE model are also highlighted.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Humam B. Ghassib, Anoud H. Al-Aoon, Ayman S. Sandouqa
In this work, the binding energy of three alkali-metal molecules, namely, lithium-7 (7Li2), sodium-23 (23Na2), and potassium-39 (39K2), is calculated in both free space and the vapor phase. In free space, the Lippmann-Schwinger equation is solved for negative-definite eigenenergies using a highly effective matrix-inversion method with a symmetrized kernel. In the vapor, two medium effects are taken into account: the effective atomic mass, which is somewhat larger than the ‘bare’ mass and therefore enhances the binding; and the effective binary interaction, with less overall attraction than the ‘bare’ interaction. In free space, the binding energies of the respective molecules are, in units of (103 K): 5.304, 2.936, and 2.522. The corresponding experimental results are 6.150 x 103 K, 4.275 x103 K, and 4.275 x 103 K. The results in the vapor phase are by and large somewhat lower than those in free space.
{"title":"Binding Properties of Some Alkali Metal Vapors: Specifically Lithium-7 (<sup>7</sup>Li), Soduim-23 (<sup>23</sup>Na) and Potassium-39 (<sup>39</sup>K)","authors":"Humam B. Ghassib, Anoud H. Al-Aoon, Ayman S. Sandouqa","doi":"10.1139/cjp-2023-0136","DOIUrl":"https://doi.org/10.1139/cjp-2023-0136","url":null,"abstract":"In this work, the binding energy of three alkali-metal molecules, namely, lithium-7 (7Li2), sodium-23 (23Na2), and potassium-39 (39K2), is calculated in both free space and the vapor phase. In free space, the Lippmann-Schwinger equation is solved for negative-definite eigenenergies using a highly effective matrix-inversion method with a symmetrized kernel. In the vapor, two medium effects are taken into account: the effective atomic mass, which is somewhat larger than the ‘bare’ mass and therefore enhances the binding; and the effective binary interaction, with less overall attraction than the ‘bare’ interaction. In free space, the binding energies of the respective molecules are, in units of (103 K): 5.304, 2.936, and 2.522. The corresponding experimental results are 6.150 x 10<sup>3</sup> K, 4.275 x10<sup>3</sup> K, and 4.275 x 10<sup>3</sup> K. The results in the vapor phase are by and large somewhat lower than those in free space.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"185 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135933166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Determining absolute electron impact ionization cross-sections for atoms and molecules, whether through experimental or theoretical means, poses a formidable challenge and is typically limited to a narrow selection of species. In this paper, by using measured cross-sections and polarizability data, it was obtained empirical scaling laws for total single ionization and non-dissociative single ionization cross-section maximum of neutral molecules by collisions with electrons. It is found that the total single ionization cross sections scale linearly with the target electric static polarizability, while the non-dissociate cross sections exhibit a saturation effect for large target polarizabilities. This saturation effect is interpreted as the increasing role of fragmentation with polarizability.
{"title":"On the electron impact cross-section maxima for dissociative and non-dissociative single ionization of molecules and radicals","authors":"Antonio Carlos Fontes dos Santos","doi":"10.1139/cjp-2023-0217","DOIUrl":"https://doi.org/10.1139/cjp-2023-0217","url":null,"abstract":"Determining absolute electron impact ionization cross-sections for atoms and molecules, whether through experimental or theoretical means, poses a formidable challenge and is typically limited to a narrow selection of species. In this paper, by using measured cross-sections and polarizability data, it was obtained empirical scaling laws for total single ionization and non-dissociative single ionization cross-section maximum of neutral molecules by collisions with electrons. It is found that the total single ionization cross sections scale linearly with the target electric static polarizability, while the non-dissociate cross sections exhibit a saturation effect for large target polarizabilities. This saturation effect is interpreted as the increasing role of fragmentation with polarizability.
","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"212 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135876188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The effect of single layer Anti-reflective coating on ZnO based Dye-sensitized solar cells are theoretically predicted and verified by experimental fabrication. By the Transfer Matrix Method (TMM), the absorption of the DSSC with and without the single layer ARC is calculated and the improvement in short-circuit current density (∆Jsc%) is estimated. The optimized thickness of the ARC required to obtain maximum improvement in the short-circuit current density (∆Jsc%) is determined. By employing ARC with the calculated optimized thickness, fabrication of spin coated ZnO based DSSC is carried out. The structural and optical parameters are studied using XRD analysis and UV absorption spectra. The efficiency of the DSSC with and without the ARC is measured by intensity-modulated photocurrent and photovoltage spectroscopy (IMPS/IMVS). The theoretically predicted efficiency of the DSSC with and without ARC agrees well with the experimental values which provide insights about improving the electrical performance of the DSSC by the ARC.
{"title":"Experimental and Theoretical studies on improving efficiency of ZnO based Dye-sensitized solar cells using Single layer Anti-reflective coating","authors":"M. Ismail Fathima, J.R. Sofia, K.S. Joseph Wilson","doi":"10.1139/cjp-2023-0171","DOIUrl":"https://doi.org/10.1139/cjp-2023-0171","url":null,"abstract":"The effect of single layer Anti-reflective coating on ZnO based Dye-sensitized solar cells are theoretically predicted and verified by experimental fabrication. By the Transfer Matrix Method (TMM), the absorption of the DSSC with and without the single layer ARC is calculated and the improvement in short-circuit current density (∆Jsc%) is estimated. The optimized thickness of the ARC required to obtain maximum improvement in the short-circuit current density (∆Jsc%) is determined. By employing ARC with the calculated optimized thickness, fabrication of spin coated ZnO based DSSC is carried out. The structural and optical parameters are studied using XRD analysis and UV absorption spectra. The efficiency of the DSSC with and without the ARC is measured by intensity-modulated photocurrent and photovoltage spectroscopy (IMPS/IMVS). The theoretically predicted efficiency of the DSSC with and without ARC agrees well with the experimental values which provide insights about improving the electrical performance of the DSSC by the ARC.
","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"210 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135876190","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Based on experimental results and self-consistent physical theory, a three-component description of nonlinear body waves in porous media is constructed. Applications of this result to two component fluid flow in dynamic porous media and seismic wave propagation in multiphase porous media are presented. This description is important to petroleum reservoir simulation, groundwater hydrology and seismic analysis of the earth. The two-body analogue of these results has been shown, in the past, to be inconsistent with the two body linear models currently used by petroleum engineers and groundwater hydrologists. In seismic theory simple linear models are generally used and much of the information obtained from the theory presented here is referred to as noise. The processes observed and described here have been patented and applied commercially to oil production and groundwater remediation. It is shown here that even if the correct nonlinear equations are used, three-component wave descriptions of porous media cannot be constructed solely from the equations of motion for the components. This is because of the introduction of the complexity of multiple scales into this non-linear field theory. Information about the coupling between the components is required to obtain a physical description. It is observed that the fields must be coupled in phase and out of phase and this result is consistent with the description of three and n-body gravitational fields in Newtonian gravity and General Relativity.
{"title":"Some Three and n-component Waves in Porous media","authors":"T.J.T Spanos","doi":"10.1139/cjp-2023-0049","DOIUrl":"https://doi.org/10.1139/cjp-2023-0049","url":null,"abstract":"Based on experimental results and self-consistent physical theory, a three-component description of nonlinear body waves in porous media is constructed. Applications of this result to two component fluid flow in dynamic porous media and seismic wave propagation in multiphase porous media are presented. This description is important to petroleum reservoir simulation, groundwater hydrology and seismic analysis of the earth. The two-body analogue of these results has been shown, in the past, to be inconsistent with the two body linear models currently used by petroleum engineers and groundwater hydrologists. In seismic theory simple linear models are generally used and much of the information obtained from the theory presented here is referred to as noise. The processes observed and described here have been patented and applied commercially to oil production and groundwater remediation. It is shown here that even if the correct nonlinear equations are used, three-component wave descriptions of porous media cannot be constructed solely from the equations of motion for the components. This is because of the introduction of the complexity of multiple scales into this non-linear field theory. Information about the coupling between the components is required to obtain a physical description. It is observed that the fields must be coupled in phase and out of phase and this result is consistent with the description of three and n-body gravitational fields in Newtonian gravity and General Relativity.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"22 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136377292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bora Ketenoglu, Erkan Bostanci, Didem Ketenoglu, Ali Can Canbay, Manuel Harder, Adnan Sahin Karaca, Engin Eren, Ayhan Aydin, Zhong Yin, Mehmet Serdar Guzel, Michael Martins
Following the rapid growth in accelerator-based light sources research since the mid of 20th century, miscellaneous 3rd generation Synchrotron Radiation (SR) facilities such as SSRL, APS, ESRF, PETRA-III and SPring-8 have come into existence. These SR source facilities provide 10^20 to 10^25 photons/s/mrad^2/mm^2/0.1%BW peak brightness within the photon energy range of 10-10^5 eV. Since different measurement techniques are utilized at X-ray beamlines of SR facilities, many kinds of Insertion Devices (i.e. undulators and wigglers) and optical components (e.g. High Resolution Monochromators (HRM), Double Crystal Monochromators (DCM), lenses, mirrors etc.) are employed for each experimental setup as a matter of course. Under the circumstances, optimization of a synchrotron beamline is a big concern for many scientists to ensure required radiation characteristics (i.e. photon flux, spot size, photon energy etc.) for dedicated user experiments. In this respect, an in-vacuum hybrid undulator driven by a 6 GeV synchrotron electron beam, is optimized using Evolutionary Algorithms (EA). Finally, it is shown that EA results are well-consistent with both the literature and the analytical calculations, resulting in a promising design estimation for beamline scientists.
{"title":"A Dedicated Application of Evolutionary Algorithms: Synchrotron X-ray Radiation Optimization based on an in-vacuum Undulator","authors":"Bora Ketenoglu, Erkan Bostanci, Didem Ketenoglu, Ali Can Canbay, Manuel Harder, Adnan Sahin Karaca, Engin Eren, Ayhan Aydin, Zhong Yin, Mehmet Serdar Guzel, Michael Martins","doi":"10.1139/cjp-2023-0078","DOIUrl":"https://doi.org/10.1139/cjp-2023-0078","url":null,"abstract":"Following the rapid growth in accelerator-based light sources research since the mid of 20th century, miscellaneous 3rd generation Synchrotron Radiation (SR) facilities such as SSRL, APS, ESRF, PETRA-III and SPring-8 have come into existence. These SR source facilities provide 10^20 to 10^25 photons/s/mrad^2/mm^2/0.1%BW peak brightness within the photon energy range of 10-10^5 eV. Since different measurement techniques are utilized at X-ray beamlines of SR facilities, many kinds of Insertion Devices (i.e. undulators and wigglers) and optical components (e.g. High Resolution Monochromators (HRM), Double Crystal Monochromators (DCM), lenses, mirrors etc.) are employed for each experimental setup as a matter of course. Under the circumstances, optimization of a synchrotron beamline is a big concern for many scientists to ensure required radiation characteristics (i.e. photon flux, spot size, photon energy etc.) for dedicated user experiments. In this respect, an in-vacuum hybrid undulator driven by a 6 GeV synchrotron electron beam, is optimized using Evolutionary Algorithms (EA). Finally, it is shown that EA results are well-consistent with both the literature and the analytical calculations, resulting in a promising design estimation for beamline scientists.","PeriodicalId":9413,"journal":{"name":"Canadian Journal of Physics","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134907161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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